NOMINAL COMPOSITION OF SOME COMMON GRADES OF STAINLESS STEEL

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

Notes

 1. 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.

 2. The % content is a maximum unless a compositional range is given.

3. 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    


4. Only the primary alloying elements (C, Cr, Ni, Mo and N) are individually listed in the table.
5. 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".
6. The % content of any other alloying elements that are contained in some of the stainless steels is listed under "% Other".
7. 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
1.4372
S20100
X12CrMnNiN 17-7-5
0.15
0.15
16.0-18.0
16.0-18.0
3.5-5.5
3.5-5.5
-
-
0.25
0.05-0.25
5.5-7.5 Mn
5.5-7.5 Mn
201L
1.4371
S20103
X2CrMnNiN 17-7-5
0.03
0.03
16.0-17.0
16.0-18.0
3.5-3.5
3.5-5.5
-
-
0.25
0.15-0.25
5.5-7.5 Mn
6.0-8.0 Mn
202
1.4373
S20200
X12CrMnNiN 18-9-5
0.15
0.15
17.0-19.0
17.0-19.0
4.0-6.0
4.0-6.0
-
-
0.25
0.05-0.25
7.5-10.0 Mn
7.5-10.5 Mn
CROMANITE™ 0.08 18.0-20.0 1.0 - 0.4-0.6 9.5-11.5 Mn
301
1.4310
S30100
X10CrNi 18-8
0.15
0.05 - 0.15
16.0-18.0
16.0-19.0
6.0-8.0
6.0-9.5
-
0.80
0.10
0.11
-
-
1.4318 X2CrNi 18-7 0.03 16.5-18.5 6.0-8.0 - 0.10-0.20 -
303

1.4305
S30300

X8CrNiS 18-9
0.15

0.10
17.0-19.0

17.0-19.0
8.0-10.0

8.0-10.0
-

-
-

0.11
>0.15 S
(Free machining properties)
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
1.4301
S30400
X5CrNi 18-10
0.08
0.07
18.0-20.0
17.0-19.5
8.0-10.5
8.0-10.5
-
-
0.10
0.11
-
-
304L
1.4306
S30403
X2CrNi 19-11
0.03
0.03
18.0-20.0
18.0-20.0
10.0-12.0
10.0-12.0
-
-
0.10
0.11
-
-
304LN
1.4311
S30453
X2CrNiN 18-10
0.03
0.03

