TIG FILLER WIRE 4047 ALUM - 10% SILICON 3.2MM
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TIG Filler Wire ER4047 Aluminium-Silicon Alloy (10% Si) – 3.2mm
Product Description
Achieve strong, crack-free welds on aluminum castings and dissimilar aluminum alloys with our ER4047 TIG Filler Wire, precision-manufactured in a 3.2mm (1/8") diameter for reliable, consistent feeding and arc performance. Formulated with 10% silicon, this aluminum filler wire is the industry-preferred choice for welders who need excellent flow characteristics, reduced hot cracking, and superior wetting action on a wide range of base metals.
Key Features
- Alloy Composition: Aluminum-Silicon (Al-Si) alloy with 10% silicon content, conforming to AWS A5.10 ER4047 classification
- Diameter: 3.2mm (1/8 inch) – ideal for medium-to-thick section welding
- Low Melting Point: Silicon content lowers the melting range, improving puddle control and reducing distortion
- Excellent Fluidity: Superior wetting action produces smooth, uniform weld beads with minimal porosity
- Crack Resistance: High silicon content significantly reduces hot cracking susceptibility, especially on castings and highly restrained joints
- Clean, Bright Finish: Precision-drawn and surface-cleaned for contamination-free welds and smooth wire feeding
- Versatile Compatibility: Suitable for welding 3003, 4043, 4045, 6061, 6063, and cast aluminum alloys (356, 319, 380)
Common Applications
- Automotive castings and engine components
- Aluminum cylinder heads and transmission housings
- HVAC and refrigeration systems
- General aluminum casting repair
- Heat exchangers and radiators
- Marine and structural aluminum fabrication
- Dissimilar aluminum alloy joining
Why Choose ER4047 (10% Silicon) Filler Wire?
Compared to ER4043 (5% silicon), ER4047's higher silicon content offers better fluidity, lower melting temperature, and greater resistance to weld cracking, making it especially effective for thick castings, high-restraint joints, and repair welding where hot cracking is a common concern. Its excellent flow also allows for smoother cosmetic welds with less post-weld finishing.
Technical Specifications
| Property | Specification |
|---|---|
| AWS Classification | ER4047 |
| Diameter | 3.2mm (1/8") |
| Silicon Content | ~10% |
| Base Alloy | Aluminum (Al) |
| Melting Range | Approx. 577–632°C (1071–1170°F) |
| Process | GTAW / TIG Welding |
| Standard | AWS A5.10 / ASME SFA-5.10 |
Recommended Shielding Gas
Pure Argon (100%) is typically recommended for optimal arc stability and weld pool control when TIG welding with ER4047.
This product is priced “per KG”. The minimum quantity available to purchase is shown in the "Pack Qty".