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DIN 267 Specification

Fasteners, Boltings, Stud Bolts, Screws, Nuts, Washers

DIN 267 Scope

DIN 267 standard specifies material designations and mechanical properties of bolts and nuts with metric screw thread for use at service temperatures ranging from −200 °C to +700 °C, where requirements are to be met with regard to low temperature toughness and high temperature strength. DIN 267 standard supplements the specifications of DIN EN ISO 898-1, DIN EN 20898-2 and DIN EN ISO 898-6 by allowing the use of such fasteners at service temperatures below −50 °C and above +150 °C. DIN 267 Fasteners are duly certified with AD 2000-Merkblatt W2 for Austenitic and austenitic-ferritic steels; AD 2000-Merkblatt W7 , Bolts and nuts made from ferritic steel and AD 2000-Merkblatt W10 for low temperatures Ferrous materials.

Related Specifications of DIN 267 Bolting

EN 10269 BS EN 1515 EN 10088-3 ISO 898-1 ISO 898-2 ISO 3506-1 ISO 3506-2 ISO 3506-5

DIN 267 Chemical Composition

Austenitic steels as in DIN EN ISO 3506-1 and DIN EN ISO 3506-2 for low service temperatures

Minimum
temperature for
continuous service
(guideline value)		 Steel gradea Property class
Bolt Nut
−60 °C b A2L 50
70		 50
70
80
A2
A3
−200 °Cc A4L
A4
A5
  • NOTE No impairments of fastener reliability when used at higher service temperatures are known. When used at lower temperatures, the fasteners should be subjected to a suitability test for the intended application.
  • a Copper content ≤ 1 % (reduced content compared to that specified in DIN EN ISO 3506-1 and -2).
  • b Applies to bolts with head.
  • c Applies to headless bolts.

Steels and nickel alloys as in DIN EN 10269 for high and low service temperatures

Temperature ranges
from DIN EN 10269		 Material Hardness HV of bolt and/or nut
min. Shortterm servicea max. Longterm serviceb max. symbol number name conditionc min. max.
−120 °C – – KB 1.568 X12Ni5 + NT 157 203
+ QT 173 235
– 400 °C 500 °C Yd 1.1181 C35E + N 150 200
– 400 °C 500 °C YK 1.1181 C35E + QT 165 210
– 400 °C – YB 1.5511 35B2 g + QT 165 210
−60 °C 500 °C 550 °C KG 1.7218 25CrMo4 + QT 195 240
−100 °C 500 °C – GC 1.7225 42CrMo4 + QT 275 337
– 500 °C 550 °C GA 1.7709 21CrMoV5-7 + QT 225 272
– 600 °C 550 °C GB 1.7711 40CrMoV4 6 + QT 272 320
– 550 °C 600 °C Ve 1.4923 X22CrMoV12-1 + QT 1 e 256 303
– 550 °C 600 °C VHf 1.4923 X22CrMoV12-1 + QT2 f 287 367
– 600 °C 600 °C VW 1.4913 X19CrMoNbVN11-1 + QT 287 367
– 650 °C 670 °C S 1.4986 X7CrNiMoBNb16-16 + WW + P 210 272
−196 °C 650 °C 650 °C SD 1.498 X6NiCrTiMoVB25-15-2 + AT + P 287 367
−196 °C 650 °C 800 °C SB 2.4952 NiCr20TiAl + AT + P 320 417
  • a Maximum temperatures with specified proof strengths and tensile strengths.
  • b Maximum temperatures with specified creep strengths and creep rupture strengths.
  • c Heat treatment condition as defined in DIN EN 10269:2006-07, :
    • + N: normalized
    • + NT: normalized and tempered
    • + QT: quenched and tempered
    • + WW: warm worked
    • + AT: solution annealed
    • + P: precipitation hardened
    • d Applies only to nuts.
  • e Symbol V denotes grade X22CrMoV12-1 as in DIN EN 10269 with a 0,2 % proof strength Rp 0,2 ≥ 600 N/mm2 (+QT 1).
  • f Symbol VH denotes grade X22CrMoV12-1 as in DIN EN 10269 with a 0,2 % proof strength Rp 0,2 ≥ 700 N/mm2 (+ QT 2).
  • g See also VdTÜV-Werkstoffblatt WB 490.

