Z308 cast iron welding line with GB EZNi-1 rather AWS ENi-C1 
 Description: Z308 is a welding pure nickel core, strong reduction of the iron coating graphite electrode type, welding, the weld pieces from time to preheat, good crack resistance and processability. Nickel is expensive, should be satisfied in other rods can not be selected. AC and DC. 
 Uses: used thin pieces of cast iron welding and machining surfaces, such as engine blocks, machine guides, gear housing and other important gray cast iron. 
 Chemical Composition of Deposited Metal (%) Chemical Composition C Mn Si S Ni Fe total amount of other elements 
 Guaranteed value ≤ 2.00 ≤ 1.00 ≤ 2.50 ≤ 0.030 ≥ 90 ≤ 8 ≤ 1.00 
 Reference current (AC, DC +) electrode diameter (mm) φ2.5 φ3.2 φ4.0 φ5.0 
 Welding current (A) 50 ~ 100 70 ~ 120 110 ~ 180 160 ~ 190 
 Note: 
 1. Welding electrodes shall be subject to 150 ℃ or so before baking 1h. 
 2. Can hammer welding seam area to eliminate the stress and avoid cracking.