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!

More stainless steel knowledge: What Is Stainless Steel?