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Q - I work with aluminum-welded structures of different alloy types and designs. I also work with both heat treatable and non-heat treatable alloys. I would like to know how the arc welding of these alloys affects the strength of the heat-affected zone of the weld.
I come into contact with two aluminum alloys of which I have found difficulty in obtaining information about arc welding. These alloys are 2024 and 7075. Can you provide me with information on how to weld these alloys with either the GMAW or GTAW process?
Q - I have recently been involved in the development of aluminum arc welded structures. Having worked with steel structures for many years, aluminum is new to me. How can I identify the aluminum base material strengths, filler alloy strengths and the as-welded joint strengths of aluminum welds. I am also confused by the AWS filler alloy classifications for aluminum. They do not give the filler alloy strength, unlike the classification for steel, which includes the minimum tensile strength of the filler alloy.
As a basic description we can say that 4043 is an aluminum filler alloy with 5% silicon added and that 5356 is an aluminum filler alloy with 5% magnesium added. There are some misconceptions within the industry that you can successfully weld any aluminum base alloy with either 4043 or 5356 filler alloy. I must start by saying that this is not the case. However, there are many common structural aluminum base alloys that can be welded with either 4043 or 5356. One such alloy is 6061.
I am looking for some assistance with the selection of the most suitable filler alloy for a particular GMAW welded aluminum structure. Application: Structural component used for material handling manufactured from 6061-T6 in material thicknesses of 1/8 to 1/2 inch.