1.1 本规范 2. 覆盖钼合金钢板，特别适用于焊接锅炉和其他压力容器。 1.2 本规范下的钢板有三个等级，具有不同的强度等级，如下所示: 等级 抗拉强度，ksi[MPa] A. 65–85 [450–585] B 70–90 [485–620] C 75–95 [515–655] 1.3 板材的最大厚度仅受满足规定机械性能要求的成分能力的限制。 1.4 以英寸-磅单位或国际单位表示的数值应单独视为标准值。在文本中，SI单位显示在括号中。每个系统中所述的值并不完全相等；因此，每个系统必须独立于其他系统使用。组合两个系统的值可能会导致不符合本规范。 1.5 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 2 covers molybdenum-alloy steel plates, intended particularly for welded boilers and other pressure vessels. 1.2 Plates under this specification are available in three grades having different strength levels as follows: Grade Tensile Strength, ksi [MPa] A 65–85 [450–585] B 70–90 [485–620] C 75–95 [515–655] 1.3 The maximum thickness of plates is limited only by the capacity of the composition to meet the specified mechanical property requirements. 1.4 The values stated in either inch-pound units or SI units are to be regarded separately 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. 1.5 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.