BS EN 10247:2017定义了微观非金属内源性夹杂物的方法 使用图片图表进行评估。该方法不适用于长度或直径小于3,0µm或宽度小于 2.0µm。如果产品标准或相关方就某些特殊情况达成的协议规定 宽度低于2.0µm的产品、夹杂物可单独通过长度进行评估。夹杂 超过表2中上限的尺寸被评估为属于最大等级和 单独注明其真实尺寸（见8。 5.6).假设粒子被拉长，或者粒子有细条，它们彼此平行 另外本标准草案不包括其他安排。本欧洲标准草案适用 对于具有接近随机分布的微观降水的样品。根据该方法获得的测量数据，可以根据其他标准进行评估 建立。本欧洲标准草案不适用于易切削钢。注:本欧洲标准草案的基本原则允许确定- 金属夹杂物 内容通过图像分析技术。交叉引用:EN ISO/IEC 17025（ISO/IEC 17025:2005）ASISO/IEC 17025:2005ISO 9042:1988ASTM E45-13DIN 50602:1985（E）ISO 4967:1998NF A 04-106SS 11111 6购买本文件时可提供的所有现行修订件均包含在购买本文件中。

BS EN 10247:2017 defines a method of microscopic non-metallic endogenous inclusion assessment using picture charts.The method does not apply to particles of a length or diameter less than 3,0 µm or a width smaller than 2,0 µm. If defined by a product standard or agreement between the involved parties for certain special products, inclusions with a width below 2,0 µm can be evaluated by length alone. Inclusions with dimensions exceeding the upper limits in Table 2 are evaluated as belonging to the maximum class and noted separately with their true dimensions (see 8.5.6).It is assumed, if particles are elongated or if there are stringers of particles, that they are parallel to each other. Other arrangements are not covered by this draft standard. This draft European Standard applies to samples with a microscopic precipitation approaching random distribution.From the data of measurements obtained by this method, evaluation according to other standards can be established.This draft European Standard does not apply to free cutting steels.NOTE The basic principle of this draft European Standard allows the determination of non-metallic inclusion content by image analysis techniques.Cross References:EN ISO/IEC 17025 (ISO/IEC 17025:2005) ASISO/IEC 17025:2005ISO 9042:1988ASTM E45 - 13DIN 50602:1985 (E)ISO 4967:1998NF A 04-106SS 111116All current amendments available at time of purchase are included with the purchase of this document.