effect of various elements on ss
TRANSCRIPT
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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"
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*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 *
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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
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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
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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)
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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=
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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"
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