Logos, name Any unautho A produc Engineer es used within this orized use is illega W w d ct of ring Pulse Lim s document are co al and strictly proh Wha when dissi mited, UK opyrighted by Eng hibited. at to n we imila gineering Pulse © con eldin ar m 2013 nside ng mater er rials Sales: sa s Info: weld@ ales@enginee @weldpulse.c eringpulse.co com o.uk
What to Consider When Welding Dissimilar Materials
Jan 02, 2016
This document is a simple guide to know the factors to be considered when welding two dissimilar materials. Most commonly used materials in petrochemicals have been considered including carbon steels, alloy steels, stainless steels and nickel alloys.
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Logos, nameAny unautho
A product ofEngineering Pulse Limited, UK
es used within thishorized use is illega
What to consider
when
dissimilar
A product of Engineering Pulse Limited, UK
his document are cogal and strictly proh
What to consider
when
dissimilar
Engineering Pulse Limited, UK
copyrighted by Engohibited.
What to consider
when welding
dissimilar
ngineering Pulse ©
What to consider
welding
dissimilar materials
© 2013
What to consider
welding
materials
What to consider
materials
Sales: [email protected]
materials
Info: [email protected]@engineeringpulse.co.uk
[email protected]@engineeringpulse.co.uk
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A product ofEngineering Pulse Limited, UK
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Dissimilar welding i
to weld two different materials in piping where we have specification break
Then we need to weld some dissimilar metals in pressure vessel
Designers, most of the times, try to avoid dissimilar welding however
Therefore, one needs to know about the details of dissimilar welding, possible combinations and the
combinations which must not be welded.
This is a guide to weld dissimilar metals. It will take you through all the considerati
dealing with
performance of a dissimilar weld and their significance.
mind a list of factors to be consi
P a g e
A product of Engineering Pulse Limited, UK
his document are cogal and strictly proh
What to consider when welding dissimilar materials
Dissimilar welding is not uncommon in petrochemical, oil & gas, refining and energy sectors.
to weld two different materials in piping where we have specification break
Then we need to weld some dissimilar metals in pressure vessel
Designers, most of the times, try to avoid dissimilar welding however
Therefore, one needs to know about the details of dissimilar welding, possible combinations and the
combinations which must not be welded.
This is a guide to weld dissimilar metals. It will take you through all the considerati
with dissimilar welding. The purpose of this guide is to look into the factors affecting the
performance of a dissimilar weld and their significance.
mind a list of factors to be consi
Engineering Pulse Limited, UK
copyrighted by Engohibited.
hat to consider when welding dissimilar materials
not uncommon in petrochemical, oil & gas, refining and energy sectors.
to weld two different materials in piping where we have specification break
Then we need to weld some dissimilar metals in pressure vessel
Designers, most of the times, try to avoid dissimilar welding however
Therefore, one needs to know about the details of dissimilar welding, possible combinations and the
combinations which must not be welded.
This is a guide to weld dissimilar metals. It will take you through all the considerati
dissimilar welding. The purpose of this guide is to look into the factors affecting the
performance of a dissimilar weld and their significance.
mind a list of factors to be considered while making any decision on welding two dissimilar metals.
ngineering Pulse ©
hat to consider when welding dissimilar materials
not uncommon in petrochemical, oil & gas, refining and energy sectors.
to weld two different materials in piping where we have specification break
Then we need to weld some dissimilar metals in pressure vessel
Designers, most of the times, try to avoid dissimilar welding however
Therefore, one needs to know about the details of dissimilar welding, possible combinations and the
combinations which must not be welded.
This is a guide to weld dissimilar metals. It will take you through all the considerati
dissimilar welding. The purpose of this guide is to look into the factors affecting the
performance of a dissimilar weld and their significance.
dered while making any decision on welding two dissimilar metals.
First
© 2013
hat to consider when welding dissimilar materials
not uncommon in petrochemical, oil & gas, refining and energy sectors.
to weld two different materials in piping where we have specification break
Then we need to weld some dissimilar metals in pressure vessel
Designers, most of the times, try to avoid dissimilar welding however
Therefore, one needs to know about the details of dissimilar welding, possible combinations and the
This is a guide to weld dissimilar metals. It will take you through all the considerati
dissimilar welding. The purpose of this guide is to look into the factors affecting the
performance of a dissimilar weld and their significance. After going through this, you will be carrying in
dered while making any decision on welding two dissimilar metals.
First Words
hat to consider when welding dissimilar materials
not uncommon in petrochemical, oil & gas, refining and energy sectors.
to weld two different materials in piping where we have specification break
Then we need to weld some dissimilar metals in pressure vessels and heat exchangers fabrication also.
Designers, most of the times, try to avoid dissimilar welding however
Therefore, one needs to know about the details of dissimilar welding, possible combinations and the
This is a guide to weld dissimilar metals. It will take you through all the considerati
dissimilar welding. The purpose of this guide is to look into the factors affecting the
After going through this, you will be carrying in
dered while making any decision on welding two dissimilar metals.
Words
Sales: [email protected]
hat to consider when welding dissimilar materials
not uncommon in petrochemical, oil & gas, refining and energy sectors.
to weld two different materials in piping where we have specification break or design requirement
and heat exchangers fabrication also.
