40MnB Alloy Steel Rod 30mm Diameter AISI 10mm Stainless Steel Rod

40MnB Alloy Round Rod 25mm 30mm Diameter Hot Rolled Steering Shaft Steering Axle

This is a new steel to replace 40Cr steel is more successful, it has higher strength, hardness, wear resistance and good toughness, its hardenability is slightly higher than 40Cr, in the oil critical quenching diameter of 18 ~ 33mm; After normalizing, the machinability is good, and the process properties of cold drawing, wire rolling, tapping, forging and heat treatment are also good. At high temperature, the grain growth, oxidation, decarbonization tendency and quenching deformation tendency are small. But there is tempering brittleness, tempering stability is slightly worse than 40Cr steel.