本文件规定了将在各种比例和非比例标距长度上获得的室温断裂后伸长率百分比转换为其他标距长度的方法。 当应用于抗拉强度范围为450至750的奥氏体不锈钢时，转换所基于的公式（1）被认为是可靠的？N/mm2且在溶液处理条件下。 这些转换不适用于: a)冷压钢； b)淬火和回火钢； c)非奥氏体钢。 当标距长度超过25√S0或试验片的宽厚比超过20时，这些换算不适用。

This document specifies a method of converting room temperature percentage elongations after fracture obtained on various proportional and non-proportional gauge lengths to other gauge lengths. Formula (1), on which conversions are based, is considered to be reliable when applied to austenitic stainless steels within the tensile strength range 450 to 750？N/mm² and in the solution treated condition. These conversions are not applicable to: a) cold reduced steels; b) quenched and tempered steels; c) non-austenitic steels. These conversions are not applicable when the gauge length exceeds 25√S₀ or where the width to thickness ratio of the test piece exceeds 20.