Designers, most of the times, try to avoid dissimilar welding however it is not always achievable.
Therefore, one needs to know about the details of dissimilar welding, possible combinations and the
This is a guide to weld dissimilar metals. It will take you through all the considerations required while
dissimilar welding. The purpose of this guide is to look into the factors affecting the
After going through this, you will be carrying in
dered while making any decision on welding two dissimilar metals.
Info: [email protected]@engineeringpulse.co.uk
not uncommon in petrochemical, oil & gas, refining and energy sectors. We need
or design requirement
and heat exchangers fabrication also.
it is not always achievable.
Therefore, one needs to know about the details of dissimilar welding, possible combinations and the
ons required while
dissimilar welding. The purpose of this guide is to look into the factors affecting the
After going through this, you will be carrying in
dered while making any decision on welding two dissimilar metals.
[email protected]@engineeringpulse.co.uk
We need
or design requirement.
and heat exchangers fabrication also.
it is not always achievable.
Therefore, one needs to know about the details of dissimilar welding, possible combinations and the
ons required while
dissimilar welding. The purpose of this guide is to look into the factors affecting the
After going through this, you will be carrying in
dered while making any decision on welding two dissimilar metals.
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Choosing
The factors need to be considered while
in the diagram below. Every factor has been explained briefly in the next paragraphs.
Cracking:Cracking can happen frequently when welding dissimilar metals.
some dilution without forming a crack sensitive weld.
Corrosion resistance:Against whatever damage mechanisms, a less resistive base metal among the two being welded
offers good resistance, filler metal should handle them all. Low alloy steel and stainless steel
weld being made to resist any hydrogen attack
pressure should be completed with a filler metal having this resistance.
Physical properties:Physical properties especially the thermal coefficient of expansion of the weld metal shall be
close to the base meta
between the values for the base metals.
High temperature:
For high temperature application, a filler metal not prone to any oxidation, embrittlement or
other high temperature damages must be chosen.
P a g e
A product of Engineering Pulse Limited, UK
his document are cogal and strictly proh
What to consider when welding dissimilar materials
Choosing filler metal
The factors need to be considered while
in the diagram below. Every factor has been explained briefly in the next paragraphs.
Cracking: Cracking can happen frequently when welding dissimilar metals.
some dilution without forming a crack sensitive weld.
Corrosion resistance:Against whatever damage mechanisms, a less resistive base metal among the two being welded
offers good resistance, filler metal should handle them all. Low alloy steel and stainless steel
weld being made to resist any hydrogen attack
pressure should be completed with a filler metal having this resistance.
Physical properties:Physical properties especially the thermal coefficient of expansion of the weld metal shall be
close to the base meta
between the values for the base metals.
High temperature:
For high temperature application, a filler metal not prone to any oxidation, embrittlement or
other high temperature damages must be chosen.
Interstitial elements
Engineering Pulse Limited, UK
copyrighted by Engohibited.
hat to consider when welding dissimilar materials
Fig. 1 Representation of properties linked with Ferrite Number
filler metal
The factors need to be considered while
in the diagram below. Every factor has been explained briefly in the next paragraphs.
Cracking can happen frequently when welding dissimilar metals.
some dilution without forming a crack sensitive weld.
Corrosion resistance: Against whatever damage mechanisms, a less resistive base metal among the two being welded
offers good resistance, filler metal should handle them all. Low alloy steel and stainless steel
weld being made to resist any hydrogen attack
pressure should be completed with a filler metal having this resistance.
Physical properties: Physical properties especially the thermal coefficient of expansion of the weld metal shall be
close to the base metals when the weld has to see higher temperature.
between the values for the base metals.
For high temperature application, a filler metal not prone to any oxidation, embrittlement or
other high temperature damages must be chosen.
Ductility
Interstitial elements
High temperature
ngineering Pulse ©
hat to consider when welding dissimilar materials
Fig. 1 Representation of properties linked with Ferrite Number
filler metal
The factors need to be considered while choosing a filler metal for
in the diagram below. Every factor has been explained briefly in the next paragraphs.
Cracking can happen frequently when welding dissimilar metals.
some dilution without forming a crack sensitive weld.
Against whatever damage mechanisms, a less resistive base metal among the two being welded
offers good resistance, filler metal should handle them all. Low alloy steel and stainless steel
weld being made to resist any hydrogen attack
pressure should be completed with a filler metal having this resistance.
Physical properties especially the thermal coefficient of expansion of the weld metal shall be
ls when the weld has to see higher temperature.
between the values for the base metals.
For high temperature application, a filler metal not prone to any oxidation, embrittlement or
other high temperature damages must be chosen.
Dissimilar Welding Choosing
Physical properties
Melting temperature
temperature
© 2013
hat to consider when welding dissimilar materials
Fig. 1 Representation of properties linked with Ferrite Number
choosing a filler metal for
in the diagram below. Every factor has been explained briefly in the next paragraphs.
Cracking can happen frequently when welding dissimilar metals.
some dilution without forming a crack sensitive weld.
