T307 copper-nickel alloy electrode 
 Description: T302 Cu70Ni30 titanium calcium type of copper-nickel alloy electrode can be AC-DC dual-use, all-position welding. Good welding process, weld metal with good ductility and crack resistance. 
 Uses: mainly used for welding 70-30 copper-nickel alloy. Also be used for surfacing of steel components 
 Chemical composition of deposited metal it /% 
 Mn Fe Si Ni P Pb Ti other Cu 
 1.0-2.5 0.4-0.75 ≤ 0.5 29-33 ≤ 0.02 ≤ 0.02 ≤ 0.50 ≤ 0.5 margin