Effect of Various Elements on Ss

7/26/2019 Effect of Various Elements on Ss

1/24

EFFECT OF VARIOUS ELEMENTS ON SS

The corrosion, heat resistance and mechanical properties are all affected ! the chemical composition of the

stainless steel" As the composition of the steel is #aried, so are the properties" The ma$or allo!in% elements of

stainless steel incl&de'

Chromium

(" Forms a passi#e s&rface film to ma)e stainless steel resistant to corrosion"

*" Increases the scalin% resistance, tensile stren%th and +ear resistance"

Manganese

(" Impro#es hot+or)in% properties"

*" Up to *- has no effect on stren%th, d&ctilit! and to&%hness"

." Ao#e *- increases !ield stren%th and tensile stren%th /as in the *0( %rade1"

2" Important as a partial replacement of nic)el in the *0( %rade"

3" Staili4es the a&stenitic str&ct&re"

Molybdenum

(" Increases creep resistance5 stren%th at hi%h temperat&res5 and corrosion resistance, partic&larl! in

s&lfite, s&lfate, acetic acid and acetate sol&tions and in a salt+ater atmosphere"

*" E6pands ran%e of passi#it! and co&nteracts tendenc! to pit"

Nickel

(" Staili4es the a&stenitic str&ct&re"

*" Increases hi%htemperat&re stren%th5 d&ctilit!, +hich ma)es stainless steel easier to form5 and corrosion

resistance, partic&larl! in ind&strial and marine atmospheres and the chemical, food and te6tileprocessin% ind&stries"

Silicon

(" Increases scalin% resistance ! formin% a ti%ht initial scale that +ill +ithstand c!clic temperat&re

chan%es5 also sli%htl! increases tensile stren%th and hardness"

*" Resists car&ri4in% at hi%h temperat&res"

." 7hen (- or more, impro#es resistance to stron% s&lf&ric acid &t offers little impro#ement for dil&tion

and is &nfa#orale in nitricacid ser#ice"

7/26/2019 Effect of Various Elements on Ss

2/24

*Note: Ductility decreases as silicon content increases.

Sulfur Phosphorous Selenium

(" Increases machinailit!"

*" 8ecreases d&ctilit! and trans#erse tensile stren%th"

Titanium Columbium Tantalum

(" 9re#ents inter%ran&lar corrosion ! staili4in% the caron as titani&m or col&mi&m carides"

*" 9rod&ces finer %rain si4e"

." Red&ces stretcher strains from dra+in% and formin% ! their addition to t!pe 2.0"

201 Stainless Steel Strip CoilT!pe 201 stainless steel strip coil/UNS S *0(001 is a lo+ nic)el, hi%h+or) hardenin%,

a&stenitic chromi&mnic)elman%anese stainless steel that +as de#eloped to conser#e

nic)el" It does not harden +ith heat treatment &t can e +or) hardened to hi%h tensile

stren%ths" This allo! is also often polished for cosmetic applications"

201 Stainless Steel SpecificationsASTM A*20 for annealed condition

ASTM A::: for tempered material;

Composition per !STM !2"0

Caron

Man%anese

9hosphor&s

S&lf&r

Silicon

Chromi&m

Nic)el

Nitro%en

Mol!den&m

Mechanical Properties (Annealed, Per ASTM A240)

UTS

Elon%ation - in *

7/26/2019 Effect of Various Elements on Ss

3/24

Composition per !STM !2"0

Roc)+ell =ardness

* Tempered mechanical properties are available upon request.

