T307 copper-nickel electrode "consistent: GB ECuNi-B 

 Description: CHCu307 is a low hydrogen type electrode Cu70Ni30 copper and nickel. Using DCRP. The electrode arc stability, weld well. 
 Uses: mainly used for welding 70-30 or 70-30 copper-nickel alloy of copper-nickel alloy / 645-III steel composite metal and 70-30 copper-nickel alloy coatings do ,645-III lining of steel structures do meet the basic metal. 

 Chemical composition of deposited metal: (%) 
 Cu Si Mn Fe Ti Ni PS Pb Pb + Zn 
 Margin ≤ 0.5 ≤ 2.5 ≤ 2.5 ≤ 0.5 29.0-33.0 ≤ 0.020 ≤ 0.015 ≤ 0.02 ≤ 0.5 

 Mechanical properties of deposited metal: 
 Tensile strength of 6b (MPa) Elongation § 5 (%) cold corner 
 ≥ 350 ≥ 20 180 ° 

 Reference Current: (DC +) 

 Electrode diameter (mm) 3.2 4.0 5.0 
 Welding current (A) 95-120 120-150 150-180 

 Note: 1: 300 degrees before welding electrodes shall be baked 1 hour. 
 2: The surface of the water before welding welding, oil, oxides and other impurities must be removed. 
 3; if preheating before welding, interpass temperature should be lower than 150 degrees, the use of that short arc welding. 
 The company operating the copper alloys, Cu70Ni30 welding, quality assurance, welcome to consult the discussion.