Weldcote 4043 (commonly referred to as AlSi5) is a 5% silicon aluminum filler metal that is available in Spools or cut lengths for MIG or TIG welding processes.

• 4043 aluminum filler metal is recommended for welding 3003, 3004, 5052, 6061, 6063 and casting alloys 43, 355, 356 and 214.
• The melting range is 1065-1170?F with a density of .097 lbs./cu.in.
• The average tensile strength is 27,000 psi, average yield strength of 18,000 psi and the post anodizing color is gray.
• 4043 aluminum filler metal is one of the oldest and most widely used welding and brazing alloys.
• The silicon additions result in improved fluidity (wetting action) to make the alloy a preferred choice by welders.