Alloy Steel ------ 20CrMnMo 
 Description: 20CrMnMo (GB/T3077-1999) ω /% 
 Chemical composition: 
 C Si Cr Mn Mo V Ni Ni-P P W W S S 
 0.17-0.23 0.17-0.37 1.10-1.40 0.90-1.20 0.20-0.30 


 Performance and application: 
 Penetration of advanced high strength steel, plastic and slightly lower toughness, after quenching and tempering has good mechanical properties and low temperature impact toughness, after carburizing high bending strength and wear resistance, before welding is not Well, to be heated before welding, after welding to be tempered, machinability and hot workability is good. 
 Uses: 
 Commonly used in the manufacture of high hardness, high strength, high toughness of the larger pieces of important carburizing