Protective gas containing helium for multi-wire welding or soldering, including tandem welding, of metal, e.g. low-alloy or high-alloy steel or aluminum in vehicle, car, rail, machine or container construction

摘要

Protective gas, used for welding or soldering metals with several, especially 2, wire electrodes, contains helium (He). An Independent claim is also included for the welding or soldering processes using this gas.