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Hot cracks can be prevented by __________

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in Design of Steel Structures by (962k points)
Hot cracks can be prevented by __________

(a) faster cooling

(b) non uniform heating

(c) pre-heating

(d) slower cooling

This question was addressed to me in my homework.

Asked question is from Weld Defects & Types of Joints topic in division Welded Connections of Design of Steel Structures

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Correct answer is (d) slower cooling

Explanation: Hot cracks form as weld begin to solidify and are caused by brittle constituents (presence of sulphur, carbon, silicon and hydrogen). They can be prevented by more uniform heating and slower cooling.

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