Neptune MIG Wire – .035" Cast Aluminum Repairs - DCEP Polarity - 1lb Spool

Neptune MIG Wire – .035" Aluminum Welding Wire - DCEP Polarity - 1lb Spool

Precision aluminum MIG welding made easy.

Neptune MIG wire (.035" diameter) is engineered for high-strength, porosity-free aluminum welds across a wide range of structural and cast aluminum applications. With exceptional arc stability, clean flow characteristics, and excellent color match, Neptune MIG is ideal for truck bodies, marine fabrication, frames, doors, and more.

This wire provides 40,000 psi tensile strength with 27% elongation, and is suitable for use on aluminum sheets, extrusions, pipe, and castings. For optimal results, proper surface prep and gas selection are essential.

Key Features

• Diameter: .035" (0.9mm)
• Voltage: 20–24 volts
• Amperage: 180–200 amps
• Gas flow: 40 ft³/hr
• Tensile strength: 40,000 psi
• Ductility: 27% elongation
• Excellent anodizing and color match
• Compatible with a wide range of aluminum alloys
• DCEP (reverse polarity) only
• Available in 1 lb, 5 lb, and 16 lb spool sizes

Best Practices

• Use only on pre-cleaned aluminum
• Clean weld area with a stainless steel brush
• Preheat to 400°F–600°F (204°C–315°C) for sections over 1/4"
• Recommended: Gemini Anti-Spatter Spray to protect MIG nozzles and contact tips
• Shielding gas options:
• 100% Argon
• 50% Argon / 50% Helium
• 75% Argon / 25% Helium

Applications

• Truck frames and cargo bodies
• Ship and marine structures
• Window and door frame fabrication
• Mold and furniture manufacturing
• Aluminum structural welding without post heat treatment