Elevated and sub-zero temperature mechanical properties of stainless steels to BS EN 10269

Introduction

BS EN 10269 is the material standard for stainless and heat-resisting steels, a selection of low alloy steels and some nickel alloys for fasteners. The elevated and sub-zero temperature mechanical properties shown in this article include 0.2% proof and tensile strengths and impact (charpy) strength in the finally heat treated condition. The final heat treatment conditions for each grade are also tabulated.

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

Elevated temperature mechanical properties

Both 0.2% proof and tensile strengths are shown in the standard. These are shown below in separate tables.

Proof strengths

Designation Condition Max dia. mm Minimum proof strength Rp0.2 N/mm2 at a temperature of (C)
Steel name Steel number 50 100 150 200 250 300 350 400 450 500 550 600 650
Steels for quenching and tempering
X22CrMoV12-1 1.4923 QT1 160 585 560 545 530 505 480 450 420 380 335 280 - -
QT2 160 681 650 625 600 575 550 518 485 440 390 330 - -
X12CrNiMoV12-3 1.4938 QT 160 730 680 668 655 653 650 630 610 560 505 400 - -
X19CrMoNbVN11-1 1.4913 QT 160 726 701 676 651 643 627 610 577 544 495 412 305 -
Austenitic Steels
X2CrNi18-9 1.4307 AT 160 164 145 130 118 108 100 94 89 85 81 80 - -
X5CrNi18-10 1.4301 AT 160 177 155 140 127 118 110 104 98 95 92 90 - -
X4CrNi18-12 1.4303 AT 160 177 155 140 127 118 110 104 98 95 92 90 - -
X2CrNiMo17-12-2 1.4404 AT 160 187 165 150 137 127 119 113 108 103 100 98 - -
X5CrNiMo17-12-2 1.4401 AT 160 191 175 158 145 135 127 120 115 112 110 108 - -
X2CrNiMoN17-13-3 1.4429 AT 160 256 215 195 175 165 155 150 145 140 138 136 - -
X6CrNi18-10 1.4948 AT 160 174 157 142 127 117 108 103 98 93 88 83 78 -
X10CrNiMoMnNbVB15-10-1 1.4982 AT + WW 100 490 463 446 434 423 413 405 396 391 386 378 365 346
X3CrNiMoBN17-13-3 1.4910 AT 160 239 205 187 170 159 148 141 134 130 127 124 121 -
X6CrNiMoB17-12-2 1.4919 AT 160 194 177 162 147 137 127 122 118 112 108 103 98 -
X6CrNiTiB18-10 1.4941 AT 160 183 162 152 142 137 132 127 123 118 113 108 103 -
X6NiCrTiMoVB25-15-2 1.4980 AT + P 160 592 580 570 560 550 540 530 520 510 490 460 430 380
X7CrNiMoBNb16-16 1.4986 WW +P 100 489 470 451 432 412 393 372 353 334 314 284 255 206

Tensile strengths

Designation Condition Max dia. mm Minimum tensile strength Rm N/mm2 at a temperature of ( C)
Steel name Steel number 50 100 150 200 250 300 350 400 450 500 550 600 650
Austenitic steels
X2CrNi18-9 1.4307 AT 160 440 410 380 360 350 340 340 330 - - - - -
X5CrNi18-10 1.4301 AT 160 480 450 420 400 390 380 380 380 375 360 335 300 -
X4CrNi18-12 1.4303 AT 160 480 450 420 400 390 380 380 380 375 360 335 300 -
X2CrNiMo17-12-2 1.4404 AT 160 460 430 410 390 385 380 380 380 375 360 335 - -
X5CrNiMo17-12-2 1.4401 AT 160 480 460 440 420 415 410 410 410 405 390 375 350 -
X2CrNiMoN17-13-3 1.4429 AT 160 550 520 490 460 450 440 435 435 435 430 410 380 -
X6CrNi18-10 1.4948 AT 160 480 450 420 400 390 380 380 380 375 360 335 300 -
X10CrNiMoMnNbVB15-10-1 1.4982 AT + WW 160 610 565 530 505 490 475 465 460 450 440 430 410 390
X3CrNiMoBN17-13-3 1.4910 AT 160 550 520 490 460 450 440 435 435 435 430 410 380 -
X6CrNiMoB17-12-2 1.4919 AT 160 490 460 440 420 415 410 410 410 405 390 375 350 -
X6CrNiTiB18-10 1.4941 AT 160 490 460 440 420 415 410 410 410 405 390 375 350 -
X6NiCrTiMoVB25-15-2 1.4980 AT +P 160 n.a. n.a. n.a. n.a. n.a. n.a. n.a. 720 710 700 690 670 -
X7CrNiMoBNb16-16 1.4986 WW +P 100 635 615 590 570 550 530 505 485 460 440 420 395 375

Sub-zero temperature mechanical properties

Designation Condition Max dia. mm Minimum impact energy J (ISO-V test pieces) at a temperature of ( C)
Steel name Steel number -270 -196 +20
Austenitic steels
X2CrNi18-9 1.4307 C700 35 - 50 80
X5CrNi18-10 1.4301 AT 160 - 60 100
C700 35 - 50 80
X4CrNi18-12 1.4303 AT 160 - 60 100
C700 35 - 50 80
X2CrNiMo17-12-2 1.4404 C700 35 - 50 80
X5CrNiMo17-12-2 1.4401 C700 35 - 50 80
X2CrNiMoN17-13-3 1.4429 AT 160 50 60 100
X6CrNi18-10 1.4948 AT 160 - 60 100
X3CrNiMoBN17-13-3 1.4910 AT 160 50 60 100
X6CrNiMoB17-12-2 1.4919 AT 160 - 60 100
X6CrNiTiB18-10 1.4941 AT 160 - 60 100
X6NiCrTiMoVB25-15-2 1.4980 AT+ P 160 - 40 50

Note
Cold worked condition C700 for austenitic grades represents a minimum tensile strength of 700 N/mm2

Heat treatment and worked conditions

Steel number H T Symbol Quench/anneal (1) Cooling (2) Temper (3)
1.4923 QT1 1020/1070 a,o,w 680/740
QT2 1020/1070 a,o,w 660/720
1.4938 QT 1035/1062 o 600/670
1.4913 QT 1100/1130 a,o 670/720
1.4307, 1.4301, 1.4303, 1.4567 AT 1000/1100 w,a -
1.4404, 1.4401, 1.4429, AT 1020/1120 w,a -
1.4948 AT 1000/1080 w,a -
1.4982 AT + WW 1030/1070+650/750 w+a -
1.4910, 1.4919 AT 1020/1100 w,a -
1.4941 AT 1070/1150 w,a -
1.4980 AT + P 970/990 o,w 710/730
1.4986 WW + P WW at 750/850 - 750/800

Notes
(1) Quenching or solution annealing temperature C
(2) Type of cooling a - air ; o - oil ; w - water
(3) Tempering or precipitation treatment temperature C
AT - solution annealed QT - quenched and tempered P - precipitation hardened WW - warm worked

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