Standard: GB / T 3077-1999

Main Features
This is a high strength quenched and tempered carbon steel, it has high strength, elasticity and abrasion resistance, while also higher hardenability, quenching in oil the critical diameter of 10 ~ 28mm, the critical quenching in water diameter 24 ~ 49mm, machinability fair. After this steel quenched and high mechanical properties can be obtained, but the sensitivity of overheating during heat treatment and tempering brittleness, water quenching, also have a tendency to crack, and the white spot sensitive, poor welding, cold plastic deformation is low.