Chemical composition of stainless steel castings to BS EN 10283
Introduction
BS EN 10283 is the material standard for stainless steel castings for corrosion resisting purposes. Martensitic, precipitation hardening, austenitic and austenitic-ferritic, (duplex), grades are included.
The standard was revised in 2019, in comparison with EN 10283:2010, the following significant technical changes were made:
— alignment with the structure of EN 1559-1:2011, Founding — Technical conditions of delivery —
Part 1: General and EN 1559-2:2014, Founding — Technical conditions of delivery — Part 2:
Additional requirements for steel castings;
— new grade, (GX20Cr14), added;
— Table A.1: welding group added.
The chemical composition of all the grades of stainless steel covered in the standard are listed.
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The data given is not intended to replace that shown in individual standards to which reference should always be made.
BS EN 10283 chemical composition table
| Designation |
Chemical composition % by mass (max unless otherwise stated) |
| Steel name |
Steel number |
C |
Si |
Mn |
P |
S |
Cr |
Mo |
Ni |
N |
Cu |
Nb1) |
W |
| Martensitic grades |
| GX12Cr12 |
1.4011 |
0.15 |
1.00 |
1.00 |
0.035 |
0.025 |
11.50/13.50 |
0.50 |
1.00 |
– |
– |
– |
– |
| GX20Cr14 |
1.4027 |
0.16/0.23 |
1.00 |
1.00 |
0.045 |
0.032 |
12.50/14.50 |
– |
1.00 |
– |
– |
– |
– |
| GX7CrNiMo12-1 |
1.4008 |
0.10 |
1.00 |
1.00 |
0.035 |
0.025 |
12.00/13.50 |
0.20/0.50 |
1.00/2.00 |
– |
– |
– |
– |
| GX4CrNi13-4 |
1.4317 |
0.06 |
1.00 |
1.00 |
0.035 |
0.025 |
12.00/13.50 |
0.70 |
3.50/5.00 |
– |
– |
– |
– |
| GX4CrNiMo16-5-1 |
1.4405 |
0.06 |
0.80 |
1.00 |
0.035 |
0.025 |
15.00/17.00 |
0.70/1.50 |
4.00/6.00 |
– |
– |
– |
– |
| GX4CrNiMo16-5-2 |
1.4411 |
0.06 |
0.80 |
1.00 |
0.035 |
0.025 |
15.00/17.00 |
1.50/2.00 |
4.00/6.00 |
– |
– |
– |
– |
| GX5CrNiCu16-4 |
1.4525 |
0.07 |
0.80 |
1.00 |
0.035 |
0.025 |
15.00/17.00 |
0.80 |
3.50/5.50 |
0.05 |
2.50/4.00 |
0.35 |
– |
| Austenitic grades |
| GX2CrNi19-11 |
1.4309 |
0.030 |
1.50 |
2.00 |
0.035 |
0.025 |
18.00/20.00 |
– |
9.00/12.00 |
0.20 |
– |
– |
– |
| GX5CrNi19-10 |
1.4308 |
0.07 |
1.50 |
1.50 |
0.040 |
0.030 |
18.00/20.00 |
– |
8.00/11.00 |
– |
– |
– |
– |
| GX5CrNiNb19-11 |
1.4552 |
0.07 |
1.50 |
1.50 |
0.040 |
0.030 |
18.00/20.00 |
– |
9.00/12.00 |
– |
– |
8xC/1.00 |
– |
| GX2CrNiMo19-11-2 |
1.4409 |
0.030 |
1.50 |
2.00 |
0.035 |
0.025 |
18.00/20.00 |
2.00/2.50 |
9.00/12.00 |
0.20 |
– |
– |
– |
| GX5CrNiMo19-11-2 |
1.4408 |
0.07 |
1.50 |
1.50 |
0.040 |
0.030 |
18.00/20.00 |
2.00/2.50 |
9.00/12.00 |
– |
– |
– |
– |
| GX5CrNiMoNb19-11-2 |
1.4581 |
0.07 |
1.50 |
1.50 |
0.040 |
0.030 |
18.00/20.00 |
