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6a. Chemical composition of stainless steel flat products for pressure purposes to BS EN 10028-7

Introduction

 

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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 10028-7:2007 Edition

BS EN 10028-7 was originally published in 2000. The second, current version, BS EN 10028-7:2007, has superseded BS EN 10028-7:2000, which was withdrawn by BSi on 31st January 2008.
The tables shown here only have the 2005 composition ranges.

The grades are taken mostly from BS EN 10088-2 with some grades from creep resisting standard BS EN 10302. The distinction between standard and special grades in BS EN 10088-2 is not followed through into this standard. The following tables preserve the listing in the standard which is not in grade number order.

BS EN 10028-7 chemical composition tables

Designation Chemical composition % by mass max unless stated
Steel name Steel number C Si Mn P S N Cr Mo Ni Others
Ferritic stainless steels
X2CrNi12 1.4003 0.030 1.00 1.50 0.040 0.015 0.030 10.5/12.5 0.30/1.00
X6CrNiTi12 1.4516 0.08 0.70 1.50 0.040 0.015 10.5/12.5 0.50/1.50 Ti: 0.05/0.35
X2CrTi17 1.4520 0.025 0.50 0.50 0.040 0.015 0.015 16.0/18.0 Ti: 0.30/0.60
X3CrTi17 1.4510 0.05 1.00 1.00 0.040 0.015 16.0/18.0 Ti: 4(C+N)+0.15/0.80
X2CrMoTi17-1 1.4513 0.025 1.00 1.00 0.040 0.015 0.015 16.0/18.0 0.80/1.40 Ti: 0.30/0.60
X2CrMoTi18-2 1.4521 0.025 1.00 1.00 0.040 0.015 0.030 17.0/20.0 1.80/2.50 Ti: 4(C+N)+0.15/0.80
X6CrMoNb17-1 1.4526 0.08 1.00 1.00 0.040 0.015 0.040 16.0/18.0 0.80/1.40 Nb:7(C+N)+0.10/1.00
X2CrTiNb18 1.4509 0.030 1.00 1.00 0.040 0.015 17.5/18.5 Ti: 0.10/0.60
Nb: 3C+0.30/1.00
Martensitic stainless steels
X3CrNiMo13-4 1.4313 0.05 0.70 1.50 0.040 0.015 >0.020 12.0/14.0 0.30/0.70 3.5/4.5
X4CrNiMo16-5-1 1.4418 0.06 0.70 1.50 0.040 0.015 >0.020 15.0/17.0 0.80/1.50 4.0/6.0
Austenitic stainless steels
X2CrNiN18-7 1.4318 0.030 1.00 2.00 0.045 0.015 0.10/0.20 16.5/18.5 6.0/8.0
X2CrNi18-9 1.4307 0.030 1.00 2.00 0.045 0.015 0.11 17.5/19.5 8.0/10.5
X2CrNi19-11 1.4306 0.030 1.00 2.00 0.045 0.015 0.11 18.0/20.0 10.0/12.0
X5CrNiN19-9 1.4315 0.06 1.00 2.00 0.045 0.015 0.12/0.22 18.0/20.0 8.0/11.0
X2CrNiN18-10 1.4311 0.030 1.00 2.00 0.045 0.015 0.12/0.22 17.5/19.5 8.5/11.5
X5CrNi18-10 1.4301 0.07 1.00 2.00 0.045 0.015 0.11 17.5/19.5 8.0/10.5
X6CrNiTi18-10 1.4541 0.08 1.00 2.00 0.045 0.015 17.0/19.0 9.0/12.0 Ti: 5C/0.70
X6CrNiNb18-10 1.4550 0.08 1.00 2.00 0.045 0.015 17.0/19.0 9.0/12.0 Nb: 10xC/1.00
X1CrNi25-21 1.4335 0.020 0.25 2.00 0.025 0.010 0.11 24.0/26.0 0.20 20.0/22.0
X2CrNiMo17-12-2 1.4404 0.030 1.00 2.00 0.045 0.015 0.11 16.5/18.5 2.00/2.50 10.0/13.0
X2CrNiMoN17-11-2 1.4406 0.030 1.00 2.00 0.045 0.015 0.12/0.22 16.5/18.5 2.00/2.50 10.0/12.0
X5CrNiMo17-12-2 1.4401 0.07 1.00 2.00 0.045 0.015 0.11 16.5/18.5 2.00/2.50 10.0/13.0
X1CrNiMoN25-22-2 1.4466 0.020 0.70 2.00 0.025 0.010 0.10/0.16 24.0/26.0 2.00/2.50 21.0/23.0
X6CrNiMoTi17-12-2 1.4571 0.08 1.00 2.00 0.045 0.015 16.5/18.5 2.00/2.50 10.5/13.5 Ti: 5C/0.70
X6CrNiMoNb17-12-2 1.4580 0.08 1.00 2.00 0.045 0.015 16.5/18.5 2.00/2.50 10.5/13.5 Nb: 10xC/1.00
X2CrNiMo17-12-3 1.4432 0.030 1.00 2.00 0.045 0.015 0.11 16.5/18.5 2.50/3.00 10.5/13.0
X2CrNiMoN17-3-3 1.4429 0.030 1.00 2.00 0.045 0.015 0.12/0.22 16.5/18.5 2.50/3.00 11.0/14.0
X3CrNiMo17-13-3 1.4436 0.05 1.00 2.00 0.045 0.015 0.11 16.5/18.5 2.50/3.00 10.5/13.0
X2CrNiMo18-14-3 1.4435 0.030 1.00 2.00 0.045 0.015 0.11 17.0/19.0 2.50/3.00 12.5/15.0
X2CrNiMoN18-12-4 1.4434 0.030 1.00 2.00 0.045 0.015 0.10/0.20 16.5/19.5 3.0/4.0 10.5/14.0
X2CrNiMo18-15-4 1.4438 0.030 1.00 2.00 0.045 0.015 0.11 17.5/19.5 3.0/4.0 13.0/16.0
X2CrNiMoN17-13-5 1.4439 0.030 1.00 2.00 0.045 0.015 0.12/0.22 16.5/18.5 4.0/5.0 12.5/14.5
X1NiCrMo31-27-4 1.4563 0.020 0.70 2.00 0.030 0.010 0.11 26.0/28.0 3.0/4.0 30.0/32.0 Cu: 0.70/1.50
X1NiCrMoCu25-20-5 1.4539 0.020 0.70 2.00 0.030 0.010 0.15 19.0/21.0 4.0/5.0 24.0/26.0 Cu: 1.20/2.00
X1CrNiMoCuN25-25-5 1.4537 0.020 0.70 2.00 0.030 0.010 0.17/0.25 24.0/26.0 4.7/5.7 24.0/27.0 Cu: 1.00/2.00
X1CrNiMoCuN20-18-7 1.4547 0.020 0.70 1.00 0.030 0.010 0.18/0.25 19.5/20.5 6.0/7.0 17.5/18.5 Cu: 0.50/1.00
X1NiCrMoCuN25-20-7 1.4529 0.020 0.50 1.00 0.030 0.010 0.15/0.25 19.0/21.0 6.0/7.0 24.0/26.0 Cu: 0.50/1.50
Austenitic creep resisting steels
X3CrNiMoBN17-13-3  1.4910  0.4 0.75 2.00 0.035 0.015 0.10/0.18 16.0/18.0 2.00/3.00 12.0/14.0 B:0.0015/0.0050
X6CrNiTiB18-10 1.4941 0.04/0.08 1.00 2.00 0.035 0.015 17.0/19.0 9.0/12.0 Ti: 5xC/ 0.80

