TIG FILLER WIRE 4043 ALUM - 5% SILICON 1.6MM

TIG Filler Wire ER4043 – 5% Silicon Aluminum Alloy, 1.6mm

Product Overview

This ER4043 TIG filler wire is a premium aluminum-silicon welding rod designed for precision GTAW (Gas Tungsten Arc Welding) applications. Featuring a 5% silicon content, this 1.6mm (1/16") diameter filler wire delivers smooth, stable arc performance and excellent weld puddle control — making it a top choice for welders working with cast and wrought aluminum alloys.

Key Specifications

• Alloy Classification: ER4043 (AlSi5)
• Diameter: 1.6mm (0.063" / 1/16")
• Silicon Content: ~5%
• Base Metal: Aluminum alloy
• Process Compatibility: TIG (GTAW), also suitable for MIG (GMAW) and gas welding
• Typical Length: 1 meter / 36" straight lengths (packaging may vary)

Why Choose ER4043 Filler Wire?

Excellent Fluidity & Crack Resistance The added silicon lowers the melting point and increases weld puddle fluidity, reducing the risk of hot cracking — especially valuable when welding higher-silicon casting alloys.

Smooth, Clean Welds Produces welds with a bright, matte-grey finish and minimal spatter, ideal for both structural and cosmetic applications.

Versatile Alloy Compatibility Well suited for welding 6061, 6063, and other 6xxx series aluminum, as well as most aluminum castings (3xx.x series).

Common Applications

• Automotive and marine aluminum fabrication
• Aluminum casting repair
• General-purpose aluminum sheet and structural welding
• Bicycle frame and light fabrication work
• HVAC and architectural aluminum components
• Hobbyist and professional welding shops

Usage Tips

• Use with 100% Argon shielding gas for optimal arc stability
• Recommended for welding aluminum thicknesses from thin-gauge sheet up to medium structural sections
• Store in a dry, moisture-free environment to prevent oxidation and porosity
• Clean base metal thoroughly before welding to reduce contamination risk

Ideal For

Welders, fabricators, auto body shops, and DIY enthusiasts seeking a reliable, easy-to-use aluminum filler wire for TIG welding projects requiring strong, clean, crack-resistant joints.

This product is priced “per KG”. The minimum quantity available to purchase is shown in the "Pack Qty".