Alloy 4043 is one of the oldest and most widely used welding and brazing alloys. PROSTAR 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.
4043 will typically provide a higher rating for weldability and provide slightly lower crack sensitivity. 4043 will generally tend to produce welds with improved cosmetic appearance, smoother surfaces, less spatter and less smut.
4043 is suitable for service temperatures above 150° F.
Aluminum 0.035" Wire.
