Description: ER4043 is an aluminum-silicon alloy welding wire containing 5% silicon, with a melting point of 573-625, good fluidity, strong thermal crack resistance, but insufficient ductility (ie, poor plasticity). Due to the high silicon content, when used for welding high magnesium alloys, brittle Mg2Si is easily formed in the weld, which reduces the plasticity and corrosion resistance of the joint. In addition, the color of the weld surface is dark, and the color of the base metal is different after anodization.

Uses: Used as filler material for argon arc welding and gas welding of aluminum alloy workpieces and castings other than aluminum magnesium alloys. Commonly used for welding of 600 series aluminum alloys such as 6061, 3000 series and 2000 series aluminum alloys and cast aluminum. Widely used in railway locomotives, chemical industry, food and other industries.

Note: Due to poor plasticity, joints that require plastic deformation processing after butt welding should be avoided.

The properties are following:

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