B:0.0015/0.0050

X6CrNi18-10 1.4948 0.04/0.08 1.00 2.00 0.035 0.015 0.10 17.0/19.0 8.0/11.0
X6CrNi23-13 1.4950 0.04/0.08 0.70 2.00 0.035 0.015 0.10 22.0/24.0 12.0/15.0
X6CrNi25.20 1.4951 0.04/0.08 0.70 2.00 0.035 0.015 0.10 24.0/26.0 19.0/22.0
X5NiCrAlTi31-20 1.4958 (+RA) 0.03/0.08 0.70 1.50 0.015 0.010 0.030 19.0/22.0 30.0/32.5 Cu: 0.50

Nb:0.10

Ti:0.20/0.50

Al:0.20/0.50

Al+Ti:0.70

Co: 0.50

Ni+Co: 30.0/32.5

X8NiCrAlTi32-21 1.4959 0.05/0.10 0.70 1.50 0.015 0.010 0.030 19.0/22.0 30.0/34.0 Cu: 0.50

Ti: 0.20/0.65

Al:0.20/0.65

Co: 0.50

Ni+Co: 30.0/34.0

X8CrNiNb16-13 1.4961 0.04/0.10 0.30/

0.60

1.50 0.035 0.015 15.0/17.0 12.0/14.0 Nb: 10xC/1.20
Austenitic-ferritic stainless steels
X2CrNiN23-4 1.4362 0.030 1.00 2.00 0.035 0.015 0.05/0.20 22.0/24.0 0.10/0.60 3.5/5.5 Cu 0.10/0.60
X2CrNiMoN12-5-3 1.4462 0.030 1.00 2.00 0.035 0.015 0.10/0.22 21.0/23.0 2.50/3.50 4.5/6.5
X2CrNiMoCuN25-6-3 1.4507 0.030 0.70 2.00 0.035 0.015 0.20/0.30 24.0/26.0 3.0/4.0 6.0/8.0 Cu: 1.00/2.50
X2CrNiMoN25-7-4 1.4410 0.030 1.00 2.00 0.035 0.015 0.24/0.35 24.0/26.0 3.0/4.5 6.0/8.0
X2CrNiMoCuWN25-7-4 1.4501 0.030 1.00 1.00 0.035 0.015 0.20/0.30 24.0/26.0 3.0/4.0 6.0/8.0 Cu: 0.50/1.00
W: 0.50/1.00

Permissible product analysis tolerances on the cast analysis ranges given in EN 10028-7

 

Element Specified Limits on Cast Analysis (%) Permissible tolerance on product analysis (%)
Carbon < 0.030 +0.005
> 0.030 < 0.10 ±0.01
Silicon < 1.00 ±0.05
Manganese < 1.00 +0.03
> 1.00 < 2.00 ±0.04
Phosphorus < 0.045 +0.005
Sulphur < 0.015 +0.003
Nitrogen < 0.35 ±0.01
Aluminium < 0.65 ±0.10
Boron > 0.0015 < 0.0050 ±0.0003
Chromium > 10.5 < 15.0 ±0.15
> 15.0 < 20.0 ±0.20
> 20.0 < 28.0 ±0.25
Copper < 1.00 ±0.07
> 1.00 < 2.50 ±0.10
Molybdenum <0.60 ±0.03
> 0.60 < 1.75 ±0.05
> 1.75 < 7.0 ±0.10
Niobium < 1.20 ±0.05
Nickel < 1.00 ±0.03
> 1.00 < 5.0 ±0.07
> 5.0 < 10.0 ±0.10
> 10.0 < 20.0 ±0.15
> 20.0 < 34.0 ±0.20
Cobalt < 0.50 ±0.05
Titanium < 0.80 ±0.05
Tungsten < 2.50 ±0.05
Vanadium < 0.20 ±0.03

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