Hardness Test

Hardness Test is a common quality inspection term in foreign trade. It refers to measuring a material's resistance to localized plastic deformation (such as indentation or scratching) using specific methods to evaluate its mechanical properties. Use cases include: acceptance of raw materials or finished products such as metals, plastics, and rubber; customers requiring hardness test reports as quality proof; technical specification clauses in contracts. Notes: There are various hardness testing methods (e.g., Brinell HB, Rockwell HRC, Vickers HV, Shore), and different materials require corresponding standards (e.g., ASTM E10, ISO 6506). Test results are affected by specimen thickness, surface roughness, and temperature. Foreign trade contracts should specify the test standard, sampling location, acceptance range, and the party issuing the report. Difference from other terms: Hardness testing differs from tensile testing (which measures strength and ductility) or impact testing (which measures toughness). It is faster, non-destructive or minimally destructive, and is often used for incoming inspection and process control. If the customer only writes 'Hardness Test' without specifying the method, disputes may arise, so it is advisable to detail it in the PI or contract.