Against whatever damage mechanisms, a less resistive base metal among the two being welded
offers good resistance, filler metal should handle them all. Low alloy steel and stainless steel
weld being made to resist any hydrogen attack at certain temperature and hydrogen partial
pressure should be completed with a filler metal having this resistance.
Physical properties especially the thermal coefficient of expansion of the weld metal shall be
ls when the weld has to see higher temperature.
For high temperature application, a filler metal not prone to any oxidation, embrittlement or
other high temperature damages must be chosen.
Dissimilar Welding -Choosing
Filler
Physical properties
Weldability
hat to consider when welding dissimilar materials
Fig. 1 Representation of properties linked with Ferrite Number
choosing a filler metal for dissimilar welding are
in the diagram below. Every factor has been explained briefly in the next paragraphs.
Cracking can happen frequently when welding dissimilar metals. Filler metal must be capable of
Against whatever damage mechanisms, a less resistive base metal among the two being welded
offers good resistance, filler metal should handle them all. Low alloy steel and stainless steel
at certain temperature and hydrogen partial
pressure should be completed with a filler metal having this resistance.
Physical properties especially the thermal coefficient of expansion of the weld metal shall be
ls when the weld has to see higher temperature.
For high temperature application, a filler metal not prone to any oxidation, embrittlement or
Mechanical properties
Corrosion properties
Weldability
Sales: [email protected]
hat to consider when welding dissimilar materials
Fig. 1 Representation of properties linked with Ferrite Number
dissimilar welding are
in the diagram below. Every factor has been explained briefly in the next paragraphs.
Filler metal must be capable of
Against whatever damage mechanisms, a less resistive base metal among the two being welded
offers good resistance, filler metal should handle them all. Low alloy steel and stainless steel
at certain temperature and hydrogen partial
pressure should be completed with a filler metal having this resistance.
Physical properties especially the thermal coefficient of expansion of the weld metal shall be
ls when the weld has to see higher temperature. The value should be
For high temperature application, a filler metal not prone to any oxidation, embrittlement or
Cracking
Corrosion properties
Info: [email protected]@engineeringpulse.co.uk
Fig. 1 Representation of properties linked with Ferrite Number
dissimilar welding are shown
in the diagram below. Every factor has been explained briefly in the next paragraphs.
Filler metal must be capable of
Against whatever damage mechanisms, a less resistive base metal among the two being welded
offers good resistance, filler metal should handle them all. Low alloy steel and stainless steel
at certain temperature and hydrogen partial
Physical properties especially the thermal coefficient of expansion of the weld metal shall be
The value should be
For high temperature application, a filler metal not prone to any oxidation, embrittlement or
[email protected]@engineeringpulse.co.uk
shown
Filler metal must be capable of
Against whatever damage mechanisms, a less resistive base metal among the two being welded
offers good resistance, filler metal should handle them all. Low alloy steel and stainless steel
at certain temperature and hydrogen partial
Physical properties especially the thermal coefficient of expansion of the weld metal shall be
The value should be
For high temperature application, a filler metal not prone to any oxidation, embrittlement or
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Mechanical properties:
Choose a filler metal equally strong and ductile as the weaker of the base metals to be welded.
Weldability:Selected filler metal must have good weldability related to dilution, melting temperature and
other physical property requirements.
Melting temperature:Melting temperature of the filler metal must be matching to the base metal having lower
melting temperature. Selecting high melting temperature filler metal would cause excessive
dilution of the on
Ductility:Filler metal must be ductile enough to sustain all the stresses caused by temperature changes
due to different thermal conductivities of the base metals. Otherwise, cracking may take place.
Interstitial Elements like oxygen, carbon, nitrogen, hydrogen must be low to have a ductile and less prone
to hot cracking weld.
Selection of welding process is also important when welding dissimilar metals.
During welding, materials with high chemical composition may get diluted and that dilution may
impact on the overall properties and performance of the weld. Dilution depends up
welding process selected and the filler metal being used. With SMAW, dilution is 30 percent and
for gas welding processes, it varies from 10 to 50 percent. Dilution is further affected by the joint
design and fit
Selecting
Different
P a g e
A product of Engineering Pulse Limited, UK
his document are cogal and strictly proh
What to consider when welding dissimilar materials
Mechanical properties:Choose a filler metal equally strong and ductile as the weaker of the base metals to be welded.
Weldability: Selected filler metal must have good weldability related to dilution, melting temperature and
ther physical property requirements.
Melting temperature:Melting temperature of the filler metal must be matching to the base metal having lower
melting temperature. Selecting high melting temperature filler metal would cause excessive
dilution of the one having lower melting temperature.
Ductility: Filler metal must be ductile enough to sustain all the stresses caused by temperature changes
due to different thermal conductivities of the base metals. Otherwise, cracking may take place.
Interstitial elements:Elements like oxygen, carbon, nitrogen, hydrogen must be low to have a ductile and less prone
to hot cracking weld.
Selection of welding process is also important when welding dissimilar metals.
During welding, materials with high chemical composition may get diluted and that dilution may
impact on the overall properties and performance of the weld. Dilution depends up
welding process selected and the filler metal being used. With SMAW, dilution is 30 percent and
for gas welding processes, it varies from 10 to 50 percent. Dilution is further affected by the joint
design and fit-up.
