📄摘要 (Abstract)
This specification covers the standard for heat-treated carbon manganese-silicon steel plates intended for fusion welded pressure vessels and structures. The steel shall be killed and undergo normalization, quenching and tempering. Heat and product analyses shall be performed on the materials and results shall conform to the required values in chemical composition in carbon, manganese, phosphorus, sulfur, silicon, copper, nickel, chromium and molybdenum. Mechanical testing like tension test shall be done on the plates and shall conform to the required tensile strength, yield strength, and elongation.
本规范涵盖了用于熔焊压力容器和结构的热处理碳-锰-硅钢板的标准。钢应为镇静钢，并经过正火、淬火和回火处理。应对材料进行熔炼分析和产品分析，其结果应符合对碳(C)、锰(Mn)、磷(P)、硫(S)、硅(Si)、铜(Cu)、镍(Ni)、铬(Cr)和钼(Mo)化学成分的要求值。应对钢板进行拉伸试验等力学性能测试，并应符合规定的抗拉强度、屈服强度和伸长率要求。
🔍范围 (Scope)
1.1 This specification covers heat-treated carbon-manganese-silicon steel plates intended for fusion welded pressure vessels and structures.
1.1 本规范适用于旨在用于熔焊压力容器和结构的热处理碳-锰-硅钢板。
1.2 Plates furnished under this specification are available in the following three classes:
1.2 按本规范提供的钢板有以下三个级别：
级别
Class |
热处理
Heat Treatment |
厚度
Thickness |
屈服强度, min
Yield Strength, min |
抗拉强度, min
Tensile Strength, min |
| 1 |
正火
Normalized |
2½ in. and under
[65 mm and under] |
50 [345] ksi [MPa] |
70 [485] ksi [MPa] |
Over 2½ in.
[Over 65 mm] |
45 [310] ksi [MPa] |
65 [450] ksi [MPa] |
| 2 |
淬火+回火
Quenched and Tempered |
2½ in. and under
[65 mm and under] |
60 [415] ksi [MPa] |
80 [550] ksi [MPa] |
Over 2½ to 4 in.
[Over 65 to 100 mm] |
55 [380] ksi [MPa] |
75 [515] ksi [MPa] |
Over 4 in.
[Over 100 mm] |
46 [315] ksi [MPa] |
70 [485] ksi [MPa] |
| 3 |
淬火+回火
Quenched and Tempered |
2½ in. and under
[65 mm and under] |
55 [380] ksi [MPa] |
80 [550] ksi [MPa] |
Over 2½ to 4 in.
[Over 65 to 100 mm] |
50 [345] ksi [MPa] |
75 [515] ksi [MPa] |
Over 4 in.
[Over 100 mm] |
40 [275] ksi [MPa] |
70 [485] ksi [MPa] |
注：1 ksi = 1,000 psi (磅力/平方英寸)
Note: 1 ksi = 1,000 psi (pound-force per square inch)
1.3 The maximum thickness of plates is limited only by the capacity of the material to meet the specified mechanical property requirements.
1.3 钢板的最大厚度仅受材料满足规定力学性能要求的能力限制。
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 is to be used independently of the other without combining values in any way.
1.4 以英寸-磅单位或SI单位表示的值应分别视为标准。在正文中，SI单位显示在括号中。每个系统中陈述的值不是精确的等价物；因此，每个系统应独立使用，而不以任何方式组合数值。
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.
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。