Hardness levels above ________ are highly susceptible to hydrogen stress cracking (HF).Time-to-failure decreases as the hardness increases.

Hardness levels above ________ are highly susceptible to hydrogen stress cracking (HF).Time-to-failure decreases as the hardness increases.
A . 225 BHN
B . 237 BHN
C . 241 BHN
D . 247 BHN

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Answer: B