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Up to what thickness, can steel be welded using spot welding process?

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in Casting-Forming-Welding II by (119k points)
Up to what thickness, can steel be welded using spot welding process?

(a) 10 mm

(b) 11 mm

(c) 12 mm

(d) 13 mm

I got this question by my school principal while I was bunking the class.

This question is from Resistance Welding Methods in division Welding and Related Processes of Casting-Forming-Welding II

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Correct answer is (c) 12 mm

Easy explanation: In spot welding process, to bring the heated parts in contact with one another, mechanical pressure is applied. This pressure can be of three types, by using foot lever, by providing air pressure or by using a hydraulic cylinder. The use of these methods allows steel or other metal parts to be welded up to a thickness of 12 mm.

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