18.0-20.0
17.0-19.5

8.0-12.0
8.5-11.5
-
-
0.10-0.16
0.12-0.22
-
-
304H
1.4948
S30409
X6CrNi 18-10
0.04 - 0.10
0.04 - 0.08
18.0-20.0
17.0-19.0
8.0-10.5
8.0-11.0
-
-
-
0.11
-
-
305
1.4303
S30500
X4CrNi 18-12
0.12
0.06
17.0-19.0
17.0-19.0
10.5-13.0
11.0-13.0
-
-
-
0.11
-
-
309
1.4828
S30900
X15CrNiSi 20-12
0.20
0.20
22.0-24.0
19.0-21.0
12.0-15.0
11.0-13.0
-
-
-
0.11
-
1.5-2.0 Si
309S
1.4833
S30908
X12CrNi 23-13
0.08
0.15
22.0-24.0
22.0-24.0
12.0-15.0
12.0-14.0
-
-
-
0.11
-
-
310
1.4841
S31000
X15CrNiSi 25-21
0.25
0.20
24.0-26.0
24.0-26.0
19.0-22.0
19.0-22.0
-
-
-
0.11
1.5 Si
1.5-2.5 Si
310S
1.4845
S31008
X8CrNi 25-21
0.08
0.10
24.0-26.0
24.0-26.0
19.0-22.0
19.0-22.0
-
-
-
0.11
1.5Si
1.5Si
310MoLN
1.4466
S31050
X1CrNiMoN 25-22-2
0.02
0.02
24.0-26.0
24.0-26.0
20.5-23.5
21.0-23.0
1.6-2.6
2.0-2.5
0.09-0.15
0.10-0.16
-
-
*253MA
1.4835
S30815 0.12 20.0 10.0 0.12 1.4 Si, Ce
316
1.4401
1.4436
S31600
X5CrNiMo 17-12-2
X3CrNiMo 17-13-3
0.08
0.07
0.05
16.0-18.0
16.5-18.5
16.5-18.5
10.0-14.0
10.0-13.0
10.5-13.0
2.0-3.0
2.0-2.5
2.5-3.0
0.10
0.11
0.11
-
-
-
316L
1.4404
1.4432
1.4435
S31603
X2CrNiMo 17-12-2
X2CrNiMo 17-12-3
X2CrNiMo 18-14-3
0.03
0.03
0.03
0.03
16.0-18.0
16.5-18.5
16.5-18.5
17.0-19.0
10.0-14.0
10.0-13.0
10.5-13.0
12.5-15.0
2.0-3.0
2.0-2.5
2.5-3.0
2.5-3.0
0.10
0.11
0.11
0.11
-
-
-
-
316LN
1.4406
1.4429
S31653
X2CrNiMoN 17-11-2
X2CrNiMoN 17-13-3
0.03
0.03
0.03
16.0-18.0
16.5-18.5
16.5-18.5
10.0-14.0
10.0-12.0
11.0-14.0
2.0-3.0
2.0-2.5
2.5-3.0
0.10-0.16
0.12-0.22
0.12-0.22
-
-
-
316Ti
1.4571
S31635
X6CrNiMoTi 17-12-2
0.08
0.08
16.0-18.0
16.5-18.5
10.0-14.0
10.5-13.5
2.0-3.0
2.0-2.5
0.10
-
(5x[%C+%N])-0.7 Ti
(5x%C)-0.7 Ti
316Cb
1.4580
S31640
X6CrNiMoNb 17-12-2
0.08
0.08
16.0-18.0
16.5-18.5
10.0-14.0
10.5-13.5
2.0-3.0
2.0-2.5
-
-
(10x%C)-1.1 Cb
(10x%C)-1.0 Nb
317L
1.4438
S31703
X2CrNiMo 18-15-4
0.03
0.03
18.0-20.0
17.5-19.5
11.0-15.0
13.0-16.0
3.0-4.0
3.0-4.0
0.10
0.11
-
-
~ ~ ~
1.4439
S31726
X2CrNiMoN 17-13-5
0.03
0.03
17.0-20.0
16.5-18.5
13.5-17.5
12.5-14.5
4.0-5.0
4.0-5.0
0.10-0.20
0.12-0.22
-
-
317LN
1.4434
S31753
X2CrNiMoN 18-12-4
0.03
0.03
18.0-20.0
16.5-19.5
11.0-15.0
10.5-14.0
3.0-4.0
3.0-4.0
0.10-0.22
0.10-0.20
-
-
321
1.4541
S32100
X6CrNiTi 18-10
0.08
0.08
17.0-19.0
17.0-19.0
9.0-12.0
9.0-12.0
-
-
0.10
-
(5x[%C+%N])-0.7 Ti
(5x%C)-0.7 Ti
347
1.4550
S34700
X6CrNiNb 18-10
0.08
0.08
17.0-19.0
17.0-19.0
9.0-13.0
9.0-12.0
-
-
-
-
(10x%C)-1.0 Cb
(10x%C)-1.0 Nb
*254 SMo
1.4547
S31254 0.02 19.5 17.5 6.0 0.18 0.5 Cu
~ ~ ~
1.4539
SN08904
X1NiCrMoCu 25-20-5
0.02
0.02
19.0-23.0
19.0-21.0
23.0-28.0
24.0-26.0
4.0-5.0
4.0-5.0
0.10
0.15
1.0-2.0 Cu
1.2-2.0 Cu
Typical similar proprietary grades:- 904L ~ Cronifer 1925LC ~ 2RK65 ~ Uranus B6
~ ~ ~
1.4529
N08925/6
X1NiCrMoCuN 25-20-7
0.02
0.02
19.0-21.0
19.0-21.0
24.0-26.0
24.0-26.0
6.0-7.0
6.0-7.0
0.15-0.25
0.15-0.25
0.5-1.5 Cu
0.5-1.5 Cu
Typical similar proprietary grades:- Cronifer 1925hMo ~ 25-6Mo ~ Uranus B26
~ ~ ~
1.4563
N08028
X1NiCrMoCu 31-27-4
0.03
0.02
26.0-28.0
26.0-28.0
29.5-32.5
30.0-32.0
3.0-4.0
3.0-4.0
-
0.11
0.6-1.4 Cu
0.7-1.5 Cu
Typical similar proprietary grades:- Nicrofer 3127LC ~ Sanicro 28
~ ~ ~
2.4660
N08020
NiCr 20 CuMo
0.07
0.05
19.0-21.0
19.0-21.0
32.0-38.0
36.0-39.0
2.0-3.0
2.0-3.0
-
-
(8x%C)-1.0 Cb & 3.0-4.0 Cu
(8x%C)-1.0 Nb & 3.0-4.0 Cu
Typical similar proprietary grades:- Alloy 20Cb3 ~ Nicrofer 3620Nb ~ Inco alloy 20
~ ~ ~
2.4858
N08825
NiCr 21 Mo
0.05
0.025
19.5-23.5
19.5-23.5
38.0-46.0
38.0-46.0
2.5-3.5
2.5-3.5
-
-
0.6-1.2 Ti & 1.5-3.0 Cu & 0.20 Al
0.6-1.2 Ti & 1.5-3.0 Cu & 0.20 Al
Typical similar proprietary grades:- Incoloy 825 ~ Nicrofer 4221
~ ~ ~
1.4864
N08330 & N08332
X12NiCrSi 35-16
0.10
0.15
17.0-20.0
15.0-17.0
34.0-37.0
33.0-37.0
-
-
-
0.11
0.75-1.50 Si & 1.0 Cu
1.0-2.0 Si
Typical similar proprietary grades:- Incoloy DS ~ Nicrofer 3718
~ ~ ~ N08800 & N08811 0.10 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™
1.4003

