4043 aluminium alloy
4043 aluminium alloy is a wrought aluminium alloy with good corrosion resistance typically used as filler material for welding of aluminium parts. It contains high amounts of silicon and trace amounts of other metals. It is grey in appearance and is sold as either welding wire or welding rod for TIG/MIG processes.
Chemical composition
Aluminium is the remainder.| Element | Percentage |
| Silicon | 4.5-6.0 |
| Iron | 0.80 |
| Copper | 0.30 |
| Manganese | 0.05 |
| Magnesium | 0.05 |
| Zinc | 0.10 |
| Titanium | 0.20 |
| Beryllium | 0.0003 |