1.1 本规范涵盖热轧和冷轧合金及结构合金钢板和钢带。合金钢按化学成分要求提供，主要用于要求弯曲和适度成型的一般或其他用途。结构合金钢应符合化学成分要求和特定机械性能要求，其中可能包括拉伸试验、硬度试验或其他公认的机械试验。 1.2 如果要求材料具有更高的内部坚固性均匀性和表面无缺陷，则应参考规范 A507型 . 1.3 合金和结构合金钢板和钢带的生产不符合内部清洁度要求。 通常情况下，表面缺陷并不令人反感，良好的光洁度不是首要要求。 1.4 结构合金钢的成形性随屈服强度或硬度的增加而降低。因此，必须考虑与所用等级机械性能相关的产品设计。 1.5 本规范涵盖的材料可以在几种条件下提供:热处理、表面条件和边缘，如本文所述，成卷或切割长度。 1.6 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。 1.7 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 hot-rolled and cold-rolled alloy and structural alloy-steel sheet and strip. Alloy steel is furnished to chemical composition requirements and is intended primarily for general or miscellaneous use where bending and moderate forming is a requirement. Structural alloy steel is furnished to chemical composition requirements and to specific mechanical property requirements which may include tension tests, hardness tests, or other commonly accepted mechanical tests. 1.2 If material of a higher degree of uniformity of internal soundness and freedom from surface imperfections is required, reference should be made to Specification A507 . 1.3 Alloy and structural alloy-steel sheet and strip are not produced to internal cleanliness requirements. Normally surface imperfections are not objectionable, and a good finish is not a prime requirement. 1.4 The formability of structural alloy steel decreases with increasing yield strength or hardness. Therefore, product design in relation to the mechanical properties of the grade used must be considered. 1.5 The material covered by this specification may be furnished in several conditions: heat treatments, surface conditions, and edges, as specified herein, in coils or cut lengths. 1.6 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. 1.7 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.