MMA ElectrodesMMA electrodes are used to weld a wide variety of ferrous and non-ferrous alloys. While the predominant market for MMA electrodes is for joining, some are made specially for hard facing, while others have modified coatings and are used for cutting, gouging and grooving. A MMA electrode normally consists of a metal core wire covered with a flux coating, which is extruded concentrically around the core wire. The metal core may be carbon steel, alloy steel, stainless steel, nickel alloy, copper alloy, cast iron, aluminium alloy, or even special hard facing alloys. The coating may contain many different metallic and non-metallic compounds, including, oxides, carbonates, fluorides, organic materials, and metal powders all held together with silicate binders. The exact compositions of electrode coatings are jealously guarded by manufacturers and will depend on the specific purposes of any particular electrodes.
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