Description: Z508 is a low-carbon steel core, strong graphite type coating iron welding, cold weld in the slow variable ash cast iron, cracking resistance is poor. AC-DC dual-use, low prices. 

 Uses: gray cast iron welding defects. 

 Chemical Composition of Deposited Metal (%) Chemical Composition C Mn Si SP Fe 
 To ensure that the value of 2.00 ~ 4.00 ≤ 0.75 2.50 ~ 6.50 ≤ 0.100 ≤ 0.150 margin 

 Reference current (AC, DC +) electrode diameter (mm) φ3.2 φ4.0 φ5.0 
 Welding current (A) 90 ~ 120 130 ~ 180 190 ~ 220 

 Note: 
 1. Welding electrodes shall be subject to 150 ℃ or so before baking 1h. 
 2. To withstand stress and shock for the casting and other important structures, not by the electrodes. 
 3. Small castings stiffness is not part of the defects can not preheat welding, and general welding parts to be preheated to 400 ℃, heat slow cooling after welding, the welding could be at the cutting. 

 Z238 iron electrode line with GB EZCQ 

 Description: Z238 is a low-carbon steel core, strong type of graphite electrode coating of ductile iron, because a certain amount of ductile agent, the deposited metal in the process of graphite in the cold spherical precipitates can be AC ??and DC . 

 Uses: welding ductile iron. 

 Chemical Composition of Deposited Metal (%) Chemical Composition C Mn Si SP Fe nodulizer other elements of the total 
 To ensure that the value of 3.20 ~ 4.20 ≤ 0.80 3.20 ~ 4.00 ≤ 0.100 ≤ 0.150 ≤ 0.100 0.04 ~ 0.15 margin 

 Welding current (A) 80 ~ 120 130 ~ 170 160 ~ 190