Nominal Composition Of Some Common Grades Of Stainless Steel

NOTES

Similar grades (on a basis of composition only) from the ASTM and EN Standards are grouped together.

Nominal compositions are given in this table. These must not be used for specification purposes. For the exact composition, reference must be made to the appropriate specification.
The % content is a maximum unless a compositional range is given.
Common Elements
- Al = Aluminium
- C = Carbon
- Cr = Chromium
- Cu = Copper
- Mn = Manganese
- Mo = Molybdenum
- N = Nitrogen
- Nb = Niobium (as Cb = Columbium in American Specifications)
- Ni = Nickel
- P = Phosphorus
- S = Sulphur
- Se = Selenium
- Si = Silicon
- Ti = Titanium
- V = Vanadium
Only the primary alloying elements (C, Cr, Ni, Mo and N) are individually listed in the table.
All stainless steels contain Si, Mn, P and S. These are controlled to maximum contents of typically 0.75% or 1.0% Si, 2.0% Mn, 0.015% S, 0.045%P. If these elements are intentionally added as alloying elements the higher % content is listed under \"% Other\".
The % content of any other alloying elements that are contained in some of the stainless steels is listed under \"% Other\".
Typical Proprietary Grades (which are commonly referred to in South Africa) are given for the purpose of example only. The inclusion of any such Proprietary Grade must not be interpreted as an endorsement or recommendation; and vice versa, the exclusion of any such Proprietary Grade must not be interpreted as a non-recommendation.