Selecting welding process
Different dissimilar combinations
Engineering Pulse Limited, UK
copyrighted by Engohibited.
hat to consider when welding dissimilar materials
Mechanical properties: Choose a filler metal equally strong and ductile as the weaker of the base metals to be welded.
Selected filler metal must have good weldability related to dilution, melting temperature and
ther physical property requirements.
Melting temperature: Melting temperature of the filler metal must be matching to the base metal having lower
melting temperature. Selecting high melting temperature filler metal would cause excessive
e having lower melting temperature.
Filler metal must be ductile enough to sustain all the stresses caused by temperature changes
due to different thermal conductivities of the base metals. Otherwise, cracking may take place.
elements: Elements like oxygen, carbon, nitrogen, hydrogen must be low to have a ductile and less prone
to hot cracking weld.
Selection of welding process is also important when welding dissimilar metals.
During welding, materials with high chemical composition may get diluted and that dilution may
impact on the overall properties and performance of the weld. Dilution depends up
welding process selected and the filler metal being used. With SMAW, dilution is 30 percent and
for gas welding processes, it varies from 10 to 50 percent. Dilution is further affected by the joint
welding process
dissimilar combinations
ngineering Pulse ©
hat to consider when welding dissimilar materials
Choose a filler metal equally strong and ductile as the weaker of the base metals to be welded.
Selected filler metal must have good weldability related to dilution, melting temperature and
ther physical property requirements.
Melting temperature of the filler metal must be matching to the base metal having lower
melting temperature. Selecting high melting temperature filler metal would cause excessive
e having lower melting temperature.
Filler metal must be ductile enough to sustain all the stresses caused by temperature changes
due to different thermal conductivities of the base metals. Otherwise, cracking may take place.
Elements like oxygen, carbon, nitrogen, hydrogen must be low to have a ductile and less prone
Selection of welding process is also important when welding dissimilar metals.
During welding, materials with high chemical composition may get diluted and that dilution may
impact on the overall properties and performance of the weld. Dilution depends up
welding process selected and the filler metal being used. With SMAW, dilution is 30 percent and
for gas welding processes, it varies from 10 to 50 percent. Dilution is further affected by the joint
welding process
dissimilar combinations
Nickel alloys
© 2013
hat to consider when welding dissimilar materials
Choose a filler metal equally strong and ductile as the weaker of the base metals to be welded.
Selected filler metal must have good weldability related to dilution, melting temperature and
Melting temperature of the filler metal must be matching to the base metal having lower
melting temperature. Selecting high melting temperature filler metal would cause excessive
e having lower melting temperature.
Filler metal must be ductile enough to sustain all the stresses caused by temperature changes
due to different thermal conductivities of the base metals. Otherwise, cracking may take place.
Elements like oxygen, carbon, nitrogen, hydrogen must be low to have a ductile and less prone
Selection of welding process is also important when welding dissimilar metals.
During welding, materials with high chemical composition may get diluted and that dilution may
impact on the overall properties and performance of the weld. Dilution depends up
welding process selected and the filler metal being used. With SMAW, dilution is 30 percent and
for gas welding processes, it varies from 10 to 50 percent. Dilution is further affected by the joint
dissimilar combinations
Carbon steels
Stainless steels
Nickel alloys
hat to consider when welding dissimilar materials
Choose a filler metal equally strong and ductile as the weaker of the base metals to be welded.
Selected filler metal must have good weldability related to dilution, melting temperature and
Melting temperature of the filler metal must be matching to the base metal having lower
melting temperature. Selecting high melting temperature filler metal would cause excessive
Filler metal must be ductile enough to sustain all the stresses caused by temperature changes
due to different thermal conductivities of the base metals. Otherwise, cracking may take place.
Elements like oxygen, carbon, nitrogen, hydrogen must be low to have a ductile and less prone
Selection of welding process is also important when welding dissimilar metals.
During welding, materials with high chemical composition may get diluted and that dilution may
impact on the overall properties and performance of the weld. Dilution depends up
welding process selected and the filler metal being used. With SMAW, dilution is 30 percent and
for gas welding processes, it varies from 10 to 50 percent. Dilution is further affected by the joint
Carbon steels
Stainless steels
Sales: [email protected]
hat to consider when welding dissimilar materials
Choose a filler metal equally strong and ductile as the weaker of the base metals to be welded.
Selected filler metal must have good weldability related to dilution, melting temperature and
Melting temperature of the filler metal must be matching to the base metal having lower
melting temperature. Selecting high melting temperature filler metal would cause excessive
Filler metal must be ductile enough to sustain all the stresses caused by temperature changes
due to different thermal conductivities of the base metals. Otherwise, cracking may take place.
Elements like oxygen, carbon, nitrogen, hydrogen must be low to have a ductile and less prone
Selection of welding process is also important when welding dissimilar metals.
