The hardening is made mainly for conferring a
protection of the surface against mechanical
strokes or blows (ex. equipment for mining or rock
drilling, constantly stroked by pebbles and dust).
The surface does not withstand a high, direct and
continuous pressure (like ball bushing), but only
20MnV6 steel grade offers better weldability, enhanced mechanical characteristics, impact resistance even at lower temperatures (-20°C).
42CrMo4+QT steel offers high harden ability and good toughness, being an excellent material for the oil and gas industry and automotive engineering.
38MnVS6 has excellent machinability, good weldability being widely used in civil, mechanical and chemical engineering applications.