钢.伸长值的转换.第1部分:碳钢和低合金钢

[中文适用范围]： 本文件规定了一种将在各种比例和非比例标距上获得的断裂后室温百分比伸长率转换为其他标距长度的方法。 当应用于抗拉强度范围为 300 N/mm2 至 700 N/mm2 的碳钢、碳锰钢、钼钢和铬钼钢以及热轧钢时，公式 (1) 被认为是可靠的。 热轧和正火或退火条件，带或不带回火。 这些换算不适用于： a) 冷轧钢； b) 调质钢； c) 奥氏体钢。 当标距长度超过 25 S0 或试件的宽厚比超过 20 时，这些换算不适用。 [外文原描述]： 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 carbon, carbon manganese, molybdenum and chromium molybdenum steels within the tensile strength range 300 N/mm 2 to 700 N/mm 2 and in the hot-rolled, hot-rolled and normalized or annealed conditions, with or without tempering. These conversions are not applicable to: a) cold reduced steels; b) quenched and tempered steels; c) austenitic steels. These conversions are not applicable when the gauge length exceeds or where the width to thickness ratio of the test piece exceeds 20.