Z411-type iron (electric) gas welding rod: iron cored electrodes, weld into a cold in the relief of gray cast iron, but the anti-crack performance is poor. The electrode prices 

 Low. Slow variable ashes cold weld cast iron. For the welding of gray cast iron deficiency. 
 Uses: gray cast iron parts repair defects. Welding can be AC ??and DC welding machine full of gray iron and ductile iron welding, and other 

 Ferrous metals and alloys, 

 Chemical Composition of Deposited Metal (%) 
 C 2.00-4.00 
 Mn ≤ 0.75 
 Si 2.50-6.50 
 S ≤ 0.10 
 P ≤ 0.15 
 Fe I 

 Reference current: (AC or DC +) 
 Electrode diameter (MM) 4.0 
 Welding current (A) 120-200 
 After welding, relatively hard, wear resistance, and difficult to process.