I'm welding aluminium 5754, which grade of TIG filler wire do I need?

We would recommend MW 5556 TIG Filler Wire. The higher Mg content in 5556 helps to offset the 3 Mg in the 5754 alloy and steers it away from the 3Mg critical level.

There is a matching filler alloy manufactured, but not in common circulation from my experience. MW 5556 is a high strength weld alloy and is popular, and is much preferred to 5356 filler metal.

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