What Is Superficial Hardness?

Superficial Hardness

Superficial hardness refers to steel or other materials that has been treated to achieve a specific hardness on the surface while maintaining a softer core. This is typically done through processes like case hardening or surface hardening, which increases the steels resistance to wear, abrasion, and fatigue without compromising its toughness. Superficial hardness is especially beneficial for uses where surface durability is critical, for example gears, shafts, and bearings, while still allowing the material to maintain the flexibility and strength needed in the inner core.