1.1 本规范涵盖用于管状结构和电杆或其他适当应用的高强度低合金钢板。60和65两个等级可根据需要进行轧制、正火或淬火和回火，以满足规定的机械要求。 1.2 在大多数环境中，这种钢的耐大气腐蚀性大大优于添加或不添加铜的碳素结构钢（见 注1 ). 当适当暴露在大气中时，这种钢可以裸（未涂漆）用于许多应用。 注1: 有关估算低合金钢耐大气腐蚀性的方法，请参阅指南 G101 . 1.3 在焊接钢材时，先决条件是使用适合钢材等级和预期用途或服务的焊接程序。见规范附录X3 A6/A6M 有关焊接性的信息。 1.4 符合规范的补充要求 A6/A6M 可用，但仅适用于买方在订购时指定的情况。 1.5 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 high-strength low-alloy steel plate intended for use in tubular structures and poles or in other suitable applications. Two grades, 60 and 65, may be provided as-rolled, normalized or quenched and tempered as required to meet the specified mechanical requirements. 1.2 The atmospheric corrosion resistance of this steel in most environments is substantially better than that of carbon structural steels with or without copper addition (see Note 1 ). When properly exposed to the atmosphere, this steel can be used bare (unpainted) for many applications. Note 1: For methods of estimating the atmospheric corrosion resistance of low-alloy steels, see Guide G101 . 1.3 When the steel is to be welded, it is presupposed that welding procedures suitable for the grade of steel and intended use or service will be utilized. See Appendix X3 of Specification A6/A6M for information on weldability. 1.4 Supplementary requirements in accordance with Specification A6/A6M are available, but shall apply only when specified by the purchaser at time of ordering. 1.5 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 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.