Aerospace Spot Weld Shear Strength: steel nickel cobalt
steel ftu above185 t0040 to steel ftu above220 t0040
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.
| material family | record id | design shear strength lbs (lbf) | material ftu range ksi | sheet thickness in (in) | standard | tensile allowable lbs (lbf) | tensile allowable note | weld spec |
|---|---|---|---|---|---|---|---|---|
| steel nickel cobalt | steel ftu above185 t0040 | 600 | above 185 | 0.04 | MIL-HDBK-5J Section 8.2.2.3 | 150 | 25% of shear strength | MIL-W-6858 |
| steel nickel cobalt | steel ftu above185 t0050 | 800 | above 185 | 0.05 | MIL-HDBK-5J Section 8.2.2.3 | 200 | 25% of shear strength | MIL-W-6858 |
| steel nickel cobalt | steel ftu above185 t0063 | 1,040 | above 185 | 0.063 | MIL-HDBK-5J Section 8.2.2.3 | 260 | 25% of shear strength | MIL-W-6858 |
| steel nickel cobalt | steel ftu above185 t0080 | 1,360 | above 185 | 0.08 | MIL-HDBK-5J Section 8.2.2.3 | 340 | 25% of shear strength | MIL-W-6858 |
| steel nickel cobalt | steel ftu above185 t0100 | 1,760 | above 185 | 0.1 | MIL-HDBK-5J Section 8.2.2.3 | 440 | 25% of shear strength | MIL-W-6858 |
| steel nickel cobalt | steel ftu above185 t0125 | 2,280 | above 185 | 0.125 | MIL-HDBK-5J Section 8.2.2.3 | 570 | 25% of shear strength | MIL-W-6858 |
| steel nickel cobalt | steel ftu above185 t0160 | 2,960 | above 185 | 0.16 | MIL-HDBK-5J Section 8.2.2.3 | 740 | 25% of shear strength | MIL-W-6858 |
| steel nickel cobalt | steel ftu above220 t0025 | 380 | above 220 | 0.025 | MIL-HDBK-5J Section 8.2.2.3 | 95 | 25% of shear strength | MIL-W-6858 |
| steel nickel cobalt | steel ftu above220 t0032 | 520 | above 220 | 0.032 | MIL-HDBK-5J Section 8.2.2.3 | 130 | 25% of shear strength | MIL-W-6858 |
| steel nickel cobalt | steel ftu above220 t0040 | 680 | above 220 | 0.04 | MIL-HDBK-5J Section 8.2.2.3 | 170 | 25% of shear strength | MIL-W-6858 |
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