Ferro-nickel electrode for joining and refacing cast iron.
Due to the high mechanical characteristics and the good resistance to cracking, Lastek 47E is very suitable for welding parts with large wall thickness and for joining cast iron to steel. The high deposit rate makes this electrode especially designed to reface large sized cast iron work pieces when welded on DC plus pole (DC EP).
Good machinable deposit.
Welding parts with high stress concentration or high strength cast iron.
Filling in blow holes in ordinary cast iron, nodular cast iron or ‘Meehanite”.
Refacing cast iron dies in the car industry.
Lastek 47E can be welded either on AC or DC.
For refacing use DC + pole (DC EP).
For joining and small joints use DC - pole (DC EN).
When joining cast iron to steel, weld 2/3 on cast iron end 1/3 on steel.
The pulsating arc (when welded on DC negative) creates alternatively a heating phase (oil and dirt are burned away) and a deposit phase.
Perform a back and forward movement in the direction of the weld: phase 1 (forward) and phase 2 (back).
To avoid stress build up the weld can be hammered, certainly when welding restrained parts.