TIG Rod ER4043 Aluminium + 5% Silicon, 3.2mm Diameter, 1M Length
AWS-classified ER4043 TIG filler rod for aluminum alloy welding with excellent crack resistance and superior weld finish.
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TIG Rod ER4043 Aluminium + 5% Silicon, 3.2mm Diameter
Brief Overview
The ER4043 is the industry standard for TIG welding of aluminum alloys where thermal crack resistance and cosmetic weld quality are non-negotiable. This 3.2mm diameter rod delivers consistent, bright, and ductile welds across a wide range of aluminum applications—from automotive components to marine vessels. The 4.5–6.0% silicon content ensures superior fluidity during welding while maintaining structural integrity in the heat-affected zone. For shops managing mixed-alloy production, pairing this rod with stainless steel TIG alternatives provides complete material coverage.
Key Features
- AWS A5.10 & GB/T Certified: ER4043 classification ensures compliance with international welding standards and customer specifications
- High Silicon Content (4.5–6.0%): Improves weld pool fluidity and reduces cracking risk in aluminum castings and wrought alloys
- Thermal Crack Resistance: Specifically engineered to prevent hot cracks in 6000 and 1000 series aluminum alloys
- Bright, Shiny Welds: Produces cosmetically superior welds that require minimal cleanup—ideal for visible and structural joints
- Versatile Alloy Compatibility: Works with Al-Si and Al-Si-Mg alloys containing up to 2% total alloying elements and 7% silicon
- 3.2mm Diameter: Standard industrial size for general-purpose aluminum TIG welding; balances deposition rate with control
- 1-Meter Length Spool: Compact 5kg package for ergonomic handling and efficient storage
Technical Specifications
| Parameter | Specification |
|---|---|
| Diameter | 3.2mm |
| Length | 1M (per spool) |
| Weight per Spool | 5kg |
| AWS Classification | AWS A5.10 ER4043 |
| GB/T Classification | GB/T858-2008 SAI 4043 |
| Silicon Content | 4.5–6.0% |
| Iron Content | ≤0.80% |
| Magnesium Content | ≤0.05% |
| Manganese Content | ≤0.05% |
| Carbon Content | ≤0.30% |
| Zinc Content | ≤0.10% |
| Titanium Content | ≤0.20% |
| Aluminum Base | Balance (remainder) |
Business Advantages for Resellers
- High Demand Consumable: ER4043 is the backbone of aluminum TIG welding operations; consistent reorder business from automotive, marine, and fabrication shops
- Established Market Specification: AWS and GB/T certification means zero customer pushback—this rod fits standard procurement requirements
- Compact, Efficient Packaging: 5kg spools maximize shelf density while remaining easy to handle for operators
- Margin-Friendly Volume: 1M length per spool encourages bulk orders and predictable usage rates across shop operations
- Cross-Sell Potential: Pair with stainless steel rods for shops transitioning between material types or managing mixed-alloy inventory
Ideal Applications
- Automotive: Engine blocks, cylinder heads, and structural aluminum components
- Marine & Shipbuilding: Hull welds and pressure vessels where salt-water corrosion resistance is critical
- Mold Manufacturing: Dies and tooling for plastic injection molding
- Chemical & Metallurgical Equipment: Tanks, reactors, and processing vessels
- Casting & Forging Operations: Repair and joining of aluminum castings with minimal reheat cracking
Stock this ER4043 rod as a baseline aluminum TIG offering. Its reputation for preventing thermal cracks and delivering bright welds makes it a non-negotiable inventory item for any shop serious about aluminum fabrication.