AK-ER4043 Aluminum-Silicon Welding Wire for 6xxx Series Alloys.
An Al-Si alloy wire with higher silicon content for improved fluidity and crack resistance, suitable for welding 6xxx series base metals and cast or forged materials.
Product Overview
AK-ER4043 is an aluminum-silicon alloy welding wire designed for use with 6xxx series aluminum alloys, particularly where post-weld thermal treatment is required. The higher silicon content enhances weld pool fluidity, which improves wetting and bead appearance on complex or thin sections.
This wire is formulated to resist hot cracking, making it suitable for welding both wrought and cast materials. It is supplied in diameters and lengths consistent with standard TIG and MIG welding practices, and is intended for use in manual and semi-automatic welding processes.
Application: Welding for 6xxx series alloys.
Key Benefits
Improved Fluidity from Higher Silicon.
The 4.5-6.0 percent silicon content increases the fluidity of the molten weld pool, which helps achieve better fusion and a smoother bead profile, especially on challenging joint geometries.
Crack Resistance in Heat-Treated Alloys.
AK-ER4043 is not sensitive to weld cracking, which is critical when joining 6xxx series alloys that are often used in applications requiring post-weld heat treatment.
Suitable for Cast and Forged Materials.
The wire can be used to weld both cast and forged aluminum components, making it a versatile choice for repair and fabrication tasks involving 6xxx series materials.
Consistent Chemical Composition
The composition is tightly controlled, with silicon at 4.5-6.0 percent, iron ≤0.80 percent, copper ≤0.03 percent, manganese ≤0.05 percent, magnesium ≤0.05 percent, zinc ≤0.10 percent, titanium ≤0.20 percent, and beryllium ≤0.0003 percent.
Where It Is Used
- Welding of 6xxx series aluminum alloys.
- Repair and fabrication of cast aluminum components.
- Welding of forged aluminum parts.
- TIG and MIG welding in structural and industrial applications.
Who It Is For
- Welding consumable distributors supplying aluminum welding wires.
- Fabricators working with 6xxx series aluminum alloys.
- Maintenance teams repairing cast or forged aluminum parts in industrial settings.
Problems It Solves
- Weld cracking in 6xxx series alloys during or after welding, especially when heat treatment is applied.
- Poor weld pool fluidity to incomplete fusion or unsatisfactory bead appearance.
- Difficulty in welding cast or forged aluminum materials due to sensitivity to cracking.
Specifications
Published by the factory for AK-ER4043 (TIG / MIG). Values not shown are not published on the datasheet and are marked as such rather than estimated.
| Element | Content |
|---|---|
| Si | 4.5-6.0 |
| Fe | ≤0.80 |
| Cu | ≤0.03 |
| Mn | ≤0.05 |
| Mg | ≤0.05 |
| Zn | ≤0.10 |
| Al | bal |
| Be | ≤0.0003 |
| Ti | ≤0.20 |
| Property | Value |
|---|---|
| Tensile strength (MPa) | 105 |
| Yield Stress (MPa) | 155 |
| Elongation (%) | 15 |
Technical Features
- Al-Si alloy with silicon content between 4.5 and 6.0 percent.
- Iron ≤0.80 percent, copper ≤0.03 percent, manganese ≤0.05 percent, magnesium ≤0.05 percent, zinc ≤0.10 percent, titanium ≤0.20 percent, beryllium ≤0.0003 percent.
- Deposited metal tensile strength at least 105 MPa, yield stress at least 155 MPa, elongation at least 15 percent.
- Suitable for TIG and MIG welding processes.
Use Guide
- Select wire diameter based on base metal thickness and welding process.
- Clean the base metal surface thoroughly to remove oil, grease, oxide, and moisture before welding.
- Use inert gas shielding (argon or argon-helium mix) with appropriate flow rate to prevent porosity and oxidation.
- Maintain proper torch angle and travel speed to ensure consistent penetration and bead profile.
How It Compares
AK-ER4043 is an Al-Si alloy wire with higher silicon content than standard ER4043, which improves fluidity and reduces the risk of hot cracking. It is preferred over lower-silicon alternatives when welding 6xxx series alloys or cast/forged materials. Unlike ER5356, which contains magnesium and is used for higher-strength 5xxx series alloys, AK-ER4043 is not suitable for applications requiring high strength or corrosion resistance in chloride environments.
Related Grades
Other welding and brazing rods in the same family.
AK-ER4043 (TIG / MIG) Questions
What is the silicon content range in AK-ER4043?
What are the mechanical properties of the deposited metal?
Can this wire be used for welding cast aluminum?
What is the maximum allowed copper content?
What packing is AK-ER4043 (TIG / MIG) supplied in?
Can we test AK-ER4043 (TIG / MIG) before placing a production order?
Request a Quotation for AK-ER4043 (TIG / MIG)
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