Austenitic Stainless Steels and Austenitic Stainless Alloys
Grade Number	UNS Number Grade Designation	% C	% Cr	% Ni	% Mo	% N	% Other
201	S20100	0.15	16.0-18.0	3.5-5.5	-	0.25	5.5-7.5 Mn
1.4372	X12CrMnNiN 17-7-5	0.15	16.0-18.0	3.5-5.5	-	0.05-0.25	5.5-7.5 Mn
201L	S20103	0.03	16.0-17.0	3.5-3.5	-	0.25	5.5-7.5 Mn
1.4371	X2CrMnNiN 17-7-5	0.03	16.0-18.0	3.5-5.5	-	0.15-0.25	6.0-8.0 Mn
202	S20200	0.15	17.0-19.0	4.0-6.0	-	0.25	7.5-10.0 Mn
1.4373	X12CrMnNiN 18-9-5	0.15	17.0-19.0	4.0-6.0	-	0.05-0.25	7.5-10.5 Mn
CROMANITE		0.08	18.0-20.0	1	-	0.4-0.6	9.5-11.5 Mn
301	S30100	0.15	16.0-18.0	6.0-8.0	-	0.1	-
1.431	X10CrNi 18-8	0.05 - 0.15	16.0-19.0	6.0-9.5	0.8	0.11	-
1.4318	X2CrNi 18-7	0.03	16.5-18.5	6.0-8.0	-	0.10-0.20	-
303	S30300	0.15	17.0-19.0	8.0-10.0	-	-	>0.15 S (Free machining properties)
1.4305	X8CrNiS 18-9	0.1	17.0-19.0	8.0-10.0	-	0.11	0.15-0.35 S (Free machining properties)
303Se	S30323	0.15	17.0-19.0	8.0-10.0	-	-	0.06 S & >0.15 Se (Free machining properties)
304	S30400	0.08	18.0-20.0	8.0-10.5	-	0.10	-
1.4301	X5CrNi 18-10	0.07	17.0-19.5	8.0-10.5	-	0.11	-
304L	S30403	0.03	18.0-20.0	10.0-12.0	-	0.10	-
1.4306	X2CrNi 19-11	0.03	18.0-20.0	10.0-12.0	-	0.11	-
304LN	S30453	0.03	18.0-20.0	8.0-12.0	-	0.10-0.16	-
1.4311	X2CrNiN 18-10	0.03	17.0-19.0	8.5-11.5	-	0.12-0.22	-
304H	S30409	0.04 - 0.10	18.0-20.0	8.0-10.5	-	-	-
1.4948	X6CrNi 18-10	0.04 - 0.08	17.0-19.0	8.0-11.0	-	0.11	-
305	S30500	0.12	17.0-19.0	10.5-13.0	-	-	-
1.4303	X4CrNi 18-12	0.06	17.0-19.0	11.0-13.0	-	0.11	-
309	S30900	0.2	22.0-24.0	12.0-15.0	-	-	-
1.4828	X15CrNiSi 20-12	0.2	19.0-21.0	11.0-13.0	-	0.11	1.5-2.0 Si
309S	S30908	0.08	22.0-24.0	12.0-15.0	-	-	-
1.4833	X12CrNi 23-13	0.15	22.0-24.0	12.0-14.0	-	0.11	-
310	S31000	0.25	24.0-26.0	19.0-22.0	-	-	1.5 Si
1.4841	X15CrNiSi 25-21	0.2	24.0-26.0	19.0-22.0	-	0.11	1.5-2.5 Si
310S	S31008	0.08	24.0-26.0	19.0-22.0	-	-	1.5Si
1.4845	X8CrNi 25-21	0.1	24.0-26.0	19.0-22.0	-	0.11	1.5Si
310MoLN	S31050	0.02	24.0-26.0	20.5-23.5	1.6-2.6	0.09-0.15	-
1.4466	X1CrNiMoN 25-22-2	0.02	24.0-26.0	21.0-23.0	2.0-2.5	0.10-0.16	-
*253MA	S30815	0.12	20	10		0.12	1.4 Si, Ce
1.4835
316	S31600	0.08	16.0-18.0	10.0-14.0	2.0-3.0	0.1	-
1.4401	X5CrNiMo 17-12-2	0.07	16.5-18.5	10.0-13.0	2.0-2.5	0.11	-
1.4436	X3CrNiMo 17-13-3	0.05	16.5-18.5	10.5-13.0	2.5-3.0	0.11	-
316L	S31603	0.03	16.0-18.0	10.0-14.0	2.0-3.0	0.1	-
1.4404	X2CrNiMo 17-12-2	0.03	16.5-18.5	10.0-13.0	2.0-2.5	0.11	-
1.4432	X2CrNiMo 17-12-3	0.03	16.5-18.5	10.5-13.0	2.5-3.0	0.11	-
1.4435	X2CrNiMo 18-14-3	0.03	17.0-19.0	12.5-15.0	2.5-3.0	0.11	-
316LN	S31653	0.03	16.0-18.0	10.0-14.0	2.0-3.0	0.10-0.16	-
1.4406	X2CrNiMoN 17-11-2	0.03	16.5-18.5	10.0-12.0	2.0-2.5	0.12-0.22	-
1.4429	X2CrNiMoN 17-13-3	0.03	16.5-18.5	11.0-14.0	2.5-3.0	0.12-0.22	-
316Ti	S31635	0.08	16.0-18.0	10.0-14.0	2.0-3.0	0.1	(5x[%C+%N])-0.7 Ti
1.4571	X6CrNiMoTi 17-12-2	0.08	16.5-18.5	10.5-13.5	2.0-2.5	-	(5x%C)-0.7 Ti
316Cb	S31640	0.08	16.0-18.0	10.0-14.0	2.0-3.0	-	(10x%C)-1.1 Cb
1.458	X6CrNiMoNb 17-12-2	0.08	16.5-18.5	10.5-13.5	2.0-2.5	-	(10x%C)-1.0 Nb
317L	S31703	0.03	18.0-20.0	11.0-15.0	3.0-4.0	0.1	-
1.4438	X2CrNiMo 18-15-4	0.03	17.5-19.5	13.0-16.0	3.0-4.0	0.11	-
~ ~ ~	S31726	0.03	17.0-20.0	13.5-17.5	4.0-5.0	0.10-0.20	-
1.4439	X2CrNiMoN 17-13-5	0.03	16.5-18.5	12.5-14.5	4.0-5.0	0.12-0.22	-
317LN	S31753	0.03	18.0-20.0	11.0-15.0	3.0-4.0	0.10-0.22	-
1.4434	X2CrNiMoN 18-12-4	0.03	16.5-19.5	10.5-14.0	3.0-4.0	0.10-0.20	-
321	S32100	0.08	17.0-19.0	9.0-12.0	-	0.1	(5x[%C+%N])-0.7 Ti
1.4541	X6CrNiTi 18-10	0.08	17.0-19.0	9.0-12.0	-	-	(5x%C)-0.7 Ti
347	S34700	0.08	17.0-19.0	9.0-13.0	-	-	(10x%C)-1.0 Cb
1.455	X6CrNiNb 18-10	0.08	17.0-19.0	9.0-12.0	-	-	(10x%C)-1.0 Nb
*254 SMo	S31254	0.02	19.5	17.5	6	0.18	0.5 Cu
1.4547
~ ~ ~	SN08904	0.02	19.0-23.0	23.0-28.0	4.0-5.0	0.1	1.0-2.0 Cu
1.4539	X1NiCrMoCu 25-20-5	0.02	19.0-21.0	24.0-26.0	4.0-5.0	0.15	1.2-2.0 Cu
Typical similar proprietary grades:- 904L ~ Cronifer 1925LC ~ 2RK65 ~ Uranus B6
~ ~ ~	N08925/6	0.02	19.0-21.0	24.0-26.0	6.0-7.0	0.15-0.25	0.5-1.5 Cu
1.4529	X1NiCrMoCuN 25-20-7	0.02	19.0-21.0	24.0-26.0	6.0-7.0	0.15-0.25	0.5-1.5 Cu
Typical similar proprietary grades:- Cronifer 1925hMo ~ 25-6Mo ~ Uranus B26
~ ~ ~	N08028	0.03	26.0-28.0	29.5-32.5	3.0-4.0	-	0.6-1.4 Cu
1.4563	X1NiCrMoCu 31-27-4	0.02	26.0-28.0	30.0-32.0	3.0-4.0	0.11	0.7-1.5 Cu
Typical similar proprietary grades:- Nicrofer 3127LC ~ Sanicro 28
~ ~ ~	N08020	0.07	19.0-21.0	32.0-38.0	2.0-3.0	-	(8x%C)-1.0 Cb & 3.0-4.0 Cu
2.466	NiCr 20 CuMo	0.05	19.0-21.0	36.0-39.0	2.0-3.0	-	(8x%C)-1.0 Nb & 3.0-4.0 Cu
Typical similar proprietary grades:- Alloy 20Cb3 ~ Nicrofer 3620Nb ~ Inco alloy 20
~ ~ ~	N08825	0.05	19.5-23.5	38.0-46.0	2.5-3.5	-	0.6-1.2 Ti & 1.5-3.0 Cu & 0.20 Al
Typical similar proprietary grades:- Incoloy 825 ~ Nicrofer 4221
2.4858	NiCr 21 Mo	0.025	19.5-23.5	38.0-46.0	2.5-3.5	-	0.6-1.2 Ti & 1.5-3.0 Cu & 0.20 Al
~ ~ ~	N08330 & N08332	0.1	17.0-20.0	34.0-37.0	-	-	0.75-1.50 Si & 1.0 Cu
1.4864	X12NiCrSi 35-16	0.15	15.0-17.0	33.0-37.0	-	0.11	1.0-2.0 Si
Typical similar proprietary grades:- Incoloy DS ~ Nicrofer 3718
~ ~ ~	N08800 & N08811	0.1	19.0-23.0	30.0-35.0	-	-	39.5 Fe(min) & 0.15-0.60 Ti & 0.15-0.60 Al
1.4876	X10NiCrAITi 32-21	0.12	19.0-23.0	30.0-34.0	-	-	0.15-0.60 Ti& 0.15-0.60 Al
Typical similar proprietary grades:- Incoloy 800 & 800HT ~ Nicrofer 3220& 3220H ~ Uranus 800 & 800H

