1.1 本规范 2. 涵盖了用于涉及熔焊或钎焊的压力容器的热轧碳钢板。焊接和钎焊技术至关重要，应符合商业惯例。 1.2 本规范包括以下等级: 机械要求 最小屈服强度 最小抗拉强度 等级 ksi MPa ksi MPa A. 25 170 45 310 B 30 205 50 345 C 33 230 55 380 D 35 240 60 415 E 38 260 65 450 F 42 290 70 485 G 45 310 75 515 H 45 310 75 515 1.3 热轧碳钢板通常以切割长度和十进制厚度提供。可以提供卷材，前提是按照第节中的机械性能要求，取张力试样来代表板坯的前端、中间和后端 6.1 ，用于抗拉强度。买方应认识到，这可能需要切割线圈以获得一半的测试样品和结果- 尺寸线圈。板材应符合以下尺寸限制: 宽度，英寸[mm] 厚度，英寸[mm] 12岁以上[300岁以上] 0.270至0.230[7.0至6.0] 板材（仅卷材） 低于0.230至0.057[6.0至1.5] 床单 1.4 以英寸-磅单位或国际单位表示的值应单独视为标准值。在文本中，国际单位制显示在括号中。每个系统中所述的值不是完全等效的；因此，每个系统都应独立使用。结合两个系统的值可能会导致不符合规范。 1.5 公差见一般要求规范 568/568m 和 A635/A635米 。根据订购产品的厚度和宽度，适用适当的一般要求规范。 1.6 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。

1.1 This specification 2 covers hot-rolled carbon steel sheet for pressure vessels involving fusion welding or brazing. Welding and brazing technique is of fundamental importance and shall be in accordance with commercial practices. 1.2 The following grades are included in this specification: Mechanical Requirements Yield Strength, min Tensile Strength, min Grade ksi MPa ksi MPa A 25 170 45 310 B 30 205 50 345 C 33 230 55 380 D 35 240 60 415 E 38 260 65 450 F 42 290 70 485 G 45 310 75 515 H 45 310 75 515 1.3 Hot-rolled carbon steel sheet is generally furnished in cut lengths and to decimal thickness only. Coils may be furnished, provided tension test specimens are taken to represent the front end, middle, and back end of the slab as required by the mechanical property requirements in section 6.1 , for Tensile Strength. The purchaser should recognize this may require cutting the coils to obtain test samples and results in half-size coils. The sheet shall be furnished to the following size limits: Width, in. [mm] Thickness, in. [mm] Over 12 [Over 300] 0.270 to 0.230 [7.0 to 6.0] sheet (coils only) Under 0.230 to 0.057 [6.0 to 1.5] sheet 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 shall be used independently of the other. Combining values from the two systems may result in nonconformance with the specification. 1.5 Tolerances are found in General Requirements Specifications A568/A568M and A635/A635M . The appropriate General Requirements specification is applied based on the thickness and width of the product ordered. 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.