Aluminum Wire
ER4046 Aluminum Welding Wire
ER4046 (AlSi10Mg) is an aluminum-silicon-magnesium filler wire for welding cast aluminum and 6xxx wrought aluminum alloys.
ER4046
ALUMINUM WELDING WIRE (MIG & TIG)
ER4046 (AlSi10Mg) is an aluminum-silicon-magnesium filler wire for welding cast aluminum and 6xxx wrought aluminum alloys.
Key Features: Moderate silicon content delivers excellent weld fluidity and superior crack resistance for restrained joints. Features better ductility than ER4047 for reliable cast aluminum welding. Caution: Visible color difference after anodizing; not suitable for 5xxx high-magnesium aluminum alloys.
Applicable Standards
AWS A5.10：ER4046（MIG）/ R4046（TIG）
EN ISO 18273：S Al 4046（AlSi10Mg）
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: 2.0/2.4/3.2/4.0/5.0 mm, 1m fixed length, packed in 5kg plastic tube and 5kg cardboard box.
Welding Polarity
-MIG (GMAW)：DCEP
-TIG (GTAW)：AC
Shielding Gas (MIG + TIG)
- Preferred shielding gas: 100% pure Ar. Ar+He mixture is available for thick plates requiring deep penetration.
-Flow rate: MIG 18–25 L/min, TIG 12–18 L/min.
Mechanical Properties of Deposited Metal
Tensile Strength: 180–220 MPa
Yield Strength: 80–110 MPa
Elongation (A5): 8%–13%
Melting Range: 570–610℃
Key Advantages
- Ideal matching wire for A356, ADC12 cast aluminum and 6061, 6063, 6082 Al-Mg-Si alloys
-Excellent weld fluidity and deep penetration, effectively prevents solidification cracking for high-restraint workpieces
-Higher ductility and lower brittleness compared with ER4047, suitable for various cast aluminum structures
-Stable arc, low spatter and smooth weld bead, ensuring beautiful welding forming
-Compatible with both MIG and TIG welding processes for versatile industrial use
Recommended Base Metals
✅ Recommended: A356, ADC12, ZL104 cast aluminum alloys; 6061, 6063, 6082 Al-Mg-Si alloys
✅ Dissimilar welding: Cast aluminum ↔ 6xxx wrought aluminum alloys
⚠️ Caution: Not recommended for high-toughness bearing structural parts
❌ Do not weld 5xxx high-magnesium aluminum alloys, which causes weld brittleness and reduced corrosion resistance
Applications
-Automotive die-casting parts, engine and gearbox aluminum housings
-Hydraulic valve bodies, water pump shells and mechanical cast aluminum components
-HVAC aluminum structures, aluminum molds and industrial equipment housings
-General industrial aluminum frames and pipeline structural parts
Common Welding Problem & Solutions
Weld Porosity
Cause: Insufficient oxide cleaning, wet shielding gas, wind interference.