Alloy Steel 40Cr is a medium-carbon chromium steel with much better hardenability than plain 45 steel, reaching at least 980 MPa tensile strength after quenching and tempering, suited to shafts and gears.
Alloy Steel 40Cr (GB/T 3077) is a medium-carbon chromium steel, with significantly better hardenability than plain 45 steel.
40Cr is a medium-carbon chromium steel that is engineered for quenching and tempering, and it has no molybdenum, so it is cost effective for ambient-temperature use but isn’t a heat-resistant alloy.
Alloy Steel 40Cr is commonly used for shafts, gears, high-strength fasteners, and automotive components.