During welding, materials with high chemical composition may get diluted and that dilution may
impact on the overall properties and performance of the weld. Dilution depends up
welding process selected and the filler metal being used. With SMAW, dilution is 30 percent and
for gas welding processes, it varies from 10 to 50 percent. Dilution is further affected by the joint
Alloy steels
Info: [email protected]@engineeringpulse.co.uk
Choose a filler metal equally strong and ductile as the weaker of the base metals to be welded.
Selected filler metal must have good weldability related to dilution, melting temperature and
Melting temperature of the filler metal must be matching to the base metal having lower
melting temperature. Selecting high melting temperature filler metal would cause excessive
Filler metal must be ductile enough to sustain all the stresses caused by temperature changes
due to different thermal conductivities of the base metals. Otherwise, cracking may take place.
Elements like oxygen, carbon, nitrogen, hydrogen must be low to have a ductile and less prone
During welding, materials with high chemical composition may get diluted and that dilution may
impact on the overall properties and performance of the weld. Dilution depends upon the
welding process selected and the filler metal being used. With SMAW, dilution is 30 percent and
for gas welding processes, it varies from 10 to 50 percent. Dilution is further affected by the joint
[email protected]@engineeringpulse.co.uk
Selected filler metal must have good weldability related to dilution, melting temperature and
Melting temperature of the filler metal must be matching to the base metal having lower
melting temperature. Selecting high melting temperature filler metal would cause excessive
Filler metal must be ductile enough to sustain all the stresses caused by temperature changes
Elements like oxygen, carbon, nitrogen, hydrogen must be low to have a ductile and less prone
During welding, materials with high chemical composition may get diluted and that dilution may
on the
welding process selected and the filler metal being used. With SMAW, dilution is 30 percent and
for gas welding processes, it varies from 10 to 50 percent. Dilution is further affected by the joint
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Carbon & low alloy steels
Specific considerations
Filler selection
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What to consider when welding dissimilar materials
Carbon & low alloy steels
Specific considerations
Filler selection
Austenitic stainless steel filler
• E/ER-
• Chances of carbon migration at higher temperatures
Nickel alloy filler
• ENiCrFe
• Recommended for high temperature
High temperature
Thermal stresses
Ferrite Number
Engineering Pulse Limited, UK
copyrighted by Engohibited.
hat to consider when welding dissimilar materials
Carbon & low alloy steels
Specific considerations
Austenitic stainless steel filler
-309
Chances of carbon migration at higher temperatures
Nickel alloy filler
ENiCrFe-2 / 3, ERNiCr
Recommended for high temperature
High temperature
PWHT
Thermal stresses
Ferrite Number
ngineering Pulse ©
hat to consider when welding dissimilar materials
Carbon & low alloy steels to Austenitic
Austenitic stainless steel filler
Chances of carbon migration at higher temperatures
Nickel alloy filler
2 / 3, ERNiCr-3
Recommended for high temperature
•Service temperature exceeding 700 F migration from austentic stainless steel filler
•Recommended filler is nickel alloyHigh temperature
•Carbon or alloy steel requiring PWHT may be buttered with ERNiCrbefore welding to SS
•PWHT, if required, must not be waived off
•Thermal coefficient must be considered for the base metals to be welded. Major difference leads to high thermal stresses at elevated temperatures
Thermal stresses
•When using austenitic filler metal, resulting weld ferrite number need to be predicted. Refere WeldPulse guide over ferrite numberFerrite Number
© 2013
hat to consider when welding dissimilar materials
Austenitic
Austenitic stainless steel filler
Chances of carbon migration at higher temperatures
Recommended for high temperature
Service temperature exceeding 700 F migration from austentic stainless steel filler
Recommended filler is nickel alloy
Carbon or alloy steel requiring PWHT may be buttered with ERNiCrbefore welding to SS
PWHT, if required, must not be waived off
Thermal coefficient must be considered for the base metals to be welded. Major difference leads to high thermal stresses at elevated temperatures
When using austenitic filler metal, resulting weld ferrite number need to be predicted. Refere WeldPulse guide over ferrite number
hat to consider when welding dissimilar materials
Austenitic Stainless steels
Chances of carbon migration at higher temperatures
Service temperature exceeding 700 F migration from austentic stainless steel filler
Recommended filler is nickel alloy
Carbon or alloy steel requiring PWHT may be buttered with ERNiCr-3 and heat treated before welding to SS
PWHT, if required, must not be waived off
Thermal coefficient must be considered for the base metals to be welded. Major difference leads to high thermal stresses at elevated temperatures
When using austenitic filler metal, resulting weld ferrite number need to be predicted. Refere WeldPulse guide over ferrite number
Sales: [email protected]
hat to consider when welding dissimilar materials
Stainless steels
Chances of carbon migration at higher temperatures
Service temperature exceeding 700 F - carbon migration from austentic stainless steel filler
Recommended filler is nickel alloy
Carbon or alloy steel requiring PWHT may be 3 and heat treated
PWHT, if required, must not be waived off
Thermal coefficient must be considered for the base metals to be welded. Major difference leads to high thermal stresses at
When using austenitic filler metal, resulting weld ferrite number need to be predicted. Refere WeldPulse guide over ferrite number
Info: [email protected]@engineeringpulse.co.uk
Stainless steels (300 series)
carbon migration from austentic stainless steel filler
Carbon or alloy steel requiring PWHT may be
When using austenitic filler metal, resulting
Refere WeldPulse guide over ferrite number
[email protected]@engineeringpulse.co.uk
(300 series)
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Carbon & low alloy steels to
Filler selection
Specific considerations
P a g e
A product of Engineering Pulse Limited, UK
his document are cogal and strictly proh
What to consider when welding dissimilar materials
Carbon & low alloy steels to
Filler selection
Specific considerations
High temperature
Filler containing Cr equal to one having less Cr
• Perform PWHT
Austenitic filler wire
• E/ER
• Not applicable if any steel is to be used as a pressure vessel
Carbon steel suiting filler in case of CS to Cr SS
• A Cr SS suiting filler can also be used but preferable to use less hardenable filler
Engineering Pulse Limited, UK
copyrighted by Engohibited.
