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Active Fillet Weld Height Specification

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Active Fillet Weld Height Specification

The active fillet weld height specification is the largest isosceles triangle which may be inscribed with the theoretical weld cross-section.

The theoretical fillet weld size height approximately specifies a = .7 as given by trigonometry, where z is the fillet weld width.  The minimum fillet weld height should be selected based on the actual thickness of the thickest weld part and the strength of the material.

Recommended Minimum Fillet Height Chart

Thickest Welded Part Minimum Fillet Weld Thickness [mm] fro Steel
Over To 370 - 420 MPa 520 MPa
- 10 3 4
10 20 4 5
20 30 6 7
30 50 7 9
50 9 10

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