Aluminum is the most difficult alloy. Initially, aluminum oxide should be cleaned from the surface. Heat treatable aluminum alloys receive their strength from a process called ageing. Notable decrease in tensile strength will happen when welding aluminum due to over-ageing.

Welding aluminum is very easy as it melts easily in low temperature and does not crack after solidifying. Aluminum welding is done according to the type of aluminum used like non-heat treatable alloys containing small amounts of manganese or magnesium and heat treatable alloys containing copper, silicon, zinc or magnesium. These types of aluminum can be welded easily but other metals like copper and lead are difficult to weld and often lead to crack while welding.

Different process of aluminum welding is TIG welding, MIG welding, gas, plasma, resistance welding etc. TIG Welding is best suited for welding pipes and repairing castings. MIG welding is best suited for welding thicker aluminum work pieces at a faster rate and for achieving long, continuous welds. Always clean the aluminum before welding, to remove the oxide layer. Use a stainless steel wire brush used for cleaning aluminum.

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Tags: aluminum welders, Aluminum Welding