BS EN 10247-2007 使用标准图片对钢的非金属夹杂物含量的显微图检验

标准号：BS EN 10247-2007
中文标准名称：使用标准图片对钢的非金属夹杂物含量的显微图检验
英文标准名称：Micrographic examination of the non-metallic inclusion content of steels using standard pictures
标准类型：H11
发布日期：2007/5/31 12:00:00
实施日期：2007/5/31 12:00:00
中国标准分类号：H11
国际标准分类号：77.040.99
引用标准：EN ISO/IEC 17025
适用范围：This European Standard defines a method of microscopic non-metallic inclusion assessment using picturecharts.The method does not apply to particles of a length less than 3,0 µm or a width smaller than 2,0 µm. Definedby a product standard or agreement between the involved parties for certain special products, inclusions witha width below 2,0 µm can only be evaluated according to their length. Elongated inclusions with a lengthabove 1 410 µm are counted separately and are beyond the upper application limit of this standard. Globularinclusions with a diameter of 3,0 µm and above are included in the assessment.It is assumed, if particles are elongated or if there are stringers of particles, that they are parallel to eachother. Other arrangements are not covered by this standard. This European Standard applies to samples witha microscopic precipitation approaching random distribution.From the data of measurements obtained by this method, evaluation according to other standards can beestablished.This European Standard does not apply to free cutting steels.NOTE The basic principle of this European Standard allows the determination of non-metallic inclusion content byimage analysis techniques.