Chemical Composition of Creep Resisting Steels to BS EN 10302

Chemical composition of creep resisting steels to BS EN-10302
BS EN 10302 is the material standard for creep resisting steels, nickel and cobalt alloys. Martensitic
and austenitic steels are included. The latest edition was published in April 2008. There are some minor
changes and the addition of one new grade 1.4951 which is a 310 with a minimum carbon content.
The chemical composition of steel grades covered in the this standard include, 1.4903, 1.4905, 1.4911,
1.4913, 1.4922, 1.4923, 1.4935, 1.4938, 1.4910, 1.4919, 1.4941, 1.4945, 1.4951, 1.4958, 1.4959, 1.4961,
1.4962, 1.4971, 1.4980, 1.4981, 1.4983, and 1.4988

CHEMICAL COMPOSITION OF CREEP RESISTING STEELS TO BS EN 10302
Introduction
BS EN 10302 is the material standard for creep resisting steels, nickel and cobalt alloys in bar, rod and flat product forms.
Martensitic and austenitic steels are included. Most of these grades can also be classed as stainless steels by the definition
given in BS EN 10088-1, which considers steels with minimum chromium, (Cr), contents of 11.5% and maximum carbon, (C),
contents of 1.2% to be stainless steels. In BS EN 10088 however the primary purpose of the alloys is corrosion resistance,
whereas in BS EN 10302 the elevated temperature strength and oxidation resistance are the main properties required of the
steels listed here, in their intended applications.

The latest 2008 edition has some minor changes:

Most Chromium and Nickel ranges are now quoted to only 1 decimal place compared to 2 in the previous edition
The P and S contents for grade 1.4922 have been lowered
There is one new grade 1.4951 a 310 type with a minimum Ni content
These changes are shown in bold in the table below.

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Type in the term you are looking for in the dialog box that then appears.

The data given is not intended to replace that shown in individual standards to which reference should always be made.

BS EN 10302 chemical composition tables

Designation Chemical composition (% by mass – max unless stated)
Steel name Number C Si Mn P S N Al Cr Mo Nb Ni Ti V W Others
Martensitic Steels
X10CrMoVNb9-1 1.4903 0.08/0.12 0.50 0.30/0.60 0.025 0.015 0.030/0.070 0.030 8.0/9.5 0.85/1.05 0.060/ 0.10 0.40 – 0.18/ 0.25 – –
X11CrMoWVNb9-1-1 1.4905 0.09/0.13 0.10/0.50 0.30/0.60 0.020 0.010 0.050/0.090 0.040 8.5/9.5 0.90/1.10 0.06/ 0.10 0.10/0.40 – 0.18/ 0.25 0.90/ 1.10 B:0.0005/0.0050
X8CrCoNiMo10-6 1.4911 0.05/0.12 0.10/0.80 0.30/1.30 0.025 0.015 0.035 – 9.8/11.2 0.50/1.00 0.20/ 0.50 0.20/1.20 – 0.10/ 0.40 0.70 B:0.005/ 0.015 Co:5.00/7.00
X19CrMoNbVN11-1 1.4913 0.17/0.23 0.50 0.40/0.90 0.025 0.015 0.050/0.10 0.020 10.0/11.5 0.50/0.80 0.25/ 0.55 0.20/0.60 – 0.10/ 0.30 – B:0.0015
X20CrMoV11-1 1.4922 0.17/0.23 0.50 1.00 0.025 0.015 – – 10.0/12.5 0.80/1.20 – 0.30/0.80 – 0.25/ 0.35 – –
X22CrMoV12-1 1.4923 0.18/0.24 0.50 0.40/0.90 0.025 0.015 – – 11.0/12.5 0.80/1.20 – 0.30/0.80 – 0.25/ 0.35 – –
X20CrMoWV12-1 1.4935 0.17/0.24 0.10/0.50 0.30/0.80 0.025 0.015 – – 11.0/12.5 0.80/1.20 – 0.30/0.80 – 0.20/ 0.35 0.40/ 0.60 –
X12CrNiMoV12-3 1.4938 0.08/0.15 0.50 0.40/0.90 0.025 0.015 0.020/0.040 – 11.0/12.5 1.50/2.00 – 2.00/3.00 – 0.25/ 0.40 – –
Austenitic Steels
X3CrNiMoBN17-13-3 1.4910 0.04 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
X6CrNiMoB17-12-2 1.4919 0.04/0.08 1.00 2.00 0.035 0.015 0.11 – 16.5/18.5 2.00/2.50 – 10.0/13.0 – – – 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 5xC/ 0.80 – – B:0.0015/0.0050
X6CrNiWNbN16-16 1.4945 0.04/0.10 0.30/0.60 1.50 0.035 0.015 0.06/ 0.14 – 15.5/17.5 – 10xC/ 1.20 15.5/17.5 – 2.50/ 3.50 –
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 0.030/0.08 0.70 1.50 0.015 0.010 – 0.20/ 0.50 19.0/22.0 – 0.10 30.0/32.5 0.20/ 0.50 – – Cu:0.50
X8NiCrAlTi32-21 1.4959 0.05/0.10 0.70 1.50 0.015 0.010 – 0.20/ 0.65 19.0/22.0 – – 30.0/34.0 0.25/ 0.65 – – Cu:0.50
X8CrNiNb16-13 1.4961 0.04/0.10 0.30/0.60 1.50 0.035 0.015 – – 15.0/17.0 – 10xC/ 1.20 12.0/14.0 – – – –
X12CrNiWTiB16-13 1.4962 0.07/0.15 0.50 1.50 0.035 0.015 – – 15.5/17.5 – – 12.5/14.5 0.40/ 0.70 – 2.50/ 3.00 B:0.0015/0.0060
X12CrCoNi21-20 1.4971 0.08/0.16 1.00 2.00 0.035 0.015 0.10/ 0.20 – 20.0/22.5 2.50/3.5 0.75/ 1.25 19.0/21.0 – – 2.00/ 3.00 Co:18.50/21.00
X6NiCrTiMoVB25-15-2 1.4980 0.030/0.08 1.00 1.00/2.00 0.025 0.015 – 0.35 13.5/16.0 1.00/1.50 – 24.0/27.0 1.90/ 2.30 0.10/ 0.50 – B:0.0030/0.010
X8CrNiMoNb16-16 1.4981 0.04/0.10 0.30/0.60 1.50 0.035 0.015 – – 15.5/17.5 1.60/2.00 10xC/ 1.20 15.5/17.5 – – – –
X6CrNiMoTiB17-13 1.4983 0.04/0.08 0.75 2.00 0.035 0.015 – – 16.0/18.0 2.00/2.50 – 12.0/14.0 5xC/ 0.80 – – B:0.0015/0.0060
X8CrNiMoVNb16-13 1.4988 0.04/ 0.10 0.30/ 0.60 1.50 0.035 0.015 0.06/ 0.14 – 15.5/17.5 1.10/1.50 10xC/ 1.20 12.5/14.5 0.60/ 0.85 – –

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