ER4043 is one of the oldest and most widely used welding and brazing alloys. 4043 can be classified as a general purpose type filler alloy. The silicon additions result in improved fluidity (wetting action) to make the alloy a preferred choice by welders. The alloy is less sensitive to weld cracking and produces brighter, almost smut-free welds.

5% Silicon, softer than 5356, it is a general purpose filler alloy

Excellent for joining cast to wrought form alloys. 

Available in the following 500g spools: 0.9mm