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As the sharpened carbon electrode is drawn along the metal, an arc forms and melts the metal. The air jet is used to blow away molten material. This can be dangerous, as the molten material can be blown substantial distances. The process is also very noisy. Metal removal is rapid, and when properly
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This process is useful for cutting a variety of materials, but it is most often used for cutting and gouging aluminum, copper, iron, magnesium, and carbon and stainless steel. Because the metal is blown away by the air jet, it does not need to be oxidized. This process differs from
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Air pressure for the jet usually varies from 60 to 100 psi (4-7 bar). The carbon electrode can be worn away by oxidation due to heat buildup. This can be reduced by coating the electrodes with copper.
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operations because in air carbon cutting an open, unconstricted arc is used, and the arc operates separately from the air jet.
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of a carbon arc. Molten metal is then removed by a blast of
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