hat to consider when welding dissimilar materials
Carbon & low alloy steels to
Specific considerations
High temperature
PWHT
Filler containing Cr equal to one having less Cr
Perform PWHT
Austenitic filler wire
E/ER-309
Not applicable if any steel is to be used as a pressure vessel
Carbon steel suiting filler in case of CS to Cr SS
A Cr SS suiting filler can also be used but preferable to use less hardenable filler
ngineering Pulse ©
hat to consider when welding dissimilar materials
Carbon & low alloy steels to C
High temperature
PWHT
Filler containing Cr equal to one having less Cr
Perform PWHT
Austenitic filler wire
Not applicable if any steel is to be used as a pressure vessel
Carbon steel suiting filler in case of CS to Cr SS
A Cr SS suiting filler can also be used but preferable to use less hardenable filler
© 2013
hat to consider when welding dissimilar materials
Cr Stainless steels
• Operation upto 800 F
• Above this temperature, careful assessment is required
• Heat treated requirement should be assessed carefully
• Follow the construction code requirements
Filler containing Cr equal to one having less Cr
Not applicable if any steel is to be used as a pressure vessel
Carbon steel suiting filler in case of CS to Cr SS
A Cr SS suiting filler can also be used but preferable to use less
hat to consider when welding dissimilar materials
Stainless steels
Operation upto 800 F
Above this temperature, careful assessment is required
Heat treated requirement should be assessed carefully
Follow the construction code requirements
Filler containing Cr equal to one having less Cr
Not applicable if any steel is to be used as a pressure vessel
Carbon steel suiting filler in case of CS to Cr SS
A Cr SS suiting filler can also be used but preferable to use less
Sales: [email protected]
hat to consider when welding dissimilar materials
Stainless steels (400 series
Operation upto 800 F
Above this temperature, careful assessment is required
Heat treated requirement should be assessed carefully
Follow the construction code
Filler containing Cr equal to one having less Cr
Not applicable if any steel is to be used as a pressure vessel
Carbon steel suiting filler in case of CS to Cr SS
A Cr SS suiting filler can also be used but preferable to use less
Info: [email protected]@engineeringpulse.co.uk
(400 series)
Above this temperature, careful
Heat treated requirement should
A Cr SS suiting filler can also be used but preferable to use less
[email protected]@engineeringpulse.co.uk
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Nickel alloys
Filler selection
Specific considerations
P a g e
A product of Engineering Pulse Limited, UK
his document are cogal and strictly proh
What to consider when welding dissimilar materials
Nickel alloys
Filler selection
Specific considerations
Nickel alloy / Nickel Chromium
• Nickel alloy fillers should be used to join nickel alloys to CS, alloy steel or stainless steels. No other filler should be considered. Ni alloy fillers are selected due to their good ductility and tolerance of dilution by iron in steel
dilution
Chromium dilution
PWHT
Engineering Pulse Limited, UK
copyrighted by Engohibited.
hat to consider when welding dissimilar materials
Nickel alloys to steels
Specific considerations
Nickel alloy / Nickel Chromium
Nickel alloy fillers should be used to join nickel alloys to CS, alloy steel or stainless steels. No other filler should be considered. Ni alloy fillers are selected due to their good ductility and tolerance of dilution by iron in steel
Iron dilution
Chromium dilution
PWHT
ngineering Pulse ©
hat to consider when welding dissimilar materials
to steels
Nickel alloy / Nickel Chromium
Nickel alloy fillers should be used to join nickel alloys to CS, alloy steel or stainless steels. No other filler should be considered. Ni alloy fillers are selected due to their good ductility and tolerance of dilution by iron in steel
• Iron dilution if couldn't be tolerated during welding to any steel to nickel alloy would cause hot cracking
• It depends upon the filler used and the welding process
• SMAW process with nickel alloy or Nickel chromium can handle iron dilution up to 40%dilution
• Chromium dilution may also take place while welding stainless steels to Nickel. It can be controlled by using Nickel or Nickel Chromium filler
• Welding process doesn't have much of impact over chromium dilution
Chromium dilution
• PWHT shall be done as required by the steel end side.
