a. General. (1) Oxides of all ordinary commercial metals have higher melting points than the metals and alloys (except steel) have themselves. They are usually pasty when the metal is quite fluid and at the proper welding temperature. An efficient flux will combine with oxides to form a fusible slag. The slag will have a melting point lower than the
Read more →Welding Sheet Metal. (1) For welding purposes, the term “sheet metal” is restricted to thicknesses of metals up to and including 1/8 in. (3.2 mm). (2) Welds in sheet metal up to 1/16 in. (1.6 mm) thick can be made satisfactorily by flanging the edges at the joint. The flanges must be at least equal to the thickness of the
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