Which of the following materials necessitates preheating in welding?
A)copper
B)aluminium
C)cast iron
D)stainless steel

Name: Which of the following materials necessitates preheating in welding? A)copper B)aluminium C)cast iron D)stainless steel
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Question

Quizplus · Accepted Answer

Preheating is often required for cast iron before welding to slow the cooling rate and prevent cracking. Cast iron has a high carbon content, which can lead to hard, brittle microstructures if cooled too quickly.

Which of the Following Materials Necessitates Preheating in Welding