Mechanical Requirments

Suitable combinations of bolt and nut

  Austenitic steels property class Steels and nickel alloys Test stressa Sp N/mm2
50 70 KB YK YB KG GA GB GC V VH VW S SD SB Coarse pitch thread min. type 1 Fine pitch thread min. type 2
Nut Austenitic steels property class 50 ○ – – – – – – – – – – – – – – 629b 725b
70 ○ ○ – – – – – – – – – – – – – 800b 875b
80 ● ● – – – – – – – – – – – – – 886b 950b
Steels and nickel alloys KB – – ● – – – – – – – – – – – – 654 748
Y – – – ○ ○ ○ – – – – – – – – – 714 800
YK – – – ● ● ● – – – – – – – – – 714 800
YB – – – ○ ○ ○ – – – – – – – – – 714 800
KG – – – – – ○ ● – – – – – – – – 800 875
GA – – – – – ● ● ● ● – – – – – – 937 995
GB – – – – – – ○ ○ ○ – – – – – – 937 995
GC – – – – – – ○ ○ ○ – – – – – – 937 995
V – – – – – – – – – ○ ○ ○ – – – 971 1025
VH – – – – – – – – – ○ ○ ○ – – – 971 1025
VW – – – – – – – – – ○ ○ ○ – – – 971 1025
S – – – – – – – – – – – – ○ – – 775 838
SD – – – – – – – – – – – – – ○ – 971 1025
SB – – – – – – – – – – – – – – ○ 1057 1100
Bolt Tensile strength Rm N/mm2 max. – – 710 650 650 750 850 1000 1060 950 1050 1050 850 1150 1300  
min. 500 700 530 500 500 600 700 850 860 800 900 900 650 900 1000
  • ● Preferred combination
  • ○ Permitted combination
  • - Not recommended
  • a The test stress specified takes into account the fact that the hardness of the test mandrel used in the proof load test is greater than the hardness of the bolts with which the nuts are combined. As a result, the test stress is always higher than the highest minimum tensile strength of the bolt recommended for use in the combination
  • b The test stresses given here are higher than those specified in DIN EN ISO 3506-2 in order to identify fully loadable nuts in the proof load test. While nuts of property classes 70 and 80 to DIN EN ISO 3506-2 with small diameters produced in large batches are usually cold-formed and property class 50 is only supplied hot-formed for larger diameters, special nuts to DIN 267-13 are required to be machined from steel bars when produced in small batches. As these bars obtain their strength through strainhardening (drawing), with the result that their mechanical properties are not uniform over their cross section, there is a risk that the nuts manufactured from such bars will achieve the low test stress in the proof load test to DIN EN ISO 3506-2 using a hardened mandrel, but that they will fail before the minimum failure load is reached when they are combined with a softer bolt. For this reason, it has been deemed necessary to specify higher test stresses.

Minimum failure loads for bolts with coarse pitch thread (As, Nenn × Rm, min in kN)

Thread
d		 Stress Area As, Nenn Austenitic
steels of
property class		 Steels and nickel alloys
50 70 KB YK,
YB		 KG GA GB GC V VH,
VW		 S SD SB
M3 area 2,52 3,52 2,67 2,52 3,02 3,52 4,28 4,33 4,02 4,53 3,27 4,53 5,03
M3,5 6,78 3,39 4,75 3,59 3,39 4,07 4,75 5,76 5,83 5,42 6,10 4,41 6,10 6,78
M4 8,78 4,39 6,15 4,65 4,39 5,27 6,15 7,46 7,55 7,02 7,90 5,71 7,90 8,78
M5 14,2 7,10 9,94 7,53 7,1 8,52 9,94 12,1 12,2 11,4 12,8 9,23 12,8 14,2
M6 20,1 10,1 14,1 10,7 10,1 12,1 14,1 17,1 17,3 16,1 18,1 13,1 18,1 20,1
M7 28,9 14,5 20,2 15,3 14,5 17,3 20,2 24,6 24,9 23,1 26,0 18,8 26,0 28,9
M8 36,6 18,3 25,6 19,4 18,3 22,0 25,6 31,1 31,5 29,3 32,9 23,8 32,9 36,6
M10 58,0 29,0 40,6 30,7 29,0 34,8 40,6 49,3 49,9 46,4 52,2 37,7 52,2 58,0
M12 84,3 42,2 59,0 44,7 42,2 50,6 59,0 71,7 72,5 67,4 75,9 54,8 75,9 84,3
M14 115 57,5 80,5 61,0 57,5 69,0 80,5 97,8 98,9 92,0 104 74,8 104 115
M16 157 78,5 110 83,2 78,5 94,2 110 133 135 126 141 102 141 157
M18 192 96,0 134 102 96,0 115 134 163 165 154 173 125 173 192
M20 245 123 172 130 123 147 172 208 211 196 221 159 221 245
M22 303 152 212 161 152 182 212 258 261 242 273 197 273 303
M24 353 177 247 187 177 212 247 300 304 282 318 229 318 353
M27 459 230 – 243 230 275 321 390 395 367 413 298 413 459
M30 561 281 – 297 281 337 393 477 482 449 505 365 505 561
M33 694 347 – 368 347 416 486 590 597 555 625 451 625 694
M36 817 409 – 433 409 490 572 694 703 654 735 531 735 817
M39 976 488 – 517 488 586 683 830 839 781 878 634 878 976

Test loads for nuts with coarse pitch thread (As, Nenn × Sp in kN)

Thread
d		 Stress area As, Nenn Austenitic steels of property class Steels and nickel alloys
50a 70a 80a KB Y, YK, YB KG GA, GB, GC V, VH, VW S SD SB
M3 5,03 3,16 4,02 4,46 3,29 3,59 4,02 4,71 4,88 3,81 4,88 5,32
M3,5 6,78 4,26 5,42 6,01 4,43 4,84 5,42 6,35 6,58 5,13 6,58 7,17
M4 8,78 5,52 7,02 7,78 5,74 6,27 7,02 8,23 8,53 6,65 8,53 9,28
M5 14,2 8,93 11,4 12,6 9,29 10,1 11,4 13,3 13,8 10,7 13,8 15,0
M6 20,1 12,6 16,1 17,8 13,1 14,4 16,1 18,8 19,5 15,2 19,5 21,2
M7 28,9 18,2 23,1 25,6 18,9 20,6 23,1 27,1 28,1 21,9 28,1 30,5
M8 36,6 23,0 29,3 32,4 23,9 26,1 29,3 34,3 35,5 27,7 35,5 38,7
M10 58,0 36,5 46,4 51,4 37,9 41,4 46,4 54,3 56,3 43,9 56,3 61,3
M12 84,3 53,0 67,4 74,7 55,1 60,2 67,4 79,0 81,9 63,8 81,9 89,1
M14 115 72,3 92,0 102 75,2 82,1 92,0 108 112 87,1 112 122
M16 157 99 126 139 103 112 126 147 152 119 152 166
M18 192 121 154 170 126 137 154 180 186 145 186 203
M20 245 154 196 217 160 175 196 230 238 185 238 259
M22 303 191 242 268 198 216 242 284 294 229 294 320
M24 353 222 282 313 231 252 282 331 343 267 343 373
M27 459 289 – – 300 328 367 430 446 347 446 485
M30 561 353 – – 367 401 449 526 545 425 545 593
M33 694 437 – – 454 496 555 650 674 525 674 734
M36 817 514 – – 534 583 654 766 793 618 793 864
M39 976 614 – – 638 697 781 915 948 739 948 1032
  • a See also footnote b in Table 3 for proof loads higher than in DIN EN ISO 3506-2

Minimum faliure loads for bolts with fine pitch thread (As, Nenn × Rm, min in kN)

Thread d Stress area As, Nenn Austenitic
steels of
property
class		 Steels and nickel alloys
50 70 KB YK, YB KG GA GB GC V VH, VW S SD SB
M8 × 1 39,2 19,6 27,4 20,8 19,6 23,5 27,4 33,3 33,7 31,4 35,3 25,5 35,3 39,2
M10 × 1 64,5 32,3 45,2 34,2 32,3 38,7 45,2 54,8 55,7 51,6 58,1 41,9 58,1 64,5
M10 × 1,25 61,2 30,6 42,8 32,4 30,6 36,7 42,8 52,0 52,6 49,0 55,1 39,8 55,1 61,2
M12 × 1,25 92,1 46,1 64,5 48,8 46,1 55,3 64,5 78,3 79,2 73,7 82,9 59,9 82,9 92,1
M12 × 1,5 88,1 44,1 61,7 46,7 44,1 52,9 61,7 74,9 75,8 70,5 79,3 57,3 79,3 88,1
M14 × 1,5 125 62,5 88 66,3 62,5 75,0 87,5 106 108 100 113 81,3 113 125
M16 × 1,5 167 83,5 117 88,5 83,5 100 117 142 144 134 150 109 150 167
M18 × 1,5 215 108 151 114 108 129 151 183 185 172 194 140 194 215
M18 × 2 204 102 143 108 102 122 143 173 175 163 184 133 184 204
M20 × 1,5 272 136 190 144 136 163 190 231 234 218 245 77 245 272
M20 × 2 258 129 181 137 129 155 181 219 222 206 232 168 232 258
M22 × 1,5 333 167 233 176 165 200 233 283 286 266 300 216 300 333
M22 × 2 318 159 223 169 159 191 223 270 273 254 286 207 286 318
M24 × 2 384 192 269 204 192 230 269 326 330 307 346 250 346 384
M27 × 2 496 248 – 263 248 298 347 422 427 397 446 322 446 496
M30 × 2 621 311 – 329 311 373 435 528 534 497 559 404 559 621
M33 × 2 761 381 – 403 381 457 533 647 654 609 685 495 685 761
M36 × 3 865 433 – 458 433 519 606 735 744 692 779 562 779 865
M39 × 3 1030 515 – 546 515 618 721 876 886 824 927 670 927 1030

Test loads for nuts with fine pitch thread (As, Nenn × Sp in kN)

Thread d Stress
area
As, Nenn		 Austenitic steels of property class Steels and nickel alloys
50 a 70 a 80 a KB YB KG GC VW S SD SB
M8 × 1 39,2 28,4 34,3 37,2 29,3 31,4 34,3 39,0 40,2 32,8 40,2 43,1
M10 × 1 64,5 46,8 56,4 61,3 48,2 51,6 56,4 64,2 66,1 54,1 66,1 71,0
M10 × 1,25 61,2 44,4 53,6 58,2 45,8 49,0 53,6 60,9 62,7 51,3 62,7 67,3
M12 × 1,25 92,1 66,8 80,6 87,5 68,9 73,7 80,6 91,6 94,4 77,2 94,4 101,3
M12 × 1,5 88,1 63,9 77,1 83,7 65,9 70,5 77,1 87,7 90,3 73,8 90,3 96,9
M14 × 1,5 125 90,6 109 119 93,5 100 109 124 128 105 128 138
M16 × 1,5 167 121 146 159 125 134 146 166 171 140 171 184
M18 × 1,5 215 156 188 204 161 172 188 214 220 180 220 237
M18 × 2 204 148 179 194 153 163 179 203 209 171 209 224
M20 × 1,5 272 197 238 258 203 218 238 271 279 228 279 299
M20 × 2 258 187 226 245 193 206 226 257 264 216 264 284
M22 × 1,5 333 241 291 316 249 266 291 331 341 279 341 366
M22 × 2 318 231 278 302 238 254 278 316 326 266 326 350
M24 × 2 384 278 336 365 287 307 336 382 394 322 394 422
M27 × 2 496 360 – – 371 397 434 494 508 416 508 546
M30 × 2 621 450 – – 465 497 543 618 637 520 637 683
M33 × 2 761 552 – – 569 609 666 757 780 638 780 837
M36 × 3 865 627 – – 647 692 757 861 887 725 887 952
M39 × 3 1030 747 – – 770 824 901 1025 1056 863 1056 1133
  • a See also footnote b in Table 3 for proof loads higher than in DIN EN ISO 3506-2.

DIN 267 Bolting Surface Treatment Specifications

DIN 267 Bolting Components Marking

Product Shall be Marked with our manufacturing trade mark "TorqBolt" or "TB" along with the designated Grade.
Grade and manufacturer’s identification symbols shall be applied to one end of studs and to the heads of bolts and screws of all sizes. (If the available area is inadequate, the grade symbol may be marked on one end and the manufacturer’s identification symbol marked on the other end.) For bolts and screws smaller than 1⁄4 in. [6 mm] in diameter and studs smaller than 3⁄8 in. [10 mm] in diameter and for 1⁄4 in. [6 mm] in diameter studs requiring more than a total of three symbols, the marking shall be a matter of agreement between the purchaser and the manufacturer.

Grade Number Marking
DIN 267 X12Ni5 1.568 TB KB
DIN 267 C35E 1.1181 TB Y
DIN 267 C35E 1.1181 TB YK
DIN 267 35B2g 1.5511 TB YB
DIN 267 25CrMo4 1.7218 TB KG
DIN 267 42CrMo4 1.7225 TB GC
DIN 267 21CrMoV5-7 1.7709 TB GA
DIN 267 40CrMoV4 6 1.7711 TB GB
DIN 267 X22CrMoV12-1 1.4923 TB V
DIN 267 X22CrMoV12-1 1.4923 TB VH
DIN 267 X19CrMoNbVN11-1 1.4913 TB VW
DIN 267 X7CrNiMoBNb16-16 1.4986 TB S
DIN 267 X6NiCrTiMoVB25-15-2 1.498 TB SD
DIN 267 NiCr20TiAl 2.4952 TB SB