45MnMo features for its high strength and hardness, good weldability, toughness, machinability and so on.
Compared with 40Cr steel, 34CrMo4 steel has higher harden-ability. 34CrMo4 steel has high creep strength in high temperature, and it can work in 500℃ temperature. Its plasticity is ordinary in cold deformation, and its weld-ability is not very well.
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