Alloy 4043 description:
Alloy Characteristics
Alloy 4043 is one of the oldest and most widely used welding and brazing alloys. Almigweld and altigweld 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.

Features
Welding Filler Wire
Spray and Flame Metallizing Wire

Typical Applications
Trade designation: ALMIGWELD and ALTIGWELD
Non-Heat treatable
Similar to AlSi5 (Germany), BS N21 (United Kingdom)
ISO designation: AlSi5
Principle alloying elements: Silicon
Applicable specifications: ANSI/AWS A5.10 (ER & R), AMS 4190