X2CrNi 12
0.03
0.03
11.0-12.0
10.5-12.5
1.5
0.3-1.0
-
-
0.03
0.03
0.6Ti
-
~ ~ ~
1.4512
S40910
X2CrTi 12
0.03
0.03
10.5-11.7
10.5-12.5
0.5
-
-
-
0.03
-
(6x[%C+%N]}-0.5 Ti & 0.17 Cb
(6x[%C+%N])-0.65 Ti
430
1.4016
S43000
X6Cr 17
0.12
0.08
16.0-18.0
16.0-18.0
0.75
-
-
-
-
-
1.4509 X2CrTiNb 18 0.03 17.5-18.5 - - 0.045 0.10-0.60 Ti &(0.3+[3x%C])-1.0 Nb
439
1.4510
S43035
X3CrTi 17
0.07
0.05
17.0-19.0
16.0-18.0
0.50
-
-
-
0.04
-
(0.2+4x[%C+%N])-1.1 Ti & 0.15Al
(0.15+4x[%C+%N])-0.80 Ti
444
1.4521
S44400
X2CrMoTi 18-2
0.025
0.025
17.5-19.5
17.0-20.0
1.0
-
1.8-2.5
1.8-2.5
0.035
0.03
(0.20+4x[%C+%N])-0.80 Ti+Cb
(0.15+4x[%C+%N])-0.8 Ti
446
1.4762
S44600
X10CrAISi25
0.20
0.12
23.0-27.0
23.0-26.0
0.75
-
-
-
0.25
-

