1.1 本规范确立了几种锻造产品规范的通用要求。除非采购订单或单独规范中另有规定，否则这些一般要求应适用于根据ASTM发布的以下产品规范供应的铜和铜合金板、薄板、带材和轧制棒材: B36/B36M , B96/B96M , B103/B103M , B121/B121M , B122/B122M , B130型 , B152/B152M , B169/B169M , B422/B422M , B534 , B694 , B888/B888M 和 B936 . 2. 1.2 单位- 本规范是英寸的配套规范- 磅规格 B248页 . 1.3 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====== 11.1 为了确定是否符合下表所列特性要求和尺寸公差的规定限值，应按照实践中的舍入方法对观察值或计算值进行舍入 E29年 : 所有物 观察到的或 计算值 化学成分 最近的单位 硬度 右侧有效数字 电阻率 用于表达 电导率 极限值 抗拉强度 最接近5 MPa 屈服强度 最接近5 MPa 伸长率: 最近的1 % 粒度: 0.060毫米以下 0.005 mm的最近倍数 0.060 mm及以上 最接近0.01毫米

1.1 This specification establishes the general requirements common to several wrought product specifications. Unless otherwise specified in the purchase order or in an individual specification, these general requirements shall apply to copper and copper-alloy plate, sheet, strip, and rolled bar supplied under each of the following product specifications issued by ASTM: B36/B36M , B96/B96M , B103/B103M , B121/B121M , B122/B122M , B130 , B152/B152M , B169/B169M , B422/B422M , B534 , B694 , B888/B888M , and B936 . 2 1.2 Units— This specification is the companion specification to inch-pound Specification B248 . 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 the purposes 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 nearest unit in the last Hardness right-hand significant digit Electrical resistivity used in expressing Electrical conductivity the limiting value Tensile strength nearest 5 MPa Yield strength nearest 5 MPa Elongation: nearest 1 % Grain size: Under 0.060 mm nearest multiple of 0.005 mm 0.060 mm and over nearest 0.01 mm