1.1 本规范涵盖线圈或切割长度的碳钢扁线。扁线被归类为冷轧截面，矩形，0.500英寸。宽度小于等于[12.7 mm]且小于0.250 in。厚度为[6.35 mm]。 1.2 低碳钢扁线由最大碳含量为0.25的钢成分制成 % 通过铸造或热分析。 1.3 碳弹簧钢扁线的碳含量范围为规定或要求的最大值超过0.25 % 通过铸造或热分析。 1.3.1 生产两种类型的碳弹簧钢扁线: 1.3.1.1 未回火的冷轧碳素弹簧钢扁线，具有多种理想的性能和性能组合 1.3.1.2 淬火和回火碳弹簧钢丝。 1.4 明确应用扁线是为特定应用开发的产品，只能通过尺寸和描述性名称指定。 1.5 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。每个系统中规定的值不一定是精确的等价物；因此，为确保符合本标准，每个系统应独立使用，且两个系统的值不得组合。 1.6 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 covers carbon steel flat wire in coils or cut lengths. Flat wire is classified as a cold-rolled section, rectangular in shape, 0.500 in. [12.7 mm] or less in width and under 0.250 in. [6.35 mm] in thickness. 1.2 Low-carbon steel flat wire is produced from steel compositions with a maximum carbon content of 0.25 % by cast or heat analysis. 1.3 Carbon spring steel flat wire is produced to a carbon range in which the specified or required maximum is over 0.25 % by cast or heat analysis. 1.3.1 Two types of carbon spring steel flat wire are produced: 1.3.1.1 Untempered cold-rolled carbon spring steel flat wire, produced to several desirable combinations of properties and 1.3.1.2 Hardened and tempered carbon spring steel wire. 1.4 Definite application flat wire is a product developed for a specific application and may be specified only by size and descriptive name. 1.5 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. 1.6 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.