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  • Manual Metal Arc Welding (MMA) & Gas Metal Arc Welding (GMAW)

     

    Essays5 Economics

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ID number:811667
 
Evaluation:
Published: 01.12.1996.
Language: English
Level: Secondary school
Literature: n/a
References: Not used
Extract

Introduction:
Manual metal arc welding was first invented in Russia in 1888. It involved a bare metal rod with no flux coating to give a protective gas shield. The development of coated electrodes did not occur until the early 1900s when the Kjellberg process was invented in Sweden and the Quasi-arc method was invented in the UK. But the coated electrodes used these days were slow to be adopted because of their high cost. But because the need for strong welds grew, manual metal arc and coated electrodes became a unit; Stainless steel, inconel, nickel and cast iron electrodes are also commo…

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