本文件规定了测定金属材料平板产品（薄板和带材）拉伸应变硬化指数的方法。 该方法仅适用于塑性范围内的应力-应变曲线的连续单调部分（见8.4）。 对于加工硬化范围内具有锯齿形应力-应变曲线的材料（显示Portevin-Le Chatelier效应的材料，例如AlMg合金），使用自动测定（对数真实应力与对数真实塑性应变的线性回归，见8.7）给出可再现的结果。购买本文件时可获得的所有当前修订均包含在购买本文件中。

This document specifies a method for determining the tensile strain hardening exponentnof flat products (sheet and strip) made of metallic materials. The method is valid only for that part of the stress-strain curve in the plastic range where the curve is continuous and monotonic (see 8.4). In the case of materials with a serrated stress-strain curve in the work hardening range (materials which show the Portevin-Le Chatelier effect, e.g. AlMg-alloys), the automatic determination (linear regression of the logarithm true stress vs. the logarithm true plastic strain, see 8.7) is used to give reproducible results.All current amendments available at time of purchase are included with the purchase of this document.