* Chemical composition minimum values

Ferritic Stainless Steels
Grade Number	UNS Number Grade Designation	% C	% Cr	% Ni	% Mo	% N	% Other
3CR12™		0.03	11.0-12.0	1.5	-	0.03	0.6Ti
1.4003	X2CrNi 12	0.03	10.5-12.5	0.3-1.0	-	0.03	-
~ ~ ~	S40910	0.03	10.5-11.7	0.5	-	0.03	(6x[%C+%N]}-0.5 Ti & 0.17 Cb
1.4512	X2CrTi 12	0.03	10.5-12.5	-	-	-	(6x[%C+%N])-0.65 Ti
430	S43000	0.12	16.0-18.0	0.75	-	-
1.4016	X6Cr 17	0.08	16.0-18.0	-	-	-
1.4509	X2CrTiNb18	0.03	17.5-18.5	-	-	0.045	0.10-0.60 Ti &(0.3+[3x%C])-1.0 Nb
439	S43035	0.07	17.0-19.0	0.5	-	0.04	(0.2+4x[%C+%N])-1.1 Ti & 0.15Al
1.451	X3CrTi 17	0.05	16.0-18.0	-	-	-	(0.15+4x[%C+%N])-0.80 Ti
444	S44400	0.025	17.5-19.5	1	1.8-2.5	0.035	(0.20+4x[%C+%N])-0.80 Ti+Cb
1.4521	X2CrMoTi 18-2	0.025	17.0-20.0	-	1.8-2.5	0.03	(0.15+4x[%C+%N])-0.8 Ti
446	S44600	0.2	23.0-27.0	0.75	-	0.25
1.4762	X10CrAISi25	0.12	23.0-26.0	-	-	-	1.2-1.7 Al & 0.7-1.4 Si

