1.1 本规范涵盖螺栓或焊接结构应用中使用的激光和激光混合焊接不锈钢棒、板、尖角型材（SCP）和结构质量的组合形状。SCP和建成形状用于但不限于以下应用:工业和一般结构应用，如建筑，包括建筑外露钢结构（AESS）；建筑钢型材，如幕墙和楼梯。 注1: 术语激光熔接也用于描述激光焊接。 1.1.1 提供了可选性质的补充要求。只有在买方指定的情况下才适用。 注2: 由于本规范所涵盖的产品是在专用生产线上小批量生产的，因此根据AWS、ASME或ISO的要求，通过要求每个制造厂的焊接工艺规范和操作员资格来确保最低产品质量要求。如果需要，买方可以指定更高级别的焊接检查；机械和腐蚀试验的补充要求；以及其他要求。 注3: 由于最终用途应用的要求不同，可能会规定不同的长度公差和焊接检查级别。 1.2 本规范中涵盖的形状包括规范第3.1.2条中定义的形状 A6/A6M ，方形和矩形空心截面，以及由两种或多种形状、板、条、片或条制成的其他形状，包括定制形状。 1.3 本规范规定了制造激光和激光混合焊接不锈钢型材的最低要求，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 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。 1.6 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。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。 1.7 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。 1.8 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 and laser hybrid welded stainless steel bars, plates, sharp-cornered profile (SCP), and built-up shapes of structural quality for use in bolted or welded structural applications. SCP and built-up shapes are used in, but not limited to, the following applications: industrial and general structural applications like buildings, including architecturally exposed steel structures (AESS); architectural steel profiles, such as curtain wall and staircases. Note 1: The term laser fusion is also used to describe laser welding. 1.1.1 Supplementary requirements of an optional nature are provided. They shall apply only when specified by the purchaser. Note 2: Since the product covered by this specification is manufactured in small lots on dedicated production lines, minimum product quality requirements are ensured by requiring welding process specification and operator qualification at each manufacturing facility in accordance with AWS, ASME, or ISO requirements. If required, the purchaser can specify higher levels of weld inspection; supplementary requirements for mechanical and corrosion testing; and other requirements. Note 3: Because of the varying requirements of the end-use applications, different length tolerance and weld inspection levels may be specified. 1.2 Shapes covered in this specification include those defined in Article 3.1.2 of Specification A6/A6M , square and rectangular hollow sections, and additional shapes, including customized, that are made from two or more shapes, plates, bar, sheet, or strip. 1.3 This specification establishes the minimum requirements for manufacturing of laser and laser hybrid welded stainless steel shapes 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 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.