ASTM A193 Grade B8T Stud Torque Chart

ASTM A193 Grade B8T Torque Chart

u = The coefficient of friction of the lubricant
Figures are a GUIDE only, always consult the manufacturer or area engineer

Torque Chart for ASTM A193 Grade B8T Studs in Ft./Lbs. at 100% of yield

Bolt Diameter Nut Size Moly Lube Nickel Lube Copper Lube Machine Oil Dry
    u=0.085 u=0.110 u=0.100 u=0.160 u=0.400
3/4" 1-1/4" 208 342 314 448 1118
7/8" 1-7/16" 330 544 500 716 1786
1" 1-5/8" 490 810 746 1066 2664
1-1/8" 1-13/16" 702 1170 1076 1544 3888
1-1/4" 2" 966 1622 1492 2150 5440
1-3/8" 2-3/16" 1288 2180 2000 2894 7356
1-1/2" 2-3/8" 1674 2850 2614 3792 9274
1-5/8" 2-9/16" 2142 3668 3364 4890 12520
1-3/4" 2-3/4" 2676 4602 4218 6144 15776
1-7/8" 2-15/16" 3292 5682 5204 7596 19550
2" 3-1/8" 3994 6920 6334 9260 23884
2-1/8" N/A 4790 8324 7618 11150 28816
2-1/4" 3-1/2" 5686 9906 9068 13282 34382
2-3/8" N/A 6686 11676 10678 15668 40620
2-1/2" 3-7/8" 7796 13646 12476 18324 47536
2-3/4" 4-1/4" 9382 16488 15066 22170 57692
3" 4-5/8" 13974 21464 19606 28894 75340
3-1/4" 5" 15470 27352 24976 36856 96258
3-1/2" 5-3/8" 19312 34226 31244 46158 120730
3-3/4" 5-3/4" 23742 42168 38482 56906 149032
4" 6-1/8" 27262 48590 44324 65652 172292
4-1/4" 6-1/2" 28802 51248 46758 69206 181440
4-1/2" 6-7/8" 32348 57742 52664 78058 205026

Torque Chart for ASTM A193 Grade B8T Studs in Ft./Lbs at 70% of yield

Bolt Diameter Nut Size Moly Lube Nickel Lube Copper Lube Machine Oil Dry
    u=0.085 u=0.110 u=0.100 u=0.160 u=0.400
3/4" 1-1/4" 145 239 219 313 782
7/8" 1-7/16" 231 380 350 501 1250
1" 1-5/8" 343 567 522 746 1864
1-1/8" 1-13/16" 491 819 753 1080 2721
1-1/4" 2" 676 1135 1044 1505 3808
1-3/8" 2-3/16" 901 1526 1400 2025 5149
1-1/2" 2-3/8" 1171 1995 1829 2654 6491
1-5/8" 2-9/16" 1499 2567 2354 3423 8764
1-3/4" 2-3/4" 1873 3221 2952 4300 11043
1-7/8" 2-15/16" 2304 3977 3642 5317 13685
2" 3-1/8" 2795 4844 4433 6482 16718
2-1/8" N/A 3353 5826 5332 7805 20171
2-1/4" 3-1/2" 3980 6934 6343 9297 24067
2-3/8" N/A 4680 8173 7474 10367 28434
2-1/2" 3-7/8" 5457 9552 8733 12862 33275
2-3/4" 4-1/4" 6567 11541 10546 15519 40384
3" 4-5/8" 9781 15024 13724 20225 52738
3-1/4" 5" 10829 19146 17483 25799 67380
3-1/2" 5-3/8" 13518 23958 21870 32310 84511
3-3/4" 5-3/4" 16619 29517 26937 39834 10432
4" 6-1/8" 19083 34013 32730 45956 12700
4-1/4" 6-1/2" 20161 35873 31026 48444 12060
4-1/2" 6-7/8" 22643 40419 36864 54640 14351

Torque Chart for ASTM A193 Grade B8T Studs in Ft./Lbs at 60% of yield

Bolt Diameter Nut Size Moly Lube Nickel Lube Copper Lube Machine Oil Dry
    u=0.085 u=0.110 u=0.100 u=0.160 u=0.400
3/4" 1-1/4" 125 205 188 269 671
7/8" 1-7/16" 198 326 300 430 1072
1" 1-5/8" 294 486 447 640 1598
1-1/8" 1-13/16" 421 702 645 926 2333
1-1/4" 2" 579 973 895 1290 3264
1-3/8" 2-3/16" 773 1308 1200 1736 4414
1-1/2" 2-3/8" 1004 1704 1568 2275 5564
1-5/8" 2-9/16" 1285 2200 2018 2934 7512
1-3/4" 2-3/4" 1605 2761 2530 3686 9465
1-7/8" 2-15/16" 1975 3409 3122 4557 11730
2" 3-1/8" 2396 4152 3800 5556 14330
2-1/8" N/A 2874 4994 4570 6690 17289
2-1/4" 3-1/2" 3411 5943 5437 7969 20629
2-3/8" N/A 4011 7005 6406 9400 24372
2-1/2" 3-7/8" 4677 8187 7485 10994 28521
2-3/4" 4-1/4" 5629 9892 9039 13302 34615
3" 4-5/8" 8384 12878 11763 17336 45204
3-1/4" 5" 9282 16411 14985 22113 57754
3-1/2" 5-3/8" 11587 20535 18746 27694 72438
3-3/4" 5-3/4" 14245 25300 23089 34143 89419
4" 6-1/8" 15301 27227 24842 36767 96397
4-1/4" 6-1/2" 16357 29154 26594 39391 103375
4-1/2" 6-7/8" 19408 34645 31598 46834 123015

