Which hardness scale is unaffected by the metal's ductility?
Explanation
The KNH (Knoop Hardness Number) is unique because it measures hardness without being influenced by the metal's ductility, unlike other hardness scales such as VHN, RHN, or BHN.
The KNH (Knoop Hardness Number) is unique because it measures hardness without being influenced by the metal's ductility, unlike other hardness scales such as VHN, RHN, or BHN.