题目内容

Because cooling rate was too high, underbead cracks occurred in socket/pipe weldment.

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Underbead cracks occurred in oil engine connecting rod because heat dissipation area was large and cooling rate was too high.

Plain low carbon steels are susceptible to hydrogen induced cracking.

Comparing with low carbon steels, high carbon steels are with better weldability.

It is advisable to take advantage of auto-tempering to avoid hydrogen induced cracking in HTLA steels welding.