Material Group 22 WELDING TECHNOLOGY We are professionals in welding of steel, stainless steel, black- white-combinations and alumi- num compounds - certified accor- ding to DIN EN ISO 3834-2 and GL-tested. Material Group 22 Aluminum-magnesium alloys with Mg> 3.5%Scope: All combinations between material groups 22.1, 22.2, 22.3, 22.4)Material dimensions in the welding processes 131/141:Thickness: 3mm to 16mmPipe diameter> 500 mm, wall thickness up to 16 mmPlease note that project-specific extensions are possible at any time.