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When an arc is struck between the metal rod (electrode) and the workpiece, both the rod and workpiece surface melt to form a weld pool. Simultaneous melting of the flux coating on the rod will form gas and slag which protects the weld pool from the surrounding atmosphere. Refer to www.boc.com.au or www.boc.co.nz. Fundamentals of Manual Metal Arc (MMA) Welding. Recommended Electrode Sizes. Average Thickness of Plate or. Manual Metal Arc (MMA) welding is the most flexible and one of the most and involves striking an arc between a covered metal electrode and a workpiece. Description Classifications OK 76.28 is a basic flux covered lowhydrogen manual metal arc weldingelectrode which deposits 2 > EN 1599ECr Mo 2 B42 Shielded arc or heavy coated welding electrodes electrodes protect the molten metal with a 26 Jul 2011 ESAB is offering free copies of its latest 64-page Manual Metal Arc Electrodes catalogue that lists hundreds of products for MMA welding. MMA welding consists of creating a high-intensity electric arc between a shielded metal-cored electrode and the metals to be joined. Oerlikon can provide a Arc welding with coated electrodes is a manual process where the heat source consists of the electric arc. When the arc strikes between the coated electrode (by Arc electrode welding. Manual metal arc welding is a metal arc welding process (MMAW) in which an electrical arc burns between a sheathed rod electrode and
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