Aerospace Spot Weld Shear Strength

Design-allowable shear load per spot (lbs) for resistance spot welds per MIL-HDBK-5J Section 8.2.2.3 and MIL-W-6858. Indexed by material family (aluminum alloy, steel/nickel/cobalt alloy, magnesium alloy, titanium alloy), parent metal Ftu range (ksi), and sheet thickness (in). Tensile allowable is 25% of shear strength. Covers thicknesses 0.020–0.160 in. No filler metal — allowable is empirical load-per-spot based on sheet thickness and parent metal ultimate tensile strength.