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ASME P Material Numbers

This is a general guide ASME P numbers and their

equivalent EN288 groupings. Groups referred to in the

Base Metal column are ASME sub groups. EN288

material groups are included for comparison only.

http://www.twi.co.uk/technical-knowledge/faqs/material-faqs/faq-can-asme-ix-p-numbers-be-applied-to-non-asme-material/

Issues on non ASME material:

P-Numbers- Fion Zhang/ Charlie Chong


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P-NUMBERSASME Section IX has assigned P-Numbers for base materials used under the

ASME Code to reduce the number of required welding and brazing procedure

qualifications (see ASME Section IX Table QW/QB-422 and Appendix D).

For ferrous base materials that have specified impact test requirements, Group

Numbers have also been assigned within P-Numbers.

These assignments are based on comparable base material characteristics, such

as composition, weldability, brazeability, and mechanical properties. These

assignments do not mean that base materials may be substituted for a basematerial that was used in the qualification test without consideration of

compatibility from a standpoint of metallurgical properties, post weld heat

treatment, design, mechanical properties, and service requirements. Where notch

toughness is a factor, it is considered that the base materials meet the specific

requirements. The structure of P-Number assignments is based on the following:

http://engstandards.lanl.gov/esm/welding/vol1/GWS%201-07-Att.2-R1.pdf



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P No. 117P No. 61 and P No. 62Zirconium and zirconium-

based alloys

P No. 115P No. 51 through P No. 53Titanium and titanium-

based alloys

P No. 110 through P

No. 112

P No. 41 through P No. 47Nickel and nickel-based

alloys

P No. 107 and P No.

108

P No. 31 through P No. 35Copper and copper-based

alloys

P No. 104 and P No.

105

P No. 21 through P No. 25Aluminum and aluminum-

based alloys

P No. 101 through P

No. 103

P No.1 through P No. 11,

including P No. 5A, 5B,

and 5C

Steel and steel alloys

BrazingWeldingBase Material

P Number Summary:



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5 Sub Groups:- Chrome Molybdenum vanadium65C

2 Sub Groups:- Typically 5 Cr Mo and 9 Cr 1 Mo.55B

Typically 2 Cr 1Mo55A

2 Sub Groups:- Typically 1 Cr Mo54

3 Sub Groups:- Typically Mo and Cr Mo43

Not Used-2

Carbon Manganese Steels, 4 Sub Groups

Group 1 up to approx 65 ksi

Group 2 Approx 70ksi

Group 3 Approx 80ksi

Group 4 ?

11

Base MetalEN288ASME P No.

Steel and Steel Alloy: C-Mn / Cr-Mo Steel



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Austenitic Stainless Steels, 4 Sub groups

Group1 Typically Grades 304, 316, 347

Group 2 Typically Grades 309, 310

Group 3 High manganese grades

Group 4 Typically 254 SMO type steels

98

Ferritic Stainless Steels Typically Grade 40987

6 Sub Groups:- Martensitic Stainless Steels TypicallyGrade 410

86

Steel and Steel Alloy: Stainless Steel



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10 Sub Groups:-Mixed bag of high strength low alloy

steels.?11B


Not Used-12 to 20

Mixed bag of high strength low alloy steels.?11 A Groups 2 to 5

9 Nickel Steels711A Group 1

Typically 26 Chrome one Molybdenum?10J

Duplex and Super Duplex Grades 31803, 327501010 H

Mixed bag of low alloy steels, 10G 36 Nickel Steel?10A,B,C,F,G

Typically two to four percent Nickel Steels79A, B, C

Steel and Steel Alloy: Ferrous Based-Duplex/Ni/Cr-Mo/HSLA



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Not used26 to 30

Aluminum Magnesium Manganese Typically 5083,

508622b25

Not Used-24

Aluminum Magnesium Silicone Grade 60002323

Aluminum Magnesium Grade 500022a22

Pure Aluminum2121



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Not Used36 to 40

Copper Aluminum35

Copper Nickel34

Copper Silicone33

Brass32

Pure Copper31



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Nickel Copper:- Monel 50042

Pure Nickel41


Not Used47 to 50

Nickel Chrome Tungsten47

Nickel Chrome Silicone46

Nickel Chrome :- Incoloy 800, 82545

Nickel Molybdenum:- Hastelloy C22, C27644

Nickel Chrome Ferrite:- Inconel43

http://engstandards.lanl.gov/ESM_Chapters.shtml

http://www.rcramer.com/shop/asme_pnumbers.shtml

http://www.gowelding.com/wp/pnumbers.htm

http://www.gowelding.com/wp/pnumbers.htm

http://engstandards.lanl.gov/ESM_Chapters.shtml



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Zirconium Alloys61, 62

Titanium Alloys51, 52, 53



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