Description:
 Z408 is graphitic type coating with Nickel/Ferro core electrode and it is machinable one. The electrode is suitable for repairing or surfacing cracked and worm parts made of gray iron or nodular iron, as well as joining cast iron with dissimilar metals. Lower current is recommended to obtain better welding operation. Before welding the electrode should be baked 1 hour at a temperature around 150degree.
 
APPLICATIONS:
used for repair welding thin pieces and processing surface of cast iron ,as well as important gray cast iron pieces.such as engine gear box, maching tools,guideway,etc 

Matters need attention:
1.  Similar crack-resistance for gray cast iron  with Z308,Ieffective for cast iron with high phosphorus content (0.2%P). The machinability is a little worse than that of Z308 and Z508. 
2. When welding, narrow channel of transport bar is appropriate,  each welding line should not be more than 50 mm in length, hammering the weld  with the hammer immediately after welding, in order to eliminate the welding zone stress, to prevent cracks
3. Welding electrodes must be baked about 1 hour under around 150 degrees