ELGAMATIC 135 is a copper coated wire for use with the MIG/MAG process, which  deposits a 1.5% Ni / 0.3% Mo / 0.2% Cr weld metal. It is intended for welding the high tensile quenched and tempered steels such as Weldox 700, BSC RQT 701, N-A-XTRA 70 and USS T1. ELGAMATIC 135 can be welded with either an Ar/20% CO2 or CO2 gas shield, but the Ar mixture gives better fracture toughness at low temperature and higher strength levels.