Meet OK Tigrod 55 (formerly OK Tigrod 13.13), a copper-coated, low alloyed, chromium-nickel-molybdenum (0,5% Cr, 0,5% Ni, 0,2% Mo) rod that's not just for GTAW of high-strength steels with a minimum tensile strength of 690 MPa. It's also your go-to for welding steels that require good impact strength at low temperatures.