Page 130 - Practical Machinery Management for Process Plants Major Process Equipment Maintenance and Repair

Tgble 2-5
Torque Values for Threadad Fasteners
Torque (R-ibs)
Size -tegory-l(1) categorY-ll(2)
318-16UNC 16 8
71 1614UNC 27 14
112-13UNC 40 20
91 16-12UNC 60 30
5/8-llUNC 80 40
314-1OUNC 130 65
718-9UNC 210 105
1-8UNC 330 115
1 -118-7UNC 520 260
1-118-8UN 470 240
1 -1/47UNC 730 370
1-1/48UN 670 340
1-318-6UNC 970 490
1-3/8-8UN 910 460
1-112-6UNC 1170 590
I-ll2-8UN 1070 540
1-314-5UNC 2070 1040
1314-8UN 2000 1000
24'h UNC 3000 1500
2-8UN 2930 1470
Notes: (1) Based on approximately 40,oOO psi prestms.
(2) Based on approximately 20,000 psi prestnss.

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Table 2-e
Mechanical Properties of Common Threaded Fastener Materials

Category-I:
Common Approximate Streyh (KSI)
ASTM. No. Name Mln. Yield ensile
A-193 GR B7 4140 105 125
A-193 GR. B6 410 85 110
A-193 GR. B16 Cr-Mo-V 105 125
A-193 GR. B5 501 80 100
A-325 TP. 1 1030 81 105
A-354 GR. BD Alloy Steel 78 90
A453 GR. 651 CI. A Stainless Steel 70 100

category-11:
Common ADDroximate Strength (KSI)
ASTM. No. Name in. Yleld Tensile
A-576 GR. 1018 1018 __ 58
32
A-193 GR. B8 CI. 1 304 30 75
A-320 GR. B8 C1. 1 304 30 75
A479 GR. 302 302 30 75
A419 GR. 304 305 30 75
A379 GR. 316 3 16 30 75
A479 GR. 410 410 (Annealed) 40 70
8-98 Alloy C 66100 Sil. BIZ. (H02 Temper) 38 70
._
B-150 Alloy C 64200 AI. Brz. 45 85
B-164 Alloy N O4400 Monel (Annealed) 25 70
Note: Properties from ASTM 1982 and 1983 editions. Properties vary with fhstener size
and hear treatment.