Direct hardening can be performed on steel containing at least ____ percent of carbon.
A) 0.1
B) 0.2
C) 0.3
D) 0.4

Name: Direct hardening can be performed on steel containing at least ____ percent of carbon. A) 0.1 B) 0.2 C) 0.3 D) 0.4
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Question

Quizplus · Accepted Answer

Direct hardening is effective on steels with a minimum carbon content of 0.3 percent, as this amount of carbon allows for the formation of martensite upon quenching, which is necessary for the hardening process.

Direct Hardening Can Be Performed on Steel Containing at Least