Shear Strength

Shear strength refers to the ability of a material to resist failure under shear force, i.e., the maximum shear force per unit area that a material can withstand, typically measured in MPa (megapascals) or psi (pounds per square inch). In foreign trade, this term is commonly found in technical specifications, quality inspection reports, and procurement contracts for products such as metals, plastics, adhesives, and composites, used to evaluate material performance under shear loading. Usage scenarios include: customers requesting suppliers to provide shear strength test data, contracts specifying minimum shear strength values, and quality claims arising from substandard shear strength. Note: Shear strength values measured by different test standards (e.g., ASTM D732, ISO 4587) may vary, so the test method must be clearly specified in the contract; shear strength is different from tensile strength and compressive strength and must not be confused. The difference from 'shear modulus' is that shear strength is the failure limit, while shear modulus is a stiffness indicator in the elastic stage. Foreign trade practitioners should ensure that technical parameters are consistent with standards to avoid disputes caused by misunderstandings of terminology.