1.1 本规范 2. 涵盖了适用于规范的锻铜和铜合金棒材、型材和锻件的通用要求 B16/B16M ， B21/B21M ， B98/B98M ， B124/B124M ， B138/B138M ， B139/B139M ， B140/B140M ， B150/B150M ， B151/B151M ， 1987年1月/187米 ， 1996年B196M ， 283/b2.83亿 ， B301/B301M ， B371/B371M ， B411/B411M ， B441 ， B453/B453M ， B455 ， B570 ， B870 ， B927/B927米 ， B929 ， B967/B967米 ， B974/B974M 和 B981/B981M 在其中引用的范围内。 1.2 产品规范中规定了本规范中未包含的化学成分、物理和机械性能以及所有其他要求。 1.3 单位-- 以国际单位制或英寸磅单位表示的数值应单独视为标准。 每个系统中规定的值不一定是完全相等的；因此，为了确保符合标准，每个系统应独立使用，并且两个系统的值不得组合。 1.3.1 在文本中，SI值用括号表示。 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）。本标准的使用者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====== 12.1 为了确定是否符合下表中列出的特性要求和尺寸公差的规定限值，应根据实践中的舍入方法对观测值或计算值进行舍入 E29 。 所有物 观察或的舍入单位 计算值 化学成分 硬度 最后一个右边最近的单位 电阻率 用于表示 电导率 极限值 抗拉强度 最接近ksi[5 MPa] 屈服强度 伸长率: 最接近的1 % 粒度: 0.060 mm以下 0.005毫米的最近倍数 0.060 mm及以上 最接近0.01毫米

1.1 This specification 2 covers the general requirements common to wrought copper and copper alloy rod, bar, shapes, and forgings which shall apply to Specifications B16/B16M , B21/B21M , B98/B98M , B124/B124M , B138/B138M , B139/B139M , B140/B140M , B150/B150M , B151/B151M , B187/B187M , B196/B196M , B283/B283M , B301/B301M , B371/B371M , B411/B411M , B441 , B453/B453M , B455 , B570 , B870 , B927/B927M , B929 , B967/B967M , B974/B974M , and B981/B981M to the extent referenced therein. 1.2 The chemical composition, physical and mechanical properties, and all other requirements not included in this specification are prescribed in the product specification. 1.3 Units— The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.3.1 Within the text the SI values are given in brackets. 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 ====== 12.1 For the purpose of determining compliance with the specified limits for requirements of the properties listed in the following table and for dimensional tolerances, an observed value or a 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 Hardness nearest unit in the last right-hand Electrical resistivity significant digit used in expressing the Electrical conductivity limiting value Tensile strength nearest ksi [5 MPa] Yield strength Elongation: nearest 1 % Grain size: Under 0.060 mm nearest multiple of 0.005 mm 0.060 mm and over nearest 0.01 mm