(A) 0.2 (
)
(B) 0.4 (X)
(C) 0.6 (X)
(D) 0.8 (X)
Answers: The minimum carbon content in steel should be 0.2 percent for it to respond to a hardening treatment.
The minimum carbon content in steel should be ____________________ percent for it to respond to a hardening treatment ?
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