1.1 本规范涵盖了用于连接矿山、工业和标准铁路轨道中的钢轨的钢筋接头。 1.2 对于非热处理钢筋适用的应用，定义了三个等级的连接钢筋: 1.2.1 一级，低碳，主要用于工业和矿山。 1.2.2 2级，中碳，主要用于工业和矿山。 1.2.3 3级，高碳，一般用于标准铁路轨道。它们可用于生产绝缘轨道接头。 1.3 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。 1.4 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 covers steel joint bars for connecting steel rails in mine, industrial, and standard railroad track. 1.2 Three grades of joint bars are defined for applications where non-heat treated bars are suitable: 1.2.1 Grade 1, low-carbon, primarily for industrial and mine use. 1.2.2 Grade 2, medium-carbon, primarily for industrial and mine use. 1.2.3 Grade 3, high-carbon, for general use in standard railroad track. They may be used in the production of insulated track joints. 1.3 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. 1.4 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.