ObjectiveMcq
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In welding the strength of the joint piece could be?
Correct Answer: C — Equal or Greater than that of parent metal
The strength of perfectly welded joint is more than the parent metal, due to the formation of alloy. The alloy formation at the welded portion makes it the strongest portion while the nearby zones where uncontrolled cooling take place because of heat is the weakest zone (heat affected zone). In general we can say that on the basis of strength: welded portion > parent material > heat affected zone.