20CrNiMo round steel quenching through higher, no temper brittleness, welding is quite good, the formation of cold cracking tendency is small, cutting and cold strain plasticity is good. In the hardening or carburizing and quenching state use.
Commonly used in manufacturing small cars, tractor engine and transmission gear; also used in place of steel 12crni3 carburization of heart, higher performance requirements of manufacturing, cyanide, such as oil drilling and metallurgical open pit mine roller bit tooth and claw and cone body. 20CrNiMo because it contains molybdenum in addition to good comprehensive performance can be resistant to a certain temperature. Used in the manufacture of turbine gear whole rotor internal combustion engine connecting rod valve section forging.