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Blue Demon - ERAZ92A magnesium welding alloy is a good choice when welding magnesium base metals of similar chemical composition. It produces superior joints with the maximum tensile strengths offered by these alloys. Cleanliness of both the filler metal and base metal is extremely important when welding with magnesium. Flux is NOT required for TIG or MIG welding processes of ERAZ92A magnesium alloy. Although Oxy-acetylene welding of this alloy is uncommon it can be done and should be limited to single-pass welding on thin gauge magnesium materials.
AWS Specification ANSi/AWS A5.19-92 (R2006)AWS Classification ERAZ92A
http://proweldwelding.com.au/resources/images/ERAZ92A.pdf