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Stainless Steel Codes & Grades

Stainless steel is with a chromium content of at least 10.5% and a maximum carbon content of no more than 1.2%. It is resistant to weak corrosive media such as air, steam, and water. Also, it is resistant to chemical corrosive media, such as acid, alkali, salt, etc. Due to the different compositions, there are different grades. The standards of different countries and areas are also different. Let’s review the stainless steel codes.

Stainless Steel Codes

China Japan USA Korea UN India Australia Taiwan China
GB(New) JIS ASTM UNS KS BS EN IS IS CNS
Austenitic Stainless Steel
12Cr17Mn6Ni5N SUS201 201 S20100 STS201 1.4372 10Cr17Mn6Ni4N20 201-2 201
12Cr18Mn9Ni5N SUS202 202 S20200 STS202 1.4373 202
12Cr17Ni7 SUS301 301 S30100 STS301 1.4319 10Cr17Ni7 301 301
06Cr19Ni10 SUS304 304 S30400 STS304 1.4301 07Cr18Ni9 304 304
022Cr19Ni10 SUS304L 304L S30403 STS304L 1.4306 02Cr18Ni11 304L 304L
06Cr19Ni10N SUS304N1 304N S30451 STS304N1 1.4315 304N1 304N1
06Cr19Ni9NbN SUS304N2 XM21 S30452 STS304N2 304N2 304N2
022Cr19Ni10N SUS304LN 304LN S30453 STS304LN 304LN 304LN
10Cr18Ni12 SUS305 305 S30500 STS305 1.4303 305 305
06Cr23Ni13 SUS309S 309S S30908 STS309S 1.4833 309S 309S
06Cr25Ni20 SUS310S 310S S31008 STS310S 1.4845 310S 310S
06Cr17Ni12Mo2 SUS316 316 S31600 STS316 1.4401 04Cr17Ni12Mo2 316 316
06Cr17Ni12Mo2Ti SUS316Ti 316Ti S31635 1.4571 04Cr17Ni12MoTi20 316Ti 316Ti
022Cr17Ni12Mo2 SUS316L 316L S31603 STS316L 1.4404 ~02Cr17Ni12Mo2 316L 316L
06Cr17Ni12Mo2N SUS316N 316N S31651 STS316N 316N 316N
022Cr17Ni13Mo2N SUS316LN 316LN S31653 STS316LN 1.4429 316LN 316LN
06Cr18Ni12Mo2Cu2 SUS316J1 STS316J1 316J1 316J1
022Cr18Ni14Mo2Cu2 SUS316J1L STS316J1L 316J1L
06Cr19Ni13Mo3 SUS317 317 S31700 STS317 317 317
022Cr19Ni13Mo3 SUS317L 317L S31703 STS317L 1.4438 317L 317L
06Cr18Ni11Ti SUS321 321 S32100 STS321 1.4541 04Cr18Ni10Ti20 321 321
06Cr18Ni11Nb SUS347 347 S34700 STS347 1.455 04Cr18Ni10Nb40 347 347
Austenitic Ferritic Stainless Steel (Duplex Stainless Steel)
SUS329J1 329 S32900 STS329J1 1.4477 329J1 329J1
022Cr19Ni5Mo3Si2N SUS329J3L S31803 STS329J3L 1.4462 329J3L 329J3L
0Cr18Ni10Ti ferritic stainless steel
06Crl3AI SUS405 405 S40500 STS405 1.4002 04Cr13 405 405
022Cr11Ti SUH409 409 S40900 STS409 1.4512 409L 409L
022Cr12 SUS410L STS410L 410L 410L
10Cr17 SUS430 430 S43000 STS430 1.4016 05Cr17 430 430
10Cr17Mo SUS434 434 S43400 STS434 1.4113 434 434
022Cr18NbTi S43940 1.4509 439 439
019Cr19Mo2NbTi SUS444 444 S44400 STS444 1.4521 444 444
Martensier Stainless Steel
12Cr12 SUS403 403 S40300 STS403 403 403
12Cr13 SUS410 410 S41000 STS410 1.4006 12Cr13 410 410
20Cr13 SUS420J1 420 S42000 STS420J1 1.4021 20Cr13 420 420J1
30Cr13 SUS420J2 STS420J2 1.4028 30 Cr13 420J2 420J2
68Cr17 SUS440A 440A S44002 STS440A 440A 440A

Conclusion

Here are the stainless steel codes and grades according to the standards of different countries and areas. In fact, there are more than one hundred kinds of stainless steel. And each stainless steel has good performance in its specific applications. It is important to choose the correct steel grade according to the use purpose and use environment. For example, Martensitic stainless steel has high strength, hardness, and wear resistance because of its high carbon content. But its corrosion resistance, plasticity, and weldability are poor. Therefore, it is used as springs, steam turbine blades, hydraulic press valves, etc. If you want to know more details, please feel free to contact us!

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