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Chemical compositions of stainless steels to BS EN 10296-2

Introduction

BS EN 10296-2 is the material standard for stainless and heat-resisting steels for circular welded tubes for mechanical and general engineering (ie not pressure) purposes. This new standard was first published in December 2005 and replaces BS 6323-8:1982, which is now withdrawn.
Included in the standard are chemical compositions, delivery conditions and process route symbols, ambient temperature mechanical properties, some additional optional tests (leak testing, flattening, drift expansion, bend and non-destructive testing) and some dimensional and tolerance requirements.
Ferritic (7), austenitic (17), and austenitic-ferritic (duplex) (2) stainless steel grades and austenitic heat resisting grades (6) are included in the range of grades specified in this standard. Only the chemical composition of the stainless steels in the standard are listed in this article.

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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 10296-2 chemical composition tables

Corrosion resistant steels

Designation Chemical composition (% by mass – max unless stated)
Steel name Steel number C Si Mn P S Cr Mo Ni Cu N Nb Ti
Ferritic steels
X2CrNi12 1.4003 0.030 1.00 1.50 0.040 0.015 10.5/12.5 0.30/1.00 0.030
X2CrTi12 1.4512 0.030 1.00 1.00 0.040 0.015 10.5/12.5 0.030 6x(C+N)/0.65
X6Cr17 1.4016 0.08 1.00 1.00 0.040 0.015 16.0/18.0
X3CrTi17 1.4510 0.05 1.00 1.00 0.040 0.015 16.0/18.0 4x(C+N)+0.15/0.80
X2CrMoTi18-2 1.4521 0.025 1.00 1.00 0.040 0.015 17.0/20.0 1.80/2.50 0.030 4x(C+N)+0.15/0.80
X6CrMoNb17-1 1.4526 0.08 1.00 1.00 0.040 0.015 16.0/18.0 0.80/1.40 0.040 7x(C+N)+0.10/1.00
X2CrTiNb18 1.4509 0.030 1.00 1.00 0.040 0.015 17.5/18.5 3xC+0.30/1.00 0.10/0.69
Austenitic steels
X2CrNiN18-7 1.4318 0.030 1.00 2.00 0.045 0.015 16.5/18.5 6.0/8.0 0.10/0.20
X2CrNi18-9 1.4307 0.030 1.00 2.00 0.045 0.015 17.5/19.5 8.0/10.5 0.11
X2CrNi19-11 1.4306 0.030 1.00 2.00 0.045 0.015 18.0/20.0 10.0/12.0 0.11
X2CrNiN18-10 1.4311 0.030 1.00 2.00 0.045 0.015 17.0/19.5 8.5/11.5 0.12/0.22
X5CrNi18-10 1.4301 0.07 1.00 2.00 0.045 0.015 17.0/19.5 8.0/10.5 0.11
X6CrNiTi18-10 1.4541 0.08 1.00 2.00 0.045 0.015 17.0/19.0 9.0/12.0 5xC/0.70
X6CrNiNb18-10 1.4550 0.08 1.00 2.00 0.045 0.015 17.0/19.0 9.0/12.0 10xC/1.00
X2CrNiMo17-12-2 1.4404 0.030 1.00 2.00 0.045 0.015 16.5/18.5 2.00/2.50 10.0/13.0 0.11
X5CrNiMo17-12-2 1.4401 0.07 1.00 2.00 0.045 0.015 16.5/18.5 2.00/2.50 10.0/13.0 0.11
XCrNiMoTi17-12-2 1.4571 0.08 1.00 2.00 0.045 0.015 16.5/18.5 2.00/2.50 10.5/13.5 5xC/0.70
X2CrNiMo17-12-3 1.4432 0.030 1.00 2.00 0.045 0.015 16.5/18.5 2.50/3.00 10.5/13.0 0.11
X2CrNiMoN17-13-3 1.4429 0.030 1.00 2.00 0.045 0.015 16.5/18.5 2.50/3.00 11.0/14.0 0.12/0.22
X3CrNiMo17-13-3 1.4436 0.05 1.00 2.00 0.045 0.015 16.5/18.5 2.50/3.00 10.5/13.0 0.11
X2CrNiMo18-14-3 1.4435 0.030 1.00 2.00 0.045 0.015 17.0/19.0 2.50/3.00 12.5/15.0 0.11
X2CrNiMoN17-13-5 1.4439 0.030 1.00 2.00 0.045 0.015 16.5/18.5 4.0/5.0 12.5/14.5 0.12/0.22
X1CrNiMoCu25-20-5 1.4539 0.020 0.70 2.00 0.030 0.010 19.0/21.0 4.0/5.0 24.0/26.0 1.20/2.00 0.15
X1CrNiMoCuN20-18-7 1.4547 0.020 0.70 1.00 0.030 0.010 19.5/20.5 6.0/7.0 17.5/18.5 0.50/1.00 0.18/0.25
Austenitic ferritic steels
X2CrNiN23-4 1.4362 0.030 1.00 2.00 0.035 0.015 22.0/24.0 0.10/0.60 3.5/5.5 0.10/0.60 0.05/0.20
X2CrNiMoN22-5-3 1.4462 0.030 1.00 2.00 0.035 0.015 21.0/23.0 2.50/3.5 4.5/6.5 0.10/0.22
X2CrNiMoN25-7-4 1.4410 0.030 1.00 2.00 0.035 0.015 24.0/26.0 3.0/4.5 6.0/8.0 0.24/0.35

Heat resisting steels

Designation Chemical composition (% by mass – max unless stated)
Steel name Steel number C Si Mn P S Cr Ni N Ce
Austenitic heat resisting steels
X15CrNiSi20-12 1.4828 0.20 1.50/2.50 2.00 0.045 0.015 19.0/21.0 11.0/13.0 0.11
X9CrNiSiNCe21-11-2 1.4835 0.05/0.12 1.40/2.50 1.00 0.045 0.015 20.0/22.0 10.0/12.0 0.12/0.20 0.03/0.08
X12CrNi23-13 1.4833 0.15 1.00 2.00 0.045 0.015 22.0/24.0 12.0/14.0 0.11
X8CrNi25-21 1.4845 0.10 1.50 2.00 0.045 0.015 24.0/26.0 19.0/22.0 0.11
X6CrNiSiNCe19-10 1.4818 0.04/0.08 1.00/2.00 1.00 0.045 0.015 18.0/20.0 9.0/11.0 0.12/0.20 0.03/0.08
X6NiCrSiNCe35-25 1.4854 0.04/0.08 1.20/2.00 2.00 0.040 0.015 24.0/26.0 34.0/36.0 0.12/0.20 0.03/0.08

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