S9074-AR-GIB-010/278
SH 9320
11. ALLIED PROCESSES
11.5.1.2 Torque testinq. Studs shall be tested by torquing until a tensile load equivalent to 80 plus 10 or minus 0 percent of the yield strength of the stud material is applied. Production studs shall be tested. The stud cross section at the stud base or root of the threads. whichever is less. shall be used as the basis for determining the required load. Any convenient means. such as placing a sleeve and washer over the stud and tightening a nut with a calibrated torque wrench. may be used to achieve the required axial load. To ensure that the weld is loaded primarily in tension. the stud threads and nut-washer interface shall be clean. free of burrs and lubricated with a graphite base. or a comparable lubricant (do not use molybdenum disulfide on studs of (or studs welded to) high strength low alloy steels such as 4140. 4340. HY/HSLA where stress corrosion cracking might occur). The tensile loads and torque values specified in Table XII be used when the listed yield strengths and dimensions apply.
Original 102
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