1.1 这些做法包括在制造商工厂装运之前或之后对各种铁合金和钢添加剂进行取样的程序。它们旨在给出代表每个批次的结果，这些结果将与制造商对同一批次的保证分析具有可比性。对于检查分析，买方可以使用任何所需的取样程序，但在此类样品上获得的分析结果不得作为合规或拒收的依据，除非所遵循的程序的精度与这些方法中规定的精度相当。 1.2 在对铁合金和钢添加剂进行取样时，由于取样器具中的铁污染样品，经常会出现严重的误差。因此，应采取特殊预防措施，以避免这一错误来源。 金属铁可以用磁铁从非磁性合金中去除；在其他合金中的估算需要特殊的分析程序( 附件A1 ). 为避免此错误，与样品接触的破碎机和粉碎设备的零件应为钢或其他具有高耐磨性的材料。 1.3 单位- 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 这些铁合金和钢添加剂取样规程旨在与用于证明符合成分规范的试验方法一起使用。假设所有使用这些方法的人都是经过培训的采样器，能够熟练、安全地执行常见的采样程序。

1.1 These practices include procedures for the sampling of the various ferroalloys and steel additives, either before or after shipment from the plants of the manufacturers. They are designed to give results representative of each lot that will be comparable with the manufacturer's guaranteed analysis for the same lot. For check analysis, the purchaser may use any sampling procedure desired, but the analytical results obtained on such samples shall not be a basis for compliance or rejection, unless the procedure followed is of an accuracy equivalent to that prescribed in these methods. 1.2 In sampling ferroalloys and steel additives, serious errors often occur from contamination of the samples by iron from the sampling appliances. Therefore, special precautions should be observed to avoid this source of error. Metallic iron may be removed with a magnet from nonmagnetic alloys; its estimation in other alloys requires special analytical procedures ( Annex A1 ). To avoid this error, parts of crushers and pulverizing equipment contacting the samples shall be of steel or other material showing a high resistance to abrasion of the type involved. 1.3 Units— The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 4.1 These practices for the sampling of ferroalloys and steel additives are intended for use with test methods used to demonstrate compliance with composition specifications. It is assumed that all who use these methods will be trained samplers capable of performing common sampling procedures skillfully and safely.