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Arc Stud Welding - Technical Information

Threaded Load Strengths Construction Specs Fastener Design Ratio Arc Welding Guidelines

Threaded Load Strengths

Standard Mild Steel Arc Welding Studs- Mechanical Properties
Steel Properties Min. Tensile Strength 61,000 psi. Min. Yield Strength 49,000 psi.

Stud Thread Diameter Max. Shear in lbs.** Yield Load in lbs. Ultimate Load in lbs. Yield Torque* Ultimate Torque* Recommended Tightening Torque***
10-24 UNC 746 830 1,030 33 in-lbs. 36 ft-lbs. 24 in-lbs.
1/4-20 UNC 1,390 1,550 1,900 6 ft-lbs. 7 ft-lbs. 5 ft-lbs.
5/16-18 UNC 2,300 2,560 3,190 13 ft-lbs. 15 ft-lbs. 12 ft-lbs.
3/8-16 UNC 3,400 3,800 4,700 24 ft-lbs. 27 ft-lbs. 21 ft-lbs.
7/16-14 UNC 4,650 5,200 6,400 38 ft-lbs. 42 ft-lbs. 33 ft-lbs.
1/2-13 UNC 6,200 6,900 8,650 59 ft-lbs. 65 ft-lbs. 51 ft-lbs.
5/8-11 UNC 9,900 11,000 13,780 118 ft-lbs. 130 ft-lbs. 101 ft-lbs.
3/4-10 UNC 14,600 16,300 20,300 209 ft-lbs. 230 ft-lbs. 189 ft-lbs.
7/8-9 UNC 20,200 22,600 28,100 337 ft-lbs. 370 ft-lbs. 288 ft-lbs.
1-8 UNC 26,600 29,600 36,900 505 ft-lbs. 555 ft-lbs. 432 ft-lbs.


*Note Many variables affect the torque results such as steel strength, thread finish, lubrication, washers, and hardness.
**Shear strength here represents results when stud is subjected to pure shear without any bending moment present.
*** Recommended tightening torque data represents 75% of the yield torque figures.


Standard Stainless Steel Arc Welding Studs- Mechanical Properties
Stainless steel properties Tensile Strength 70,000 psi min. Yield Strength 35,000 psi. min. (annealed)

Stud Thread Diameter Max. Shear in lbs.** Yield Load in lbs. Ultimate Load in lbs. Yield Torque* Ultimate Torque* Recommended Tightening Torque***
10-24 UNC 850 590 1180 24 in-lbs. 35 in-lbs. 17 in-lbs.
1/4-20 UNC 1600 1100 2220 4.3 ft-lbs. 7 ft-lbs. 3.5 ft-lbs.
5/16-18 UNC 2640 1830 3660 9 ft-lbs. 14 ft-lbs. 7 ft-lbs.
3/8-16 UNC 3900 2700 5400 17 ft-lbs. 27 ft-lbs. 13 ft-lbs.
7/16-14 UNC 5350 3700 7440 27 ft-lbs. 44 ft-lbs. 20 ft-lbs.
1/2-13 UNC 7150 4950 9900 42 ft-lbs. 66 ft-lbs. 32 ft-lbs.
5/8-11 UNC 11300 7900 15800 84 ft-lbs. 135 ft-lbs. 64 ft-lbs.
3/4-10 UNC 16800 11600 23300 148 ft-lbs. 230 ft-lbs. 111 ft-lbs.
7/8-9 UNC 23200 16199 32300 241 ft-lbs. 387 ft-lbs. 181 ft-lbs.
1-8 UNC 30500 21200 42400 361 ft-lbs. 580 ft-lbs. 271 ft-lbs.

*Note Many variables affect the torque results such as steel strength, thread finish, lubrication, washers, and hardness and the high elongation typical in annealed stainless steel.
**Shear strength here represents results when stud is subjected to pure shear without any bending moment present.
*** Recommended tightening torque data represents 75% of the yield torque figures.


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