抗拉強度、屈服強度及淬透性均比40號鋼高，但焊接性有限，有形成裂紋的傾向。具有很好的綜合力學性能。

熱處理規范：淬火850℃,油冷；回火520℃,水冷、油冷。

交貨狀態：以熱處理（正火、退火或高溫回火）或不熱處理狀態交貨，交貨狀態應在合同中注明。

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Tensile strength, yield strength, and hardenability are higher than that of No. 40 steel, but weldability is limited and there is a tendency to form cracks. Has a good comprehensive mechanical properties.

Heat treatment specification: quenching 850 ° C, oil cooling; tempering 520 ° C, water cooling, oil cooling.

Delivery status: Delivery by heat treatment (normalizing, annealing or high temperature tempering) or no heat treatment, the delivery status should be stated in the contract.