Monel 400 Filler Wire
Monel 400 filler wire is a welding consumable made from Monel 400 alloy (UNS N04400)-a nickel-copper solid-solution alloy designed for excellent corrosion resistance and good weldability, especially in marine, chemical, and acidic environments.
🔧 Monel 400 Filler Wire – Overview
| Property | Details |
|---|---|
| Material | Monel 400 (UNS N04400 / Werkstoff Nr. 2.4360) |
| Form | Filler wire / Welding wire |
| Standards | AWS A5.14 ERNiCu-7 / ASME SFA-5.14 |
| Composition | ~63% Ni, ~28-34% Cu, with small amounts of Fe, Mn, Si, and C |
| Size Range | Typically 0.8 mm – 3.2 mm (0.030" – 1/8") |
| Packaging | Spools, coils, or cut lengths |
🧪 Key Characteristics
