Which grades of aluminium alloys are suitable for welding applications?

Which grades of aluminium alloys are suitable for welding applications?

Aluminium can be conveniently divided into different categories or families with the same characteristics. The symbol for an aluminium alloy usually consists of four digits, with the preceding digit used to indicate the series to which it belongs. The weldability of an alloy can be determined from the alloy series. It is also helpful to know which welding rod or wire is suitable. So which grades of aluminium alloys are suitable for welding applications? Let's find out together today!

Generally speaking, 1 series aluminium alloys, 3 series aluminium alloys, and 5 series aluminium alloys are more suitable for welding, which we will then describe in more detail. Nearly pure aluminium 1XXX series alloys. These alloys are considered easy to weld. 1100 aluminium is often used as filler. 3XXX alloys have medium strength and are considered to be very easy to form and therefore very good for welding. They are welded using 4043 or 5356 as filler rod material. 4XXX series are also highly weldable, but these alloys are often used as electrode/wire material. 5XXX series are also easy to weld and are often used as electrodes in combination with 5356, 5183 or 5556.

The 2XXX, 6XXX and 7XXX alloys have disadvantages in terms of welding, but there are some exceptions. 2XXX alloys are strong and difficult to weld, with the exception of 2219 and 2519 alloys. 2319 or 4043 are recommended fillers. crack easily at high temperatures, but they can be welded using appropriate techniques, usually using 4043 or 5356 as filler material. 7XXX alloys have problems with cracking and corrosion, but three special alloys 7003, 7005 and 7039 can be welded using 5356 as filler.

We at Haomei Aluminium, as a professional aluminium alloy manufacturer and seller can supply 1 series aluminium alloy, 2 series aluminium alloy, 3 series aluminium alloy, 5 series aluminium alloy, 6 series aluminium alloy and 7 series aluminium alloy. If you need these materials or aluminium sheets, please contact us!