Stainless steel, alsoknown ascorrosion-resistant steel, is
aniron-based steel alloy, containingminimum 11%chromium. Chromium
present in itprevents it from getting corroded,by forming
aself-healing film of chromiumoxide on the surface of stainless
steel.Apartfrom being corrosion resistant,it is also known for its
qualities ofhighductility, weldability and cryogenictoughness.
Stainless steel is gradedbytaking into consideration theenvironment
that it will be assigned to.Thegrading system that is mostcommonly
used for grading stainless steel is theSAESteel Grades,
designatedby the Society of Automotive Engineers (SAE), andtheUNS
Material: 304, 304L, 309, 310, 316, 316L, 321, 347, 410, 430, 904L etc.
Other standards materials are alsoavailable as your requirements.
Holeshape: round, square & rectangular, slot, hexagon, oblong, diamond
andother decorative shapes.
Different Grades of StainlessSteel
Stainless steel grades are iron alloysthat contain more than 10.5%
ofchromium. Other alloys are added to stainlesssteel to amplify its
properties.The grading is based on the metallurgicalstructure and
nature of stainlesssteel. The grades of stainless steel
arecategorized into different families onthe basis of the
properties that theydisplay.
Austenitic Stainless Steel Series100-300
The family of austenitic stainless steelare the alloys that contain
16%chromium and 6% nickel. Other elements such ascopper, titanium
or molybdenumcan be added to amplify its properties. Thecombination
of all these elementsmake it suitable for use in the work
involvinghigh corrosion resistance andhigh temperature resistance.
It is alsoeffectively resistant to atmosphericcorrosion and
corrosion by organic,oxidizing and mineral acids. It
displaysproperties like high ductility,cryogenic toughness and
weldability. This makesit possible to fabricateaustenitic stainless
steel by punching, spinning,welding, frilling, bending,etc.
It is also non-magnetic. The important austeniticgrades are the 200
series(chrome-manganese series) and the 300 series(chrome-nickel
series). The 300series is the largest manufactured stainlesssteel
type in the world. Austeniticstainless steel is mainly used in
themanufacture of cutlery, kitchen appliancesand consumer durables
and also forthe construction purposes.
Ferritic Stainless Steel
The family of ferritic stainless steelalloys has chromium content
ofmore than 10.5% and a low carbon content. Theyare plain chromium
grades,display magnetic properties and cannot be hardened.They are
not suitable forfabrication and are moderately resistant to
corrosion.They can be polished andare used for the manufacture of
automotive exhausts andsometimes for weldingapplications.
Duplex Stainless Steel 2304 and 2205
The family of duplex stainless steelalloys possesses a high
chromiumcontent of 18% to 28% and a moderate nickelcontent of 1% to
8%. They are acombination of austenitic and ferritic stainlesssteel
alloy structures andthey may also contain molybdenum, copper,
manganeseor tungsten. They displayhigh yield strength and
resistance to stresscorrosion, cracking and ionattack. The are used
in the paper and pulp,petrochemical and marineapplication
industries and in the desalination plants.
Martensitic Stainless Steel Series 400
The family of martensitic stainlesssteel are alloys having 11.5%
to18%chromium and high carbon content of 0.1% to2%. It can be
easily hardened bysubjecting it to heat, and is highly resistantto
abrasion, but it displaysless resistance to corrosion compared to
otheralloys of stainless steel. Itdisplays magnetic properties and
is used in themanufacture of surgicalinstruments, valves, knife
Please contact us todayto learn moreabout how we can provide a high
quality stainless steel solutionfor yourspecific needs.
Stainless Steel Grades Chemical Composition
|Alloy #||CR||Ni||C||Mn.Max.||Si-Max.||P.Max.||S.Max.||Other Elements|