Aluminum Wire
ER4047 Aluminum Welding Wire
ER4047 (commonly referred to as “718 aluminum” or AISi12) is an aluminum filler metal which contains approximately 12% silicon.
产品名称 ER4047
ALUMINUM WELDING WIRE (MIG & TIG)
ER4047 (commonly referred to as “718 aluminum” or AISi12) is an aluminum filler metal which contains approximately 12% silicon.
Key Features: Higher silicon content than ER4043, with narrow freezing range, lower melting point and excellent weld pool fluidity.
Applicable Standards
Applicable Standards: American Standard: AWS A5.10 ER4047
European Standard: EN ISO 18273：S Al 4047
Welding Polarity
MIG (GMAW): DCEP
TIG (GTAW): AC (HF arc stabilization)
Shielding Gas
Preferred: 100% pure Ar. Ar+He mixture for thick plates.
Flow rate: MIG 18–25 L/min, TIG 12–18 L/min
Standard Diameter & Packaging
• MIG wires: 0.8/0.9/1.0/1.2/1.6 mm, Standard spools: 0.45kg, 0.5kg, 1kg, 2kg,6 kg, 7 kg
• TIG rods: 1.6/2.0/2.4/3.2/4.0/5.0 mm, 1m fixed length, packed in5kg plastic tube and 5kg cardboard box.
Mechanical Properties of Deposited Metal
• Tensile Strength: 190–230 MPa
• Yield Strength: 110–130 MPa
• Elongation (A5): 7%–12% (low ductility, brittle weld)
• Melting Range: 574–580℃
Key Advantages
• Superior weld pool fluidity & wettability vs ER4043; suitable for wide-gap joints, thin parts and cast aluminum repair
• Outstanding hot crack resistance, preferred for castings and crack-sensitive aluminum alloys
• Low distortion & shrinkage, good sealing for pressurized heat exchangers
• Works for MIG/TIG welding and flame aluminum brazing
• Stable arc, bright weld bead and low spatter
Recommended Base Metals
✅ Recommended Cast aluminum (ADC12, A356 die/sand cast), 1xxx pure Al, 3xxx Al-Mn, 6xxx (6061, 6063) Al-Mg-Si alloys
✅ Dissimilar welding: Cast Al ↔ wrought Al; 1xxx/3xxx/6xxx inter-series welding
❌ Not allowed Do not weld 5xxx high-Mg alloys (5052, 5083, 5456). Si and Mg form brittle Mg₂Si, leading to hot cracking and poor toughness/corrosion resistance.
Careful use on anodized visible parts; welds show dark grey-black color with noticeable color difference.
Applications
• Automotive aluminum water tanks, radiators, intercoolers & AC pipes
• Crack repair for die-cast aluminum housings and engine aluminum castings
-Seam welding of aluminum heat exchangers, refrigeration units and thin-wall aluminum tubes
• Bicycle frames and general aluminum casting maintenance
• Filler metal for aluminum flame brazing
What should we do before welding ER4047?
• Fully remove grease and oxide film from grooves to avoid porosity.