|Part Number 7725|
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Cutting, Gouging and Piercing
The Austarc is a smooth running basic type of low hydrogen iron powder electrode used for all positional welding except vertical down. The arc is very quiet with little spatter and the welds are exceptionally smooth with excellent wash in at the toes of the weld, thus giving minimum undercut. This electrode is used where the highest restrained work pieces are fabricated for mining equipment, pressure vessels, heavy girders, earth moving plant, repair and maintenance etc.
For the highest weld quality with low hydrogen levels, Austarc 77 electrodes should be baked at 400Â°C for one hour to obtain <5mL/100g weld metal. After baking, the electrodes should be used from a hot box set at 100 -150 Â°C.