PWHT
© 2013
hat to consider when welding dissimilar materials
Nickel alloy / Nickel Chromium
Nickel alloy fillers should be used to join nickel alloys to CS, alloy steel or stainless steels. No other filler should be considered. Ni alloy fillers are selected due to their good ductility and tolerance
Iron dilution if couldn't be tolerated during welding to any steel to nickel alloy would cause hot cracking
It depends upon the filler used and the welding process
SMAW process with nickel alloy or Nickel chromium can handle iron dilution up to 40%
Chromium dilution may also take place while welding stainless steels to Nickel. It can be controlled by using Nickel or Nickel Chromium filler
Welding process doesn't have much of impact over chromium dilution
PWHT shall be done as required by the steel end side.
hat to consider when welding dissimilar materials
Nickel alloy fillers should be used to join nickel alloys to CS, alloy steel or stainless steels. No other filler should be considered. Ni alloy fillers are selected due to their good ductility and tolerance
Iron dilution if couldn't be tolerated during welding to any steel to nickel alloy would cause hot cracking
It depends upon the filler used and the welding process
SMAW process with nickel alloy or Nickel chromium can handle iron dilution up to 40%
Chromium dilution may also take place while welding stainless steels to Nickel. It can be controlled by using Nickel or Nickel Chromium filler
Welding process doesn't have much of impact over
PWHT shall be done as required by the steel end side.
Sales: [email protected]
hat to consider when welding dissimilar materials
Nickel alloy fillers should be used to join nickel alloys to CS, alloy steel or stainless steels. No other filler should be considered. Ni alloy fillers are selected due to their good ductility and tolerance
Iron dilution if couldn't be tolerated during welding to any steel to nickel alloy would cause hot cracking
It depends upon the filler used and the welding process
SMAW process with nickel alloy or Nickel chromium can
Chromium dilution may also take place while welding stainless steels to Nickel. It can be controlled by using
Welding process doesn't have much of impact over
PWHT shall be done as required by the steel end side.
Info: [email protected]@engineeringpulse.co.uk
Nickel alloy fillers should be used to join nickel alloys to CS, alloy steel or stainless steels. No other filler should be considered. Ni alloy fillers are selected due to their good ductility and tolerance
Iron dilution if couldn't be tolerated during welding to
It depends upon the filler used and the welding process
SMAW process with nickel alloy or Nickel chromium can
stainless steels to Nickel. It can be controlled by using
[email protected]@engineeringpulse.co.uk
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8 | P a g e
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Determining
For dissimilar welding, resultant weld composition can be estimated if dilution is known. As told
earlier, dilution is based upon the welding process being used. For SMAW, dilution is almost 30%.
Resultant composition is measured for each critical element based upon the dilution percentage.
We need to know the chemical composition of bot
used.
Taking on example of welding P11 to SS304 with SMAW
the weld
Cr (weld) = Cr (P11) * 0.15 + Cr (304) * 0.15 + Cr (309) * 0.70
All compositions in %
Same formula can then be used for other elements.
Final
Dealing with dissimilar welding requires good knowledge of materials being joined and the
critical issues associated with their welding. Typical guidelines have been provided within this
document however service conditions and other codes requ
wherever stands ma
As a general rule, preheat and post weld heat treatment
material requiring high temperature and holding time. Filler metal selection should be made
considering all the factors defined above and t
should suit the service conditions. These guidelines should be used only for getting a procedure
qualified and not for applying them directly without qualification.
P a g e
A product of Engineering Pulse Limited, UK
his document are cogal and strictly proh
What to consider when welding dissimilar materials
Determining
For dissimilar welding, resultant weld composition can be estimated if dilution is known. As told
earlier, dilution is based upon the welding process being used. For SMAW, dilution is almost 30%.
Resultant composition is measured for each critical element based upon the dilution percentage.
We need to know the chemical composition of bot
Taking on example of welding P11 to SS304 with SMAW
the weld can be estimated as follows:
Cr (weld) = Cr (P11) * 0.15 + Cr (304) * 0.15 + Cr (309) * 0.70
All compositions in %
Same formula can then be used for other elements.
Final Words
Dealing with dissimilar welding requires good knowledge of materials being joined and the
critical issues associated with their welding. Typical guidelines have been provided within this
document however service conditions and other codes requ
herever stands ma
As a general rule, preheat and post weld heat treatment
material requiring high temperature and holding time. Filler metal selection should be made
considering all the factors defined above and t
should suit the service conditions. These guidelines should be used only for getting a procedure
qualified and not for applying them directly without qualification.
Engineering Pulse Limited, UK
copyrighted by Engohibited.
hat to consider when welding dissimilar materials
Determining resultant weld composition
For dissimilar welding, resultant weld composition can be estimated if dilution is known. As told
earlier, dilution is based upon the welding process being used. For SMAW, dilution is almost 30%.
Resultant composition is measured for each critical element based upon the dilution percentage.
We need to know the chemical composition of bot
Taking on example of welding P11 to SS304 with SMAW
can be estimated as follows:
Cr (weld) = Cr (P11) * 0.15 + Cr (304) * 0.15 + Cr (309) * 0.70
All compositions in %
Same formula can then be used for other elements.
