1.1 本规范涵盖用于焊接、铆接或螺栓结构的激光束或激光混合焊接、组合、碳钢、锐角型材（SCP）方形、矩形或定制形状结构管。本规范不包括耐候钢，因为大多数不能通过这些方法焊接。SCP管道用于但不限于以下应用:建筑和结构，包括建筑暴露钢结构（AESS）；建筑钢型材，如幕墙、楼梯等； 工业的以及一般结构应用。 注1: 没有其他尖角激光或激光混合焊接碳钢结构形状的标准，但附录X1提供了其规范指南。 1.2 根据本规范生产的SCP结构管段的周长为2845 mm[112 in.]或更小，壁厚为4.76至38.1 mm[3/16至1.50 in.]。特定SCP管形状内的壁厚度可以不同。 1.3 本规范规定了制造- 上、SCP激光和激光混合焊接碳钢管截面，要求焊缝至少与母材的抗拉强度和屈服强度相匹配。 注2: 本规范所涵盖的产品在专用生产线上以小批量生产。根据AWS、ISO或CSA要求，通过制造设施的焊接工艺评定确保产品质量要求。除标准焊缝检验和焊缝质量要求外，买方可规定更高级别的焊缝检验； 补充S1拉伸、S2弯曲和S3夏比V形缺口批次试验；以及其他要求。 注3: 由于最终用途的不同要求，可规定四种不同的长度公差和焊缝检查水平。 1.4 本规范使用规范 36米/36米 , A572/A572米 指定强度等级的化学和机械要求参见EN 10025-2或EN 10025-3。 1.5 本规范文本包含注释和脚注，提供了解释性材料。 这些注释和脚注（不包括表和图中的注释和脚注）不包含任何强制性要求。 1.6 单位- 本规范以英寸磅单位和国际单位制表示；但是，除非采购订单或合同规定了适用的M规格名称（SI单位），否则应采用英寸磅单位。以英寸磅单位或国际单位制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。每个系统中规定的值可能不完全相等； 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。 1.7 本标准并不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建立适当的安全、健康和环境实践，并确定监管限制的适用性。 1.8 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers laser beam or laser hybrid welded, built-up, carbon steel, sharp-cornered profiles (SCP) square, rectangular, or custom shape structural tubing for welded, riveted, or bolted construction. This specification does not include weathering steels, since most cannot be welded by these methods. SCP tubing is used in, but not limited to, the following applications: buildings and structures, including architecturally exposed steel structures (AESS); architectural steel profiles such as curtain wall, staircases, and others; industrial; and general structural applications. Note 1: There is no standard for other sharp-cornered laser or laser hybrid welded carbon steel structural shapes, but Appendix X1 provides guidance on their specification. 1.2 The SCP structural tubing sections produced to this specification have a perimeter of 2845 mm [112 in.] or less and wall thickness of between 4.76 and 38.1 mm [3/16 and 1.50 in.]. The thicknesses of walls within a specified SCP tube shape can be different. 1.3 This specification establishes the minimum requirements for manufacturing of built-up, SCP laser, and laser hybrid welded carbon steel tube sections and requires the welds to, at a minimum, match the tensile and yield strength of the base metal. Note 2: Product covered by this specification is manufactured in small lots on dedicated production lines. Product quality requirements are ensured through welding procedure qualification of the manufacturing facility in accordance with AWS, ISO, or CSA requirements. In addition to the standard weld inspection and weld quality requirements, the purchaser can specify higher levels of weld inspection; Supplementary S1 tensile, S2 bend, and S3 Charpy V- notch lot testing; and other requirements. Note 3: Because of the varying requirements of the end-use applications, four different length tolerance and weld inspection levels may be specified. 1.4 This specification uses Specifications A36/A36M , A572/A572M , EN 10025-2, or EN 10025-3 for the chemical and mechanical requirements of the designated strength grade. 1.5 The text of this specification contains notes and footnotes that provide explanatory material. Such notes and footnotes, excluding those in tables and figures, do not contain any mandatory requirements. 1.6 Units— This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract specifies the applicable M specification designation (SI units), the inch-pound units shall apply. 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 may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in nonconformance with the standard. 1.7 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. 1.8 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.