For the high strength gray cast iron and nodular cast iron’s repair welding, such as cylinder, engine bearer, gear box.
Characteristics:
THZ408 is cast iron electrode made by graphite type coating and Ni-Fe core rod. Can be weld by AC or DC and not need preheating or just preheating to 200℃ when welding. High strength, excellent elongation and lower coefficient of linear expansion of welding metal.
Attention:
1. The electrode must be re-dry by 140℃-160℃ for 1 hour before welding.
2. To avoid the crack, hammer the welding pass as soon as after welding is be suggested.