Words
Dealing with dissimilar welding requires good knowledge of materials being joined and the
critical issues associated with their welding. Typical guidelines have been provided within this
document however service conditions and other codes requ
herever stands mandatory.
As a general rule, preheat and post weld heat treatment
material requiring high temperature and holding time. Filler metal selection should be made
considering all the factors defined above and t
should suit the service conditions. These guidelines should be used only for getting a procedure
qualified and not for applying them directly without qualification.
ngineering Pulse ©
hat to consider when welding dissimilar materials
resultant weld composition
For dissimilar welding, resultant weld composition can be estimated if dilution is known. As told
earlier, dilution is based upon the welding process being used. For SMAW, dilution is almost 30%.
Resultant composition is measured for each critical element based upon the dilution percentage.
We need to know the chemical composition of bot
Taking on example of welding P11 to SS304 with SMAW
can be estimated as follows:
Cr (weld) = Cr (P11) * 0.15 + Cr (304) * 0.15 + Cr (309) * 0.70
Same formula can then be used for other elements.
Dealing with dissimilar welding requires good knowledge of materials being joined and the
critical issues associated with their welding. Typical guidelines have been provided within this
document however service conditions and other codes requ
As a general rule, preheat and post weld heat treatment
material requiring high temperature and holding time. Filler metal selection should be made
considering all the factors defined above and t
should suit the service conditions. These guidelines should be used only for getting a procedure
qualified and not for applying them directly without qualification.
© 2013
hat to consider when welding dissimilar materials
resultant weld composition
For dissimilar welding, resultant weld composition can be estimated if dilution is known. As told
earlier, dilution is based upon the welding process being used. For SMAW, dilution is almost 30%.
Resultant composition is measured for each critical element based upon the dilution percentage.
We need to know the chemical composition of both the metals being joined and the
Taking on example of welding P11 to SS304 with SMAW
Cr (weld) = Cr (P11) * 0.15 + Cr (304) * 0.15 + Cr (309) * 0.70
Same formula can then be used for other elements.
Dealing with dissimilar welding requires good knowledge of materials being joined and the
critical issues associated with their welding. Typical guidelines have been provided within this
document however service conditions and other codes requ
As a general rule, preheat and post weld heat treatment
material requiring high temperature and holding time. Filler metal selection should be made
considering all the factors defined above and the typical
should suit the service conditions. These guidelines should be used only for getting a procedure
qualified and not for applying them directly without qualification.
hat to consider when welding dissimilar materials
resultant weld composition
For dissimilar welding, resultant weld composition can be estimated if dilution is known. As told
earlier, dilution is based upon the welding process being used. For SMAW, dilution is almost 30%.
Resultant composition is measured for each critical element based upon the dilution percentage.
h the metals being joined and the
Taking on example of welding P11 to SS304 with SMAW using E309,
Cr (weld) = Cr (P11) * 0.15 + Cr (304) * 0.15 + Cr (309) * 0.70
Dealing with dissimilar welding requires good knowledge of materials being joined and the
critical issues associated with their welding. Typical guidelines have been provided within this
document however service conditions and other codes requirements should also be considered
requirements
material requiring high temperature and holding time. Filler metal selection should be made
he typical resultant
should suit the service conditions. These guidelines should be used only for getting a procedure
qualified and not for applying them directly without qualification.
Sales: [email protected]
hat to consider when welding dissimilar materials
For dissimilar welding, resultant weld composition can be estimated if dilution is known. As told
earlier, dilution is based upon the welding process being used. For SMAW, dilution is almost 30%.
Resultant composition is measured for each critical element based upon the dilution percentage.
h the metals being joined and the
, Chromium c
Dealing with dissimilar welding requires good knowledge of materials being joined and the
critical issues associated with their welding. Typical guidelines have been provided within this
irements should also be considered
requirements should be followed for the
material requiring high temperature and holding time. Filler metal selection should be made
resultant weld composition
should suit the service conditions. These guidelines should be used only for getting a procedure
Info: [email protected]@engineeringpulse.co.uk
For dissimilar welding, resultant weld composition can be estimated if dilution is known. As told
earlier, dilution is based upon the welding process being used. For SMAW, dilution is almost 30%.
Resultant composition is measured for each critical element based upon the dilution percentage.
h the metals being joined and the filler metal
composition
Dealing with dissimilar welding requires good knowledge of materials being joined and the
critical issues associated with their welding. Typical guidelines have been provided within this
irements should also be considered
should be followed for the
material requiring high temperature and holding time. Filler metal selection should be made
weld composition which
should suit the service conditions. These guidelines should be used only for getting a procedure
[email protected]@engineeringpulse.co.uk
For dissimilar welding, resultant weld composition can be estimated if dilution is known. As told
earlier, dilution is based upon the welding process being used. For SMAW, dilution is almost 30%.
Resultant composition is measured for each critical element based upon the dilution percentage.
filler metal
omposition in
Dealing with dissimilar welding requires good knowledge of materials being joined and the
critical issues associated with their welding. Typical guidelines have been provided within this
irements should also be considered
should be followed for the
material requiring high temperature and holding time. Filler metal selection should be made
which
should suit the service conditions. These guidelines should be used only for getting a procedure
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