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ALUMAG W 235

Unitor Alumag-W is a magnesium alloyed wire for welding all common wrought and cast aluminium alloys, e.g. AlMg, AlMgMn, AlMgSi and AlMg(Cu) alloys. It is specially suited for welds which must be resistant to seawater and high tension, and also where high ductility is required. Use pure Argon as shielding gas. As the aluminium wire is quite soft, torch cables of more than 3 m length should be avoided. Longer cables may cause uneven or interrupted wire feed.

Clean the joints and adjacent surfaces thoroughly. Use a stainless steel brush, not an ordinary steel brush which will rub iron oxides into the aluminium and contaminate the weld pool. Cast aluminium should be preheated to approximately 300 °C before welding is commenced. Make sure that cast components that have to be pre-heated are well supported, so that they do not sag when temperature rises. Cast alloys that have been preheated must be allowed to cool slowly after being welded.

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