AISI 4140 is a chromium-molybdenum alloy steel. The chromium content provides good hardness penetration, and the molybdenum content ensures uniform hardness and high strength. AISI 4140 ...
AISI 1045 steel has limited through-hardening capability, with sections up to approximately 60 mm suitable for tempering and through-hardening. However, it can be effectively flame or ...