How to Weld Aluminum - Learn To Weld Aluminum
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If the weld puddle cools too quickly, a crater will form in the final bead as it solidifies. Craters are bad because that's where any cracks that can develop in the piece will appear. To prevent this, be sure the bead cools slowly. Ease off the pedal to reduce the heat at the end of the pass and simultaneously add more filler than normal. The extra filler and lower temperature will cause the weld to cool sufficiently enough to not form a crater. View Related Article
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