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    EN 10269 Proof Strength

    Minimum 0.2% Proof Strength (Rp0.2) at Elevated Temperatures for EN 10269 Grades

    Explore the minimum 0.2% proof strength values (Rp0.2) at elevated temperatures ranging from 50°C to 650°C for various steels and nickel alloys specified under the EN 10269 standard for pressure vessel bolting.

    Minimum 0,2 %-proof strength values at elevated temperature of steels in delivery conditions which support the Essential Safety Requirements of Directive 97/23/EC d

    Material designation Heat treatment conditiona Diameter e d mm Minimum 0,2 %-proof strength Rp0,
    2 in MPa at a temperature (in °C) of:
    Name Number 50 100 150 200 250 300 350 400 450 500 550 600 650
    Steels for quenching and tempering
    C35E 1.1181 +N d ≤ 60 289*) 270*) 251 229 213 192 182 173 - - - - -
    +QT d ≤ 60 289*) 270*) 251 229 213 192 182 173 - - - - -
    60 < d ≤ 150 287*) 264*) 242*) 220 203 186 167 147 - - - - -
    C45E 1.1191 +QT d ≤ 150 330*) 314 299*) 284 255 235 206 - - - - - -
    35B2 1.5511 +QT d ≤ 60 289*) 270*) 251 229 213 192 182 173 - - - - -
    60 < d ≤ 150 287*) 264*) 242*) 220 203 186 167 147 - - - - -
    20Mn5 1.1133 +N d ≤ 60 306*) 283*) 260 237 213 192 182 173 - - - - -
    60 < d ≤ 150 304*) 278*) 251 229 213 192 182 173 - - - - -
    25CrMo4 1.7218 +QT d ≤ 100 435*) 428*) 420*) 412 392 363 333 304 275 235 - - -
    100 < d ≤ 150 414*) 403*) 393*) 382 372 344 324 294 265 226 - - -
    42CrMo4 1.7225 +QT d ≤ 60 720*) 702 677 640 602 562 518 475 420 375 - - -
    42CrMo5-6 1.7233 + QT d ≤ 100 681*) 662 639 616 601 585 570 547 516 462 362 223 -
    100 < d ≤ 150 625*) 605 584 563 549 535 521 500 472 422 331 204 -
    40CrMoV4-6 1.7711 +QT d ≤ 100 687*) 670 647 631 608 593 577 554 523 470 400 293 -
    100 < d ≤ 160 631*) 612 591 577 556 542 528 507 479 429 366 268 -
    27NiCrMoV15-6 1.6957 +QT d ≤ 160 - 660 - 625 600 580 550 (510) c (460) c (400) c - - -
    26 NiCrMo14-6 1.6958 +QT 70 < d ≤ 160 - 853 843 834 804 785 765 - - - - - -
    21CrMoV5-7 1.7709 +QT d ≤ 160 542*) 530 515*) 500 480*) 460 435*) 410 380 350 - - -
    20CrMoVTiB4-10 1.7729 +QT d ≤ 160 642*) 624 603 595 581 573 559 537 508 464 406 334 -
    X15CrMo5-1 1.7390 +NT or +QT d ≤ 160 392*) 345 335 327 323 322 316 306 285 256 - - -
    X22CrMoV12-1 1.4923 +QT1 d ≤ 160 585*) 560 545*) 530 505*) 480 450*) 420 380 335 - - -
    X12CrNiMoV12-3 b 1.4938 +QT1 d ≤ 160 730*) 680 668*) 655 653*) 650 630*) 610 560 505 400 - -
    Austenitic steels
    X2CrNi18-9 1.4307 +AT d ≤ 160 164*) 145 130 118 108 100 94 89 85 81 80 - -
    X5CrNi18-10 1.4301 +AT d ≤ 160 177*) 155 140 127 118 110 104 98 95 92 90 - -
    X4CrNi18-12 1.4303 +AT d ≤ 160 177*) 155 140 127 118 110 104 98 95 92 90 - -
    X2CrNiN18-10 1.4311 +AT d ≤ 160 246 205 175 157 145 136 130 125 121 119 118 - -
    X6CrNi25-20 1.4951 +AT d ≤ 160 177 140 128 116 108 100 94 91 86 85 84 - -
    X2CrNiMo17-12-2 1.4404 +AT d ≤ 160 187*) 165 150 137 127 119 113 108 103 100 98 - -
    X5CrNiMo17-12-2 1.4401 +AT d ≤ 160 191*) 175 158 145 135 127 120 115 112 110 108 - -
    X2CrNiMoN17-13-3 1.4429 +AT d ≤ 160 256*) 215 195 175 165 155 150 145 140 138 136 - -
    X6CrNi18-10 1.4948 +AT d ≤ 160 174*) 157 142 127 117 108 103 98 93 88 83 78 -
    X10CrNiMoMnNbVB15-10-1 1.4982 +AT+WW d ≤ 100 490 463 446 434 423 413 405 396 391 386 378 365 346
    X3CrNiMoBN17-13-3 1.4910 +AT d ≤ 160 239*) 205 187 170 159 148 141 134 130 127 124 121 -
    X6CrNiMoB17-12-2 1.4919 +AT d ≤ 160 194*) 177 162 147 137 127 122 118 113 108 103 98 -
    X6CrNiTiB18-10 1.4941 +AT d ≤ 160 183*) 162 152 142 137 132 127 123 118 113 108 103 -
    X6NiCrTiMoVB25-15-2 1.4980 +AT+P d ≤ 160 592*) 580 570 560 550 540 530 520 510 490 460 430 380
    X7CrNiMoBNb16-16 1.4986 +WW+P d ≤ 100 489*) 470*) 451*) 432 412 393 372 353 334 314 284 255 206
    • a +AT = solution annealed; +C = cold work hardened; +N = normalized; +NT = normalized and tempered; +P = precipitation hardened; +QT = quenched and tempered; +WW = warm worked (see Annex B).
    • b This steel grade is generally not applied in the creep range.
    • c Values in brackets signify that the steel is not intended for use (and testing) at those temperatures.
    • d Products made to these steel grades and these final heat treatment conditions support the Essential Safety Requirements of Directive 97/23/EC; see Annex 1, 7.5 of this directive.
    • e For rectangular cross sections "d" will be replaced by "b" (see Figure 1).
    • *) Values calculated by linear interpolation.

