Damping hardness is one of dynamic hardness, and is measured by the Herbert hardness tester. The Herbert hardness tester is a typical pendulum hardness tester. The tester swings on a specimen. The hardness is defined by the free damping oscillation of the tester. In order to clarify relationship between damping hardness and tensile properties for metals, the tensile test and Herbert hardness test are carried out for eight kinds of metals. Conclusions are follows: (1) Damping hardness is strongly and negatively correlated with 0.2% proof stress and ultimate tensile strength. (2) Damping hardness is negatively correlated with Young's modulus.
