Laser Cold Welding Machine Stainless Steel Mould Repair Welder 3800W 220V. 220V Super Laser Cold Welding Machine Stainless Steel Mould Repair Welder 3800W. SDHB-3 Multifunctional Super Laser Cold Welding Machine are widely used in thin plate welding, mainly in stainless steel welding, countertop welding, sink welding, cabinet welding and other places. Welding wire range: f 0.4-3mm.