2.00/2.50 |
9.00/12.00 |
– |
– |
8xC/1.00 |
– |
| GX4CrNiMoNb19-11-3 |
1.4443 |
0.05 |
1.50 |
2.00 |
0.040 |
0.030 |
18.00/20.00 |
2.50/3.00 |
10.00/13.00 |
– |
– |
– |
– |
| GX5CrNiMo19-11-3 |
1.4412 |
0.07 |
1.50 |
1.50 |
0.040 |
0.030 |
18.00/20.00 |
3.00/3.50 |
10.00/13.00 |
– |
– |
– |
– |
| GX2CrNiMoN17-13-4 |
1.4446 |
0.030 |
1.00 |
1.50 |
0.040 |
0.030 |
16.50/18.50 |
4.00/4.50 |
12.50/14.50 |
0.12/0.22 |
– |
– |
– |
| Fully austenitic grades |
| GX2NiCrMo28-20-2 |
1.4458 |
0.030 |
1.00 |
2.00 |
0.035 |
0.025 |
19.00/22.00 |
2.00/2.50 |
26.00/30.00 |
0.20 |
2.00 |
– |
– |
| GX4NiCrCuMo30-20-4 |
1.4527 |
0.06 |
1.50 |
1.50 |
0.040 |
0.030 |
19.00/22.00 |
2.00/3.00 |
27.50/30.50 |
– |
3.00/4.00 |
– |
– |
| GX2NiCrMoCu25-20-5 |
1.4584 |
0.025 |
1.00 |
2.00 |
0.035 |
0.020 |
19.00/21.00 |
4.00/5.00 |
24.00/26.00 |
0.20 |
1.00/3.00 |
– |
– |
| GX2NiCrMoN25-20-5 |
1.4416 |
0.030 |
1.00 |
1.00 |
0.035 |
0.020 |
19.00/21.00 |
4.50/5.50 |
24.00/26.00 |
0.12/0.20 |
– |
– |
– |
| GX2NiCrMoCuN29-25-5 |
1.4587 |
0.030 |
1.00 |
2.00 |
0.035 |
0.025 |
24.00/26.00 |
4.00/5.00 |
28.00/30.00 |
0.15/0.25 |
2.00/3.00 |
– |
– |
| GX2NiCrMoCuN25-20-6 |
1.4588 |
0.025 |
1.00 |
2.00 |
0.035 |
0.020 |
19.00/21.00 |
6.00/7.00 |
24.00/26.00 |
0.10/0.25 |
0.50/1.50 |
– |
– |
| GX2CrNiMoCuN20-18-6 |
1.4557 |
0.025 |
1.00 |
1.20 |
0.030 |
0.010 |
19.50/20.50 |
6.00/7.00 |
17.50/19.50 |
0.18/0.24 |
0.50/1.00 |
– |
– |
| Ferritic-austenitic grades |
| GX4CrNiMoN26-5-2 |
1.4474 |
0.05 |
1.00 |
2.00 |
0.035 |
0.025 |
25.00/27.00 |
1.30/2.00 |
4.50/6.50 |
0.12/0.20 |
– |
– |
– |
| GX6CrNiN26-7 |
1.4347 |
0.08 |
1.50 |
1.50 |
0.035 |
0.020 |
25.00/27.00 |
– |
5.50/7.50 |
0.10/0.20 |
0.50 |
– |
– |
| GX2CrNiMoN22-5-3 |
1.4470 |
0.030 |
1.00 |
2.00 |
0.035 |
0.025 |
21.00/23.00 |
2.50/3.50 |
4.50/6.50 |
0.12/0.20 |
0.50 |
– |
– |
| GX2CrNiMoN25-6-3 |
1.4468 |
0.030 |
1.00 |
2.00 |
0.035 |
0.025 |
24.50/26.50 |
2.50/3.50 |
5.50/7.00 |
0.12/0.25 |
0.50 |
– |
– |
| GX2CrNiMoCuN25-6-3-3 |
1.4517 |
0.030 |
1.00 |
1.50 |
0.035 |
0.025 |
24.50/26.50 |
2.50/3.50 |
5.00/7.00 |
0.12/0.22 |
2.75/3.50 |
– |
– |
| GX2CrNiMoN25-7-3 |
1.4417 |
0.030 |
1.00 |
1.50 |
0.030 |
0.020 |
24.00/26.00 |
3.00/4.00 |
6.00/8.50 |
0.15/0.25 |
1.00 |
– |
1.00 |
| GX2CrNiMoN26-7-4 |
1.4469 |
0.030 |
1.00 |
1.00 |
0.035 |
0.025 |
25.00/27.00 |
3.00/5.00 |
6.00/8.00 |
0.12/0.22 |
1.30 |
– |
– |
Notes
1. The niobium content value applies for the sum of the niobium + tantalum.
2. For regulated markets sulphur contents between 0.015% and 0.030% are recommended.
3. For special applications a minimum content of 0.5% copper and 0.5% tungsten can be agreed.
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