标准摘要
[中文适用范围]： 规定了主要由单相组成的铜和铜合金的平均晶粒尺寸的三个估算程序和表达规则。 比较程序（将样本与标准图表进行比较）是最方便的，并且对于大多数商业目的来说足够准确。 如果有争议，建议使用具有更高准确度的 Heyn 或 Jeffries 程序（分别为截距程序和平面程序）。 [外文原描述]： Specifies three procedures for estimating, and rules for expressing, the average grain size of copper and copper alloys consisting principally of a single phase. The comparison procedure (comparing the specimen with a standard chart) is most convenient and is sufficiently accurate for most commercial purposes. In cases of dispute the use of the Heyn or Jeffries procedures (intercept procedure and planimetric procedure, respectively) having higher degrees of accuracy is recommended.
英文名称Copper and copper alloys — Estimation of average grain size