40Cr steel pipe is one of the most widely used structural steels. Because of its good mechanical properties, 40Cr steel pipe is widely used in the production of important quenching and tempering mechanical parts, such as gear bushings, connecting rods, screws, intake valves, etc., and mold manufacturing industries such as medium-sized plastic molds and mold frames.
Mould structural parts. After tempering and tempering, 40Cr steel pipe has good comprehensive mechanical properties, low temperature impact toughness and low notch sensitivity.
In addition to quenching and tempering, 40Cr steel pipe is also suitable for nitriding and high-frequency quenching. 40Cr steel pipe has good hardenability, water quenching can reach 28 ~ 60mm, oil quenching can reach 15 ~ 40mm. At 174 ~ 229HBS, the relative workability is 60%.
