OK Tigrod 19.12 GTAW ERCu Description Bare copper wire for the GTA joining of oxygenfree, pure copper and low-alloyed copper. OK Tigrod 19.12 is alloyed with tin and has good flow properties. Preheating is recommended when welding large pieces. OK Tigrod 19.12 is normally welded with pure Ar as the shielding gas. Welding current DC(-) Classifications SFA/AWS A5.7 ERCu EN 14640 S Cu 1898 (CuSn1) Wire composition Si Mn Cu Sn 0.3 0.3 >98.0 0.8 Typical mech. properties all weld metal Yield stress, MPa 75 Tensile strength, MPa 220 Elongation, % 30 Charpy V Test temps, °C Impact values, J +20 75 -20 40
