1.1 本规范涵盖通过电阻锻造焊接工艺从线圈制造的结构质量的碳素和高强度钢型材。 1.2 所涵盖的尺寸范围在柱、梁和三通的标称尺寸中进行了说明。 尺寸范围，英寸（mm） 腹板厚度 0.060至0.500[1.5至12.7] 法兰厚度 0.060至0.500[1.5至12.7] 总深度 2.00至24.00[50至600] 法兰宽度 0.50至12.00[12.7至300] 1.3 这些形状适用于两类应用: 1.3.1 1级- 静态荷载占主导地位的一般结构用途。 1.3.2 第2类- 发生疲劳载荷的结构用途，是主要设计考虑因素。 注1: 小心 -由于腹板和法兰连接处没有光滑、完整、大半径的圆角（请参见 图1 )，电阻锻造焊接型材在扭转、横向载荷和弯曲条件下的疲劳极限通常低于热态- 类似尺寸和材料的轧制形状。在动态载荷是主要设计考虑因素的情况下，用户应咨询形状制造商，了解每种特定用途、材料和尺寸的疲劳极限推荐值。 图1 外观剥离试验标准 1.4 当要焊接钢材时，假设将使用适合钢材等级和预期用途或服务的焊接程序。参见规范附录X3 A6/A6M 有关焊接性的信息。 1.5 以国际单位制或英寸磅单位表示的数值应单独视为标准。每个系统中规定的值可能不是完全相等的；因此，每个系统应独立使用。将两个系统的值合并可能导致不符合标准。 1.6 以下安全隐患警告仅适用于第节测试方法部分 10 ，本规范的: 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.7 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 covers carbon and high-strength steel shapes of structural quality manufactured by the electric-resistance forge-welding process from coils. 1.2 The size range covered is described in nominal dimensions for columns, beams, and tees. Size Range, in. (mm) Web thickness 0.060 to 0.500 [1.5 to 12.7] Flange thickness 0.060 to 0.500 [1.5 to 12.7] Overall depth 2.00 to 24.00 [50 to 600] Flange width 0.50 to 12.00 [12.7 to 300] 1.3 These shapes are intended for two classes of application: 1.3.1 Class 1— General structural use where static loading predominates. 1.3.2 Class 2— Structural use where fatigue loading occurs and is a principal design consideration. Note 1: Caution —Because of the absence of smooth, integral, large radius fillets at the junctions of the webs and the flanges (see Fig. 1 ), fatigue limits of resistance forge-welded shapes in torsion, lateral loading, and flexure are usually lower than those for hot-rolled shapes of similar size and material. Users should consult shape manufacturers for recommended values of fatigue limits for each specific use, material, and size in cases where dynamic loading is a principal design consideration. FIG. 1 Appearance of Peel Test Criteria 1.4 When the steel is to be welded, it is presupposed that a welding procedure 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. 1.5 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.6 The following safety hazards caveat pertains only to the test methods portion, Section 10 , of this specification: This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 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.