GB/T 5028-1999 in English

本标准规定了金属薄板和薄带拉伸应变硬化指数(n值）试验方法的定义、符号、原理、试验设备、试样、试验程序、计算和试验报告。本标准适用于厚度为0.1~3mm金属薄板和薄带拉伸应变硬化指数(n值)的测定。本标准仅适用于均匀塑性变形范围内应力-应变曲线呈单调连续的部分

Scope

This standard specifies the definition, symbols, principles, test equipment, test specimens, test procedures, calculations and test reports of test methods for tensile strain hardening exponent (n value) of metal sheets and strips. This standard applies to the determination of the tensile strain hardening exponent (n value) of metal sheets and strips with a thickness of 0.1-3mm. This standard is only applicable to the part where the stress-strain curve is monotonously continuous within the range of uniform plastic deformation.