AWS Cast iron welding rod Z308

Z308                    Conformance GB/T10044 EZNi-1             AW A5.15 ENi-Cl
 
 
Introduction:  Z308 is a kind of cast iron electrode with pure nickel core wire and strong reducibility graphite type coating. When welding, the preheating of the weldments can be left out. It has excellent crack-resistance and machinability. Due to the expensive nickel, it can only be used when other kinds of electrodes are not suitable. AC/DC.
 
 
Application: Used for repair welding on thin cast iron pieces and machined surfaces, such as some key gray cast iron pieces like engine bearers, guide rails of machine tools, pinion stands, etc. 
 
Chemical Composition of Deposited Metal (%) Chemical Composition C Mn Si S Ni Fe
Total Quantity of Other Elements
Requirement ≤2.00 ≤1.00 ≤2.50 ≤0.030 ≥90 ≤8 ≤1.00
Typical Value 0.591 0.07 1.50 0.004 94.00 0.021 一 
Diameters/Length/Reference Current (AC or DC+) Electrode Diameter (mm) 2.5 3.2 4.0 5.0 Electrode Length (mm) 300 350 350 350 Welding Current (A) 60-90 90-120 130-180 190-220 
 
 
Notes on Usages: 1. The electrodes must be baked under about 150℃ for an hour before welding. 2. By hammering the weld, the stress in the welded areas can be eliminated and cracks can be avoided.

 

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