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
1.4006
S41000
X12Cr 13
0.15
0.08-0.15
11.5-13.5
11.5-13.5
-
0.75
-
-
-
-
-
-
416
1.4005
S41600
X12CrS 13
0.15
0.08-0.15
12.0-14.0
12.0-14.0
-
-
-
0.60
-
-
>0.15 S (Free machining properties)
0.15-0.35 S (Free machining properties)
420
1.4021
S42000
X20Cr 13
>0.15
0.16-0.25
12.0-14.0
12.0-14.0
-
-
-
-
-
-
-
-
431
1.4057
S43100
X17CrNi 16-2
0.20
0.12-0.22
15.0-17.0
15.0-17.0
1.25-2.50
1.5-2.5
-
-
-
-
-
-
440A S44002 0.60-0.75 16.0-18.0 - 0.75 - -
440B
1.4112
S44003
X90CrMoV 18
0.75-0.95
0.85-0.95
16.0-18.0
17.0-19.0
-
-
0.75
0.9-1.3
-
-
-
0.07-0.12 V
440C
1.4125
S44004
X105CrMo 17
0.95-1.20
0.95-1.20
16.0-18.0
16.0-18.0
-
-
0.75
0.4-0.8
-
-
-
-

Duplex Stainless Steels

Grade Number UNS Number
Grade Designation
%C %Cr %Ni %Mo %N %Other
2304
1.4362
S32304
X12CrNiN 23-4
0.03
0.03
21.5-24.5
22.0-24.0
3.0-5.5
3.5-5.5
0.1-0.6
0.1-0.6
0.05-0.20
0.05-0.20
0.05-0.6 Cu
0.1-0.6 Cu
Typical similar proprietary grades: SAF2304 ~ 2304
~ ~ ~
2205
1.4462
S31803
S32205
X2CrNiMoN 22-5-3
0.03
0.03
0.03
21.0-23.0
22.0-23.0
21.0-23.0
4.5-6.5
4.5-6.5
4.5-6.5
2.5-3.5
3.0-3.5
2.5-3.5
0.08-0.20
0.14-0.20
0.10-0.22
-
-
-
Typical similar proprietary grades: SAF2205 ~ 2205 ~ Uranus 45N
2507
1.4410
S32750
X2CrNiMoN 25-7-4
0.03
0.03
24.0-26.0
24.0-26.0
6.0-8.0
6.0-8.0
3.0-5.0
3.0-4.5
0.24-0.35
0.20-0.35
-
-
Typical similar proprietary grades: SAF2507 ~ 2507 ~ Uranus 47N
*LDX 2101
1.4162
S32101 0.03 21.5 1.5 0.3 0.22 5.0 Mn
-
*LDX 2404
1.4662
S82441 0.02 24 3.6 1.6 0.27 3.0 Mn
-
*DX 2202
1.4062
S32202
X2CrNiN 22-2
0.025 23 2.5 <0.30 0.20 1.3 Mn
-
255
1.4507
S32550
X2CrNiMoCuN 25-6-3
0.04
0.03
24.0-27.0
24.0-26.0
4.5-6.5
5.5-7.5
2.9-3.9
2.7-4.0
0.10-0.25
0.15-0.30
1.5-2.5 Cu
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
1.4542
S17400
X5CrNiCuNb 16-4
0.07
0.07
15.0-17.5
15.0-17.0
3.0-5.0
3.0-5.0
-
0.6
-
-
3.0-5.0 Cu & 0.1-0.5 Cb
3.0-5.0 Cu & (5x%C)-0.45 Nb
Typical similar proprietary grade: 17-4PH
631
1.4568
S17700
X7CrNiAl 17-7
0.09
0.09
16.0-18.0
16.0-18.0
6.5-7.75
6.5-7.8
-
-
-
-
0.7-1.5 Al
0.7-1.5 Al
Typical similar proprietary grade: 17-7PH
632
1.4532
S15700
X8CrNiMoAl 15-7-2
0.09
0.10
14.0-16.0
14.0-16.0
6.5-7.75
6.5-7.8
2.0-3.0
2.0-3.0
-
-
0.7-1.5 Al
0.7-1.5 Al
Typical similar proprietary grade: PH 15-7Mo

* Typical Composition %