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4e. Ambient temperature mechanical properties of creep resisting steels to BS EN 10302

Introduction

EN 10302 is the European standard covering a wide range of creep resisting steels. Some of these can also be classified as stainless steels. This article summarises the mechanical properties of these steels.

BS EN 10302:2008

The latest edition of the standard was published in 2008.

Steel Grade Heat treatment Rp0.2

MPa

Rm

MPa

A% minimum
Steel Name Steel Number Long Products Flat Products
0.5 < a < 3

l, tr

< a

tr

Martensitic steels
X10CrMoVNb9-1 1.4903 +QT 450 620/850 20
X11CrMoWVNb9-1-1 1.4905 +QT 450 620/850 19
X8CrCoNiMo10-6 1.4911 +QT 850 1000/1140 10
X19CrMoNbVN11-1 1.4913 +QT (d<160) 750 900/1050 12
X20CrMoV11-1 1.4922 +QT 500 700/850 16 15
X22CrMoV12-1 1.4923 +QT (d<160) 600 800/950 14 14
X20CrMoWV12-1 1.4935 +QT 700 500 700/850 16 15
+QT 800 600 800/950 14
X12CrNiMoV12-3 1.4938 +QT (d<160) 760 930/1130 14 14
Austenitic steels
X3CrNiMoBN17-13-3 1.4910 +AT (d<160) 260 550/750 35 35
X6CrNiMoB17-12-2 1.4919 +AT (d<160) 205 490/690 35 30 35
X6CrNiTiB18-10 1.4941 +AT (d<160) 195 490/680 35 30 35
X6CrNiWNbN16-16 1.4945 +AT 250 540/740 30 30
+WW (warm worked) (d < 60) 490 630/840 17
X6CrNi25-20 1.4951 +AT 200 510/710 35 35 35
X5NiCrAlTi31-20 1.4958 +AT (d<160) 170 500/750 35 30 30
+RA 210 500/750 35 30 30
X8NiCrAlTi32-21 1.4959 +AT (d<160) 170 500/750 35 30 30
X8CrNiNb16-13 1.4961 +AT 200 510/690 35 30 35
X12CrNiWTiB16-13 1.4962  +AT 230 500/750 30 30
+WW (warm worked) (d < 60) 440 590/790 20
X12CrCoNi21-20 1.4971 +AT 300 690/900 30 35
X6NiCrTiMoVB25-15-2 1.4980 +P (d<160) 600 900/1150 15 15
X8CrNiMoNb16-16 1.4981 +AT 215 530/690 35 35
X6CrNiMoTiB17-13 1.4983 +AT 205 530/730 35 30 35
X8CrNiMoVNb16-13 1.4988 +P 255 540/740 30 30

The abbreviations in this table are:

+QT = Quench and Tempered

+AT = Solution Annealed

+P = Precipitation Hardened

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