1.1 本规范涵盖用于焊接、铆接或螺栓连接结构的激光或激光混合焊接不锈钢方形、矩形或定制形状的结构管。该管要么具有尖角轮廓（SCP），要么是具有圆角的组合管。本产品用于但不限于以下应用:建筑和结构，包括建筑外露钢结构（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: 术语激光熔接也用于描述激光焊接。 1.2 该卡套管由多块板、条、片、带或形状制成，可能具有不同的厚度，根据规范要求通过激光或激光混合焊接制成 1069/1069米 。它的外形尺寸最大可达36英寸（914毫米），壁厚公差为规定壁厚的±5%。 角焊缝是允许的。 1.3 本规范规定了制造激光和激光混合焊接不锈钢管的最低要求，并要求焊缝至少与母材的抗拉强度和屈服强度相匹配。如果使用不同强度的母材，则应匹配强度较低的母材。 1.4 本规范是指规范 240米/240米 ， 276/A276M 或 A479/A479米 化学要求，但机械试验要求由本标准的机械性能部分确定。本标准包括四个强度等级。默认强度等级1由基本金属标准确定。2级至4级适用于更高强度等级的规范。 1.5 提供了可选性质的补充要求（S1夏比V型缺口、S2腐蚀、S3拉伸和S4弯曲）。只有在买方指定的情况下才适用。 注2: 由于末端的不同要求- 可以规定使用应用、不同的长度公差、焊接检查水平、强度水平和其他要求。 注3: 本规范所涵盖的产品是在专用生产线上小批量生产的。根据规范，通过每个制造设施的焊接程序和操作员资格来确保产品质量要求 1069/1069米 .原产国和基底金属炉号由产品测试报告上的壁厚确定。 1.6 本规范的文本包含提供解释性材料的注释和脚注。除表和图中的注释和脚注外，这些注释和脚注不包含任何强制性要求。 1.7 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。在正文中，国际单位制显示在括号中。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。将两个系统的值结合起来可能会导致不符合标准。 1.8 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。 1.9 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 laser or laser-hybrid welded stainless steel square, rectangular, or custom shape structural tubing for welded, riveted, or bolted construction. This tube has either a sharp-cornered profile (SCP) or is built-up tube with rounded corners. This product 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: The term laser fusion is also used to describe laser welding. 1.2 This tubing is manufactured from multiple pieces of plate, bar, sheet, strip, or shapes, potentially in different thicknesses by laser or laser-hybrid welding in accordance with the requirements of Specification A1069/A1069M . It is available in sizes up to 36 in. (914 mm) outside dimension, and the wall thickness tolerance is ±5 % of the specified wall thickness. Corner welds are permissible. 1.3 This specification establishes the minimum requirements for manufacturing of laser and laser hybrid welded stainless steel tube and requires the welds to, at a minimum, match the tensile and yield strength of the base metal. If base metals of different strengths are used, the lower strength base metal shall be matched. 1.4 This specification refers to Specifications A240/A240M , A276/A276M or A479/A479M for chemical requirements, but the mechanical test requirements are determined by the mechanical properties section of this standard. This standard includes four strength grades. The default strength grade 1 is determined by the base metal standard. Grades 2 through 4 are for specification of higher strength levels. 1.5 Supplementary requirements (S1 Charpy V- notch, S2 Corrosion, S3 Tensile, and S4 Bend) of an optional nature are provided. They shall apply only when specified by the purchaser. Note 2: Because of the varying requirements of the end-use applications, different length tolerance, weld inspection levels, strength levels and other requirements may be specified. Note 3: Product covered by this specification is manufactured in small lots on dedicated production lines. Product quality requirements are ensured through welding procedure and operator qualification at each manufacturing facility in accordance with Specification A1069/A1069M . The country of origin and base metal heat numbers are identified by wall thickness on the product test report. 1.6 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. 1.7 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. 1.8 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. 1.9 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.