Aluminium TIG Wire – ER4043, a high-quality 4043 grade aluminium TIG welding wire, contains 5% silicon. Widely recognized for its general-purpose filler alloy classification, ER4043 offers improved fluidity (wetting action) due to silicon additions. This alloy is less prone to weld cracking and produces brighter, cleaner welds, suitable for joining cast to wrought materials and is non-heat treatable.