DIN EN ISO 643-2017

Steel - Micrographic determination of the apparent grain size (ISO/DIS 643:2017); German and English version prEN ISO 643:2017

DIN EN ISO 643-2017 发布历史

This International Standard specifies a micrographic method of determining apparent ferritic or austenitic grain size in steels. It describes the methods of revealing grain boundaries and of estimating the mean grain size of specimens with unimodal size distribution. Although grains are three-dimensional in shape, the metallographic sectioning plane can cut through a grain at any point from a grain corner, to the maximum diameter of the grain, thus producing a range of apparent grain sizes on the two-dimensional plane, even in a sample with a perfectly consistent grain size.

DIN EN ISO 643-2017由德国标准化学会 DE-DIN 发布于 2017-09-00。

DIN EN ISO 643-2017在国际标准分类中归属于: 77.040.99 金属材料的其他试验方法。

DIN EN ISO 643-2017的历代版本如下：

• 2003年09月 DIN EN ISO 643-2003 钢.表观粒度的显微照相测定法
• 2012年09月01日 DIN EN ISO 643-2012 钢.表观粒度的显微照相测定法(ISO/FDIS 643-2012).德文版本FprEN ISO 643-2012
• 2013年05月 DIN EN ISO 643-2013 钢.表观粒度的显微照相测定法(ISO 643-2012).德文版本EN ISO 643-2012
• 1970年01月 DIN EN ISO 643-2017 钢.表观粒度的显微照相测定法(ISO/DIS 643-2017);德文版本prEN ISO 643-2017

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标准号

DIN EN ISO 643-2017

发布日期

2017年09月

实施日期

废止日期

无

国际标准分类号

77.040.99

发布单位

DE-DIN

被代替标准

DIN EN ISO 643-2015

适用范围

This International Standard specifies a micrographic method of determining apparent ferritic or austenitic grain size in steels. It describes the methods of revealing grain boundaries and of estimating the mean grain size of specimens with unimodal size distribution. Although grains are three-dimensional in shape, the metallographic sectioning plane can cut through a grain at any point from a grain corner, to the maximum diameter of the grain, thus producing a range of apparent grain sizes on the two-dimensional plane, even in a sample with a perfectly consistent grain size.

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