1.1本规范涵盖了矿山、工业和标准铁路轨道中连接钢轨的钢接头钢筋。 1.2对于适用于非热处理钢筋的应用，定义了三个等级的连接钢筋: 1.2.1 1级，低碳，主要用于工业和矿山。 1.2.2二级，中碳，主要用于工业和矿山。 1.2.3 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。 括号中给出的值仅供参考。

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 the standard. The values given in parentheses are for information only.