201 Stainless Steel !pplications#itchen$are

9ots

9ans

Flat+are

Co&nters

Sin)s

Appliance components

!utomoti%e

Trim

Moldin%s

7iper parts

Fastener parts

!ppliance

8ish+ashers

O#ens

Refri%erators

&ard$are

=in%es

8oors

Frames

Roll formed sections

7/26/2019 Effect of Various Elements on Ss

4/24

Sprin% clips

'ood processing

Vario&s e>&ipment incl&din% con#e!or elts

Magnetic properties*0( stainless steel flat rolled coil is nonma%netic in the annealed condition &t ecomes

ma%netic +hen cold+or)ed" In some cases, *0( ma! e s&stit&ted for other hi%her nic)el

content allo!s"

'ormingT!pe *0( stainless steel is formale to most shapes &t +ill +or)harden disallo+in% the

most se#ere formin% operations &nless annealed prior to formin%"

301 Stainless Steel Strip CoilT!pe (01/UNS S .0(001 is an a&stenitic chromi&mnic)el strip coil stainless steelthat can

attain hi%h tensile stren%th and d&ctilit! ! cold+or)in%"

(01 Stainless Steel SpecificationsASTM A*20 for annealed condition

ASTM A::: for tempered material;

Composition per !STM !2"0

Caron

Man%anese

9hosphor&s

S&lf&r

Silicon

Chromi&m

Nic)el

Nitro%en

Mol!den&m

Mechanical Properties (Annealed, Per ASTM A240)

UTS

Elon%ation - in *&ire intermediate annealin% or hi%her nic)el content"

301 Stainless Steel Full HardStainless Sales has stoc) in (01 'ull &ardto ASTM A:::@ AMS 33( flatrolled stainless

steel"

(01 'ull &ard Stainless SteelSpecifications

Slit to !o&r desired +idth"

Slit +idths from (@2< to :0&ire reannealin% after formin% and

dra+in%"

409 Stainless Steel Rolled Coil

T!pe "08/UNS S20001 is a ferritic rolled coil stainless steelthat has a %ood cominationof heat resistance and corrosion resistance" This allo! also achie#es %ood d&ctilit! and is

&sed in some deep dra+in% applications"

20 stainless steel rolled coil is &sed in se#eral applications, and is partic&larl! pre#alent in

the a&tomoti#e ind&str!"

"08 Stainless Steel 9olled CoilSpecifications

ASTM A*20 for annealed conditionASTM A::: for tempered material;

Composition per !STM !2"0

Caron

Man%anese

9hosphor&s

S&lf&r

Silicon

7/26/2019 Effect of Various Elements on Ss

17/24

Composition per !STM !2"0

Chromi&m

Nic)el

Nitro%en

Mol!den&m

Mechanical Properties (Annealed, Per ASTM A240)

UTS

Elon%ation - in *&ire some corrosion

resistance and hi%h mechanical properties"

"10 Stainless Steel SpecificationsASTM A*20 for annealed condition

ASTM A::: for tempered material;

Composition per !STM !2"0

Caron

Man%anese

9hosphor&s

S&lf&r

Silicon

Chromi&m

Nic)el

Nitro%en

Mol!den&m

Mechanical Properties (Annealed, Per ASTM A240)

7/26/2019 Effect of Various Elements on Ss

20/24

Composition per !STM !2"0

UTS

Elon%ation - in *&ested"

o 2-

This d&ll finish is achie#ed ! coldrollin%, heattreatin% K pic)lin%" It is the

standard finish for2., 20,2.: and 22("

o 2=

7/26/2019 Effect of Various Elements on Ss

24/24

This mill finish is prod&ced the same +a! as *8, &t a final li%ht rollin% pass

%i#es the s&rface a smooth, reflecti#e %ra! sheen" It is the standard finish

for*0(,.0(, .02, .02Land .(:L"

=! ,=right !nnealed/

This ri%ht, shin! finish is prod&ced ! annealin% in an o6!%enfree atmospheric

condition follo+in% coldrollin% +ith hi%hl! polished rolls" The de%ree of ri%htness

can #ar! dependin% on the %rade, %a&%e and annealin% conditions" Common %rades

of HA material are .02and2.0" 7hen &!in% a HA, e s&re to specif! its end&se"

This information is critical to ens&rin% that !o& recei#e the est ri%ht s&rface for !o&r

application" HA material is a#ailale onl! &p to ao&t "03 thic)" 8&e to the process,

a li%ht %a&%e HA material ma! e ri%hter than (: %a&%e HA"