Martensitic Stainless Steels
Grade Number	UNS Number Grade Designation	% C	% Cr	% Ni	% Mo	% N	% Other
410	S41000	0.15	11.5-13.5	-	-	-	-
1.4006	X12Cr 13	0.08-0.15	11.5-13.5	0.75	-	-	-
416	S41600	0.15	12.0-14.0	-	-	-	>0.15 S (Free machining properties)
1.4005	X12CrS 13	0.08-0.15	12.0-14.0	-	0.6	-	0.15-0.35 S (Free machining properties)
420	S42000	>0.15	12.0-14.0	-	-	-	-
1.4021	X20Cr 13	0.16-0.25	12.0-14.0	-	-	-	-
431	S43100	0.2	15.0-17.0	1.25-2.50	-	-	-
1.4057	X17CrNi 16-2	0.12-0.22	15.0-17.0	1.5-2.5	-	-	-
440A	S44002	0.60-0.75	16.0-18.0	-	0.75	-	-
440B	S44003	0.75-0.95	16.0-18.0	-	0.75	-	-
1.4112	X90CrMoV 18	0.85-0.95	17.0-19.0	-	0.9-1.3	-	0.07-0.12 V
440C	S44004	0.95-1.20	16.0-18.0	-	0.75	-	-
1.4125	X105CrMo 17	0.95-1.20	16.0-18.0	-	0.4-0.8	-	-

Duplex Stainless Steels
Grade Number	UNS Number Grade Designation	% C	% Cr	% Ni	% Mo	% N	% Other
2304	S32304	0.03	21.5-24.5	3.0-5.5	0.1-0.6	0.05-0.20	0.05-0.6 Cu
1.4362	X12CrNiN 23-4	0.03	22.0-24.0	3.5-5.5	0.1-0.6	0.05-0.20	0.1-0.6 Cu
Typical similar proprietary grades: SAF2304 ~ 2304
~ ~ ~	S31803	0.03	21.0-23.0	4.5-6.5	2.5-3.5	0.08-0.20	-
2205	S32205	0.03	22.0-23.0	4.5-6.5	3.0-3.5	0.14-0.20	-
1.4462	X2CrNiMoN 22-5-3	0.03	21.0-23.0	4.5-6.5	2.5-3.5	0.10-0.22	-
Typical similar proprietary grades: SAF2205 ~ 2205 ~ Uranus 45N
2507	S32750	0.03	24.0-26.0	6.0-8.0	3.0-5.0	0.24-0.35	-
1.441	X2CrNiMoN 25-7-4	0.03	24.0-26.0	6.0-8.0	3.0-4.5	0.20-0.35	-
Typical similar proprietary grades: SAF2507 ~ 2507 ~ Uranus 47N
*LDX 2101	S32101	0.03	21.5	1.5	0.3	0.22	5.0 Mn
1.4162							-
*LDX 2404	S82441	0.02	24	3.6	1.6	0.27	3.0 Mn
1.4662							-
*DX 2202	S32202	0.025	23	2.5	<0.30	0.2	1.3 Mn
1.4062	X2CrNiN 22-2						-
255	S32550	0.04	24.0-27.0	4.5-6.5	2.9-3.9	0.10-0.25	1.5-2.5 Cu
1.4507	X2CrNiMoCuN 25-6-3	0.03	24.0-26.0	5.5-7.5	2.7-4.0	0.15-0.30	1.0-2.5 Cu
Typical similar proprietary grades: Ferralium 255-3SF ~ Uranus 52N

* Typical Composition %

Precipitation Hardenable (PH) Stainless Steels
Grade Number	UNS Number Grade Designation	% C	% Cr	% Ni	% Mo	% N	% Other
630	S17400	0.07	15.0-17.5	3.0-5.0	-	-	3.0-5.0 Cu & 0.1-0.5 Cb
1.4542	X5CrNiCuNb 16-4	0.07	15.0-17.0	3.0-5.0	0.6	-	3.0-5.0 Cu & (5x%C)-0.45 Nb
Typical similar proprietary grade: 17-4PH
631	S17700	0.09	16.0-18.0	6.5-7.75	-	-	0.7-1.5 Al
1.4568	X7CrNiAl 17-7	0.09	16.0-18.0	6.5-7.8	-	-	0.7-1.5 Al
Typical similar proprietary grade: 17-7PH
632	S15700	0.09	14.0-16.0	6.5-7.75	2.0-3.0	-	0.7-1.5 Al
1.4532	X8CrNiMoAl 15-7-2	0.1	14.0-16.0	6.5-7.8	2.0-3.0	-	0.7-1.5 Al
Typical similar proprietary grade: PH 15-7Mo

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Nominal Composition Of Some Common Grades Of Stainless Steel

NOTES

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