OCEAN WELDING ER4043 AlSi5 Welding Wire
Introduction
When welding 6061 aluminum alloy frames, 6063 aluminum extrusions, or cast aluminum components, weld cracking-and the resulting need for rework-is a major headache. OCEAN WELDING ER4043 aluminum-silicon welding wire is specifically engineered to suppress the tendency for hot cracking in heat-treatable alloys, helping you achieve high-quality welds on the first pass and complete your work efficiently.
Key Features
1. Excellent crack resistance for 6xxx series alloys
With a silicon content of 4.5%–6.0%, shrinkage stress in the weld pool is reduced. This makes ER4043 far superior to 5xxx series filler metals in terms of crack resistance when welding 6xxx series base metals like 6061 and 6063.
2. Superior weld pool fluidity and minimal spatter
Silicon lowers the melting point (577–600°C) and improves wetting characteristics, ensuring smooth weld pool flow and uniform joint filling. It produces virtually no spatter, eliminating the need for post-weld grinding or cleanup.
3. Neat and aesthetically pleasing welds
A stable arc combined with excellent weld pool fluidity results in a smooth, uniform weld appearance that requires little to no post-weld finishing. After anodizing, the weld takes on a light gray color that closely matches the base metal.
4. Suitable for all-position welding
Certified for all-position welding (excluding vertical-down) using GMAW/MIG and GTAW/TIG processes, offering flexibility for various joint configurations in both construction site and workshop environments.
5. Factory-direct sales with high cost-effectiveness
Manufactured in OCEAN WELDING's own facilities, every spool undergoes rigorous quality control. With no middleman markups, you receive consistent, high-quality products that deliver reliable welding performance while maintaining healthy profit margins.
Specifications
| Parameter | Details |
|---|---|
| Alloy Designation | ER4043 (AlSi5) |
| Silicon Content | 4.5 – 6.0% |
| Melting Range | 577 – 600°C |
| Tensile Strength | 145 – 190 MPa |
| Elongation | 8 – 12% |
| Density | 2.66 g/cm³ |
| Electrical Conductivity | ~32% IACS |
| Standards | AWS A5.10 ER4043 · AMS 4190 · ISO 18273 S Al 4043 |
| Shielding Gas | 100% Ar or Ar + ≤30% He |
| Welding Positions | All positions (except vertical down) |
Available Forms & Sizes
| Product Type | Diameters | Packaging Options |
|---|---|---|
| MIG Wire (GMAW) - Coiled / Spooled | 0.8 / 0.9 / 1.0 / 1.2 / 1.6 mm | 1 kg / 5 kg / 15 kg per spool, 1 spool per carton |
| TIG Rod (GTAW) | 1.6 / 2.4 / 3.2 mm (1000 mm length) | 5 kg/box · 10 kg/box |
| Metal-Cored Wire | 1.2 / 1.6 mm | S300 (7 kg) · S360 (20 kg) |
| Flux-Cored Wire | 1.6 / 2.0 mm | S200 (2 kg) · S300 (7 kg) |
Application Areas
Automotive & Transportation: Body panels, truck trailers, bicycle frames
Aerospace: Fuselage skin repair, frame structures
General Manufacturing: Structural frames, housings, brackets
Heat Exchangers & HVAC: Tube-to-sheet joints, evaporators, condensers
Maintenance & Repair: Cast aluminum parts, on-site repairs
Ordering & Shipping - Coiled Wire (MIG)
| Item | Details |
|---|---|
| Minimum Order | 1,000 kg (1 metric ton) |
| Payment Terms | 30% TT prepayment, 70% TT before delivery |
| Packing | 1 kg / 5 kg / 15 kg per spool, 1 spool per carton |
| Production Time | Within 25 days after receiving prepayment |
FAQ
Q: Can I use ER4043 on 5052 base metal?
A: Yes, ER4043 is compatible with 5xxx series alloys where the magnesium content is ≤ 2.5%. For higher-Mg 5xxx alloys (like 5083), ER5356 is generally recommended to avoid brittle Mg₂Si formation.
Q: Why choose ER4043 over ER5356?
A: ER4043 offers better crack resistance on 6xxx series alloys, lower melting point for easier puddle control, and less spatter. ER5356 provides higher tensile strength and better color match after anodizing. Choose based on your base metal and post-weld requirements.
Q: What shielding gas should I use?
A: 100% argon is the standard choice. For thicker sections or metals with high thermal conductivity, an argon/helium mix (up to 30% helium) can improve penetration and travel speed.
Q: Do you provide material test reports?
A: All products are manufactured to AWS A5.10 / ISO 18273 standards. If you require specific test documentation, please contact us to discuss your requirements.
Q: What are the payment terms?
A: For coiled wire orders, we require 30% TT prepayment and the remaining 70% TT before delivery. Production starts after the prepayment is received, and the order is completed within 25 days.
Q: How is the wire packed for shipping?
A: Coiled wire comes on plastic spools in three sizes - 1 kg, 5 kg, and 15 kg per spool. Each spool is individually packed in a carton for protection during transit.
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