Aluminium TIG Wire – ER4043, a high-quality 4043 grade aluminium TIG welding wire, contains 5% silicon. Recognized for its general-purpose filler alloy classification, ER4043 provides excellent fluidity (wetting action) due to silicon additions. With its ability to produce brighter, cleaner welds and resistance to weld cracking, it’s suitable for joining cast to wrought materials and is non-heat treatable.