Through Hardened Steel
As the name suggests, through-hardened steel is a heat treatment where the material benefits from being uniformly hardened to the core instead of just on the surface.
Often referred to as 'neutral hardening', through-hardening increases the hardness and tensile stress of the material. The material differs from nitriding steel which only has a thin, protective outer layer.
- Consistent strength throughout
- Relatively low cost
- Improved hardness, wear resistance and strength
- Hardness levels adjustable via tempering
Heat Treatment Process:
Through-hardening occurs when the material is heated in a furnace before being quenched with a coolant such as water or oil. The quenching process locks in the hardness of the material before subsequent tempering, where the material is re-heated and then allowed to cool gradually.
General fracture risks are increased due to reduced ductility.