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Whats Stronger a Spot Weld or a MAG Weld On THLE Steels?
Illustrating the shear strength of a spot weld compared to a MIG plug weld in THLE Steel ( very high elastic limit MPa = 400 <Re <600 MPa).
The test, In this case, illustrated that the spot weld had an Ultimate Tensile Strength of 3261Kg compared to 1294Kg for an 8mm MIG plug weld.
The test highlights that if performed correctly a spotweld is, in fact, stronger than a MIG weld in THLE steel at a thickness of 2.5mm
Without getting too technical let's have a quick look at why this may be on HLSE.
Peel Tests and Spot welding AHSS Steels
Many spot welding machines now have Auto selection modes that will assess the type, resistance, and thickness of the steel stack to be welded, this enables greater quality in theory but still requires the welder operator to perform a destructive( peel) test and observe visual weld size characteristics.
Welding Fume New HSE Rules
New research from the HSE has found welding fume is a carcinogen and therefore requires employers and employees to make adequate protection available