1.1 本规范 2 涵盖低抗拉强度和中等抗拉强度的碳钢板，可根据生产商的选择进行镇静或半镇静。这些板用于熔焊压力容器。 1.2 本规范下的钢板有三种不同强度等级，如下所示: 等级 抗拉强度，ksi[MPa] A 45–65[310–450] B 50–70[345–485] C 55–75[380–515] 1.3 板的最大厚度受到组合物满足规定机械性能要求的能力的限制。 附注1: 仅对于镇静碳钢，请参考以下ASTM规范: 3 A299/A299M 锰硅碳钢压力容器板规范 A515/A515M 中间用碳钢压力容器板规范-和更高温度的服务 A516/A516M 中低温用碳钢压力容器板规范 1.4 对于由卷材生产且未进行热处理或仅进行应力消除的板材，规范的附加要求，包括附加试验要求和附加试验结果的报告 A20/A20M 申请。 1.5 以英寸-磅单位或国际单位制单位表示的值应单独视为标准值。在正文中，国际单位制单位显示在括号中。每个系统中陈述的值并不完全等同；因此，每个系统必须独立于另一个系统使用。合并两个系统的值可能导致不符合规范。 1.6 本国际标准是根据《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的由世界贸易组织技术性贸易壁垒（TBT）委员会发布。

1.1 This specification 2 covers carbon steel plates of low- and intermediate-tensile strengths which may be killed or semi-killed at the producer’s option. These plates are intended for fusion-welded 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 45–65 [310–450] B 50–70 [345–485] C 55–75 [380–515] 1.3 The maximum thickness of plates is limited by the capacity of the composition to meet the specified mechanical property requirements. Note 1: For killed carbon steels only, refer to the following ASTM specifications: 3 A299/A299M Specification for Pressure Vessel Plates, Carbon Steel, Manganese-Silicon A515/A515M Specification for Pressure Vessel Plates, Carbon Steel, for Intermediate- and Higher-Temperature Service A516/A516M Specification for Pressure Vessel Plates, Carbon Steel, for Moderate- and Lower-Temperature Service 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 A20/A20M apply. 1.5 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 the specification. 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.