    Minimum 0,2 %-proof strength values at elevated temperature of steels and nickel alloys in delivery conditions which do not support the Essential Safety Requirements of Directive 97/23/ECb

    Material designation Heat treatment conditiona Diameter c d mm Minimum 0,2 %-proof strength Rp0,
    2 in MPa at a temperature (in °C) of:
    Name Number 50 100 150 200 250 300 350 400 450 500 550 600 650
    Steels for quenching and tempering
    X22CrMoV12-1 1.4923 +QT2 d ≤160 681*) 650 625*) 600 575*) 550 518*) 485 440 390 - - -
    X19CrMoNbVN11-1 1.4913 +QT d ≤ 160 726*) 701 676 651 643 627 610 577 544 495 412 305 -
    Nickel alloys
    NiCr20TiAl 2.4952 +AT+P d ≤ 160 595*) 586*) 577*) 568 564 560 550 540 530 520 510 500 480
    NiCr19Fe19Nb5Mo3 2.4668 +P d ≤ 160 - - - - - 880 - 865 - 860 - 860 -
    NiCr15Fe7TiAl 2.4669 +AT+P d ≤ 25 625*) 620 615 610 606 601 596 592 587 582 578 573 565
    • a +AT = solution annealed; +C = cold work hardened; +N = normalized; +NT = normalized and tempered; +P = precipitation hardened; +QT = quenched and tempered; +WW = warm worked (see Annex B).
    • b Products made to these steel grades and these final heat treatment conditions do not support the Essential Safety Requirements of Directive 97/23/EC, unless other criteria are taken into account; see Annex 1, 7.5 of this directive.
    • c For rectangular cross sections "d" will be replaced by "b".
    • *) Values calculated by linear interpolation.
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