1.1 本规范涵盖了用作铸造和锻造合金添加剂的锭、丸和华夫饼形式的铜镍、铁铜、磷铜和硅铜中间合金的要求。 1.2 单位-- 以英寸-磅单位表示的值应被视为标准值。括号中给出的值是对国际单位制的数学转换，仅供参考，不被视为标准值。 1.3 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 =====意义和用途====== 11.1 为了确定是否符合化学成分的规定限值，应按照实施规程的四舍五入方法对观察值或计算值进行四舍五舍五入 E29 . 房地产 观测值或计算值的四舍五入单位 化学成分 右最后一位有效数字中的最近单位 用于表示极限值

1.1 This specification covers the requirements for copper nickel, ferro copper, phosphor copper, and silicon copper master alloys in ingot, shot, and waffle form to be used as addition agents for cast and wrought alloys. 1.2 Units— Values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 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 ====== 11.1 For purposes of determining compliance with the specified limits for chemical composition, an observed or calculated value shall be rounded as indicated in accordance with the Rounding method of Practice E29 . Property Rounded Unit for Observed or Calculated Value Chemical Composition Nearest unit in the last right-hand significant digit used in expressing the limiting value