1.1本规范涵盖两种类型和四个强度等级的高强度低合金热轧结构钢板，用于卡车框架、支架、起重机吊杆、轨道车和类似应用。符合本规范的钢具有更好的成形性。这些钢材通常在轧制状态下提供。提供的类型和强度等级由制造商和买方商定。类型和强度等级如表所示。 1.2板的最大厚度应如下所示: 等级 最大板厚 在里面[毫米] 50 2 [50] 60 1 1/2[40] 70 1 [25] 80 3/4[20] 1.3以英寸-磅单位或国际单位制表示的数值应视为标准值。在文本中，国际单位显示在括号中。每个系统中规定的值不是精确的等价物；因此，每个系统必须相互独立使用。合并两个系统的值可能会导致不符合本规范。有关焊接性的信息，请参阅规范A 6/A 6M的附录X3。 1.4对于由线圈生产且未经热处理或仅进行应力消除的板材，规范A 6/A 6M的附加要求，包括附加测试要求和附加测试结果报告适用。

1.1 This specification covers two types and four strength grades of high-strength low-alloy, hot rolled structural steel plate for use in truck frames, brackets, crane booms, rail cars, and similar applications. Steels that conform to this specification offer improved formability. These steels are normally furnished in the as-rolled condition. The type and strength grade furnished is as agreed upon between the manufacturer and the purchaser. The types and strength grades are shown in the tables. 1.2 The maximum thickness of plates shall be as follows: Grade Plate Thickness, max in. [mm] 50 2 [50] 60 1 1/2[40] 70 1 [25] 80 3/4[20] 1.3 The values stated in either inch-pound units or SI units are to be regarded as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this specification. See Appendix X3 of Specification A 6/A 6M for information on weldability. 1.4 For plates produced from coil and furnished without heat treatment or with stress relieving only, the additional requirements, including additional testing requirements and the reporting of additional test results, of Specification A 6/A 6M apply.