Spot Weld Shear Strength Calculator
Nugget size and shear strength for resistance spot welds in sheet.
The 5√t nugget rule makes the sheet tear before the nugget shears — the ductile failure you want. Peel tests on scrap coupons verify it in seconds before a production run.
Formula
Note: Static estimate with safety factor 1.7; fatigue-critical spots need test data.
Spot Weld Shear Strength Calculator is a free spot weld strength for welding engineers, fabricators and CWI inspectors — instant, accurate and 100% client-side, with the governing formula and reference shown next to the result so the number can be defended, not just quoted.
About Spot Weld Shear Strength Calculator
Nugget size and shear strength for resistance spot welds in sheet. The calculation implements d = 5√t (AWS); shear ≈ 2.5·t·d·f_u/SF (AWS D8.1/D17.2; RWMA practice). The 5√t nugget rule makes the sheet tear before the nugget shears — the ductile failure you want. Peel tests on scrap coupons verify it in seconds before a production run.
How to use Spot Weld Shear Strength Calculator
- 1Enter Thinner sheet thickness in mm.
- 2Enter Sheet tensile strength in MPa.
- 3Enter Number of spots.
- 4Read Recommended nugget Ø (5√t), Shear per spot, Joint capacity instantly — no submit button needed.
- 5Need US units? Flip the SI/Imperial toggle and every field converts.
Why use Spot Weld Shear Strength Calculator?
- ✓Implements the standard formula — d = 5√t (AWS); shear ≈ 2.5·t·d·f_u/SF
- ✓Reference cited on-page: AWS D8.1/D17.2; RWMA practice
- ✓One-click SI ⇄ Imperial toggle — values convert in place, physics stays in SI
- ✓Runs entirely in your browser — nothing uploaded, free forever
Frequently asked questions
What formula does the Spot Weld Shear Strength Calculator use?+
It computes d = 5√t (AWS); shear ≈ 2.5·t·d·f_u/SF, per AWS D8.1/D17.2; RWMA practice. The formula is displayed under the result.
What should I keep in mind when using this calculator?+
The 5√t nugget rule makes the sheet tear before the nugget shears — the ductile failure you want. Peel tests on scrap coupons verify it in seconds before a production run. Note: Static estimate with safety factor 1.7; fatigue-critical spots need test data.
Does this follow AWS/IS welding codes?+
Each tool implements the formula from the cited code or handbook (AWS D1.1, IS 800, ISO/EN). Qualified WPS values always govern over any calculator for code work.
Is the Spot Weld Shear Strength Calculator free to use?+
Yes — completely free, no sign-up, no limits. It runs client-side in your browser, so inputs stay private and results are instant even on slow connections.
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