ASTM A1127/A1127M-23
不锈钢激光和激光混合焊接、锐角型材(SCP)或组合圆角方形、矩形和特殊形状结构管的标准规范
Standard Specification for Stainless Steel Laser and Laser-Hybrid Welded, Sharp-Cornered Profile (SCP) or Built-Up Rounded Corner Square, Rectangular, and Special Shape Structural Tube