42CrMo/4140/SCM440
It’s one kinds of high quality alloy structural steel.
Features: With high intensity ,high hardenability.It has a small distortion afer quenching , a ghigh creep strength and lasting intensity afer processing of high tempreature.
Chemical composition:C??/span>0.38-0.45%,Si??/span>0.17-0.37%,Cr??/span>0.90-1.20%,Mn??/span>0.50-0.80%,Mo??/span>0.15-0.25%??/span>S??/span>P≤0.035%??/span>Ni??/span>Cu≤0.030%
Usage: It’s mainly used for making various kinds of machinery,automobile,mining spare part,the gearwheel of the engine,the driving gear of supercharger,the abckshaft,the conncetingrob and the pinchock under the high pressure.
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