Z117 high-vanadium cast iron electrode model GB / T: EZV 
 Description: low carbon steel core, high-vanadium cast iron with low hydrogen electrode, the weld to form a ferrite matrix and the dispersed vanadium carbide steel organization, has good crack resistance, the use of DCRP. Use: Cast Iron welding defects, such as automotive cylinder, rack gear box, also welding of high strength cast iron and ductile iron castings, welding parts may be preheated, can be machined after welding, but the processing inferior to Z508, Z308, Z408 and good machinability. Welding parts large or complex shape of the workpiece to be heated to 150 ~ 450 ℃. 
 Chemical Composition of Deposited Metal /% C ≤ 0.25 Si ≤ 0.7 Mn ≤ 1.5 Fe I V 8-13