1.1 本规范规定了以下合金中铜合金UNS编号C72700、C72900和C72650的铜镍锡合金带材的要求: 铜合金UNS号。 标称成分重量 % 铜 镍 锡 C72700 85 9 6. C72900 77 15 8. C72650 87.5 7.5 5. 1.2 单位- 以英寸-磅为单位的数值应视为标准值。括号中给出的值是到国际单位制的数学转换，仅供参考，不被视为标准值。 1.3 以下安全危险警告仅适用于本规范中所述的试验方法。 1.3.1 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。 1.4 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。

1.1 This specification establishes requirements for copper-nickel-tin alloy strip for Copper Alloy UNS Nos. C72700, C72900, and C72650 in the following alloys: Copper Alloy UNS No. Nominal Composition Weight % Copper Nickel Tin C72700 85 9 6 C72900 77 15 8 C72650 87.5 7.5 5 1.2 Units— The 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 The following safety hazard caveat pertains only to the test method(s) described in this specification. 1.3.1 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. 1.4 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.