Torque Chart for ASTM A193 Grade B8T Studs in Ft./Lbs at 50% of yield

Bolt Diameter Nut Size Moly Lube Nickel Lube Copper Lube Machine Oil Dry
    u=0.085 u=0.110 u=0.100 u=0.160 u=0.400
3/4" 1-1/4" 104 171 157 224 559
7/8" 1-7/16" 165 272 250 358 893
1" 1-5/8" 245 405 373 533 1332
1-1/8" 1-13/16" 351 585 538 772 1944
1-1/4" 2" 483 811 746 1075 2720
1-3/8" 2-3/16" 644 1090 1000 1447 3678
1-1/2" 2-3/8" 837 1425 1307 1896 4637
1-5/8" 2-9/16" 1071 1834 1682 2445 6260
1-3/4" 2-3/4" 1338 2301 2109 3072 7888
1-7/8" 2-15/16" 1646 2841 2602 3798 9775
2" 3-1/8" 1997 3460 3167 4630 11942
2-1/8" N/A 2395 4162 3809 5575 14408
2-1/4" 3-1/2" 2843 4653 4531 6641 17191
2-3/8" N/A 3343 5838 5339 7834 20310
2-1/2" 3-7/8" 3898 6823 6238 9162 23768
2-3/4" 4-1/4" 4691 8244 7533 11085 28846
3" 4-5/8" 6987 10732 9803 14447 37670
3-1/4" 5" 7735 13676 12488 18428 48129
3-1/2" 5-3/8" 9656 17113 15622 23079 60365
3-3/4" 5-3/4" 11871 21084 19241 28453 74516
4" 6-1/8" 13631 24295 22162 32826 86146
4-1/4" 6-1/2" 14401 25624 23379 34603 90720
4-1/2" 6-7/8" 16174 28871 26332 39029 102513

Torque Chart for ASTM A193 Grade B8T Studs in Ft./Lbs at 40% of yield

Bolt Diameter Nut Size Moly Lube Nickel Lube Copper Lube Machine Oil Dry
    u=0.085 u=0.110 u=0.100 u=0.160 u=0.400
3/4" 1-1/4" 83 136 126 179 447
7/8" 1-7/16" 132 217 200 286 714
1" 1-5/8" 196 324 298 426 1066
1-1/8" 1-13/16" 280 468 430 617 1555
1-1/4" 2" 386 649 597 1075 2176
1-3/8" 2-3/16" 515 872 800 1158 2942
1-1/2" 2-3/8" 669 1140 1045 1517 3710
1-5/8" 2-9/16" 857 1467 1345 1956 5008
1-3/4" 2-3/4" 1070 1841 1687 2458 6310
1-7/8" 2-15/16" 1317 2273 2082 3038 7820
2" 3-1/8" 1598 2768 2534 3704 9554
2-1/8" N/A 1916 3329 3047 4460 11526
2-1/4" 3-1/2" 2274 3962 3624 5312 13753
2-3/8" N/A 2674 4670 4271 6267 16248
2-1/2" 3-7/8" 3118 5458 4990 7329 19014
2-3/4" 4-1/4" 3752 6595 6026 8868 23076
3" 4-5/8" 5589 8585 7842 11557 30136
3-1/4" 5" 6188 10940 9990 14742 38503
3-1/2" 5-3/8" 7725 13690 12497 18463 44829
3-3/4" 5-3/4" 9497 16867 15392 28453 59612
4" 6-1/8" 10905 19436 17729 26260 68916
4-1/4" 6-1/2" 11520 20499 18703 27682 72576
4-1/2" 6-7/8" 12939 23096 21065 31232 82010

Torque Chart for ASTM A193 Grade B8T Studs in Ft./Lbs at 30% of yield

Bolt Diameter Nut Size Moly Lube Nickel Lube Copper Lube Machine Oil Dry
    u=0.085 u=0.110 u=0.100 u=0.160 u=0.400
3/4" 1-1/4" 62 103 94 134 335
7/8" 1-7/16" 99 163 150 215 536
1" 1-5/8" 147 243 224 320 799
1-1/8" 1-13/16" 211 351 322 463 1168
1-1/4" 2" 290 486 448 645 1632
1-3/8" 2-3/16" 386 855 600 868 2207
1-1/2" 2-3/8" 502 1426 784 1137 2782
1-5/8" 2-9/16" 642 1100 1009 1467 3767
1-3/4" 2-3/4" 803 1380 1265 1843 4733
1-7/8" 2-15/16" 987 1705 1561 2278 5865
2" 3-1/8" 1198 2076 1900 3345 7165
2-1/8" N/A 1437 2497 2285 3984 8645
2-1/4" 3-1/2" 1706 2972 2719 4700 10310
2-3/8" N/A 2006 3503 3203 5497 12180
2-1/2" 3-7/8" 2339 4094 3743 6651 14260
2-3/4" 4-1/4" 2815 4946 4520 8668 17300
3" 4-5/8" 4192 6439 5882 11057 22600
3-1/4" 5" 4635 8206 7493 13847 28870
3-1/2" 5-3/8" 5793 10268 9373 17072 36210
3-3/4" 5-3/4" 7122 12650 11545 20761 44700
4" 6-1/8" 8641 15374 14027 19695 51680
4-1/4" 6-1/2" 8178 14577 13297 20761 54430
4-1/2" 6-7/8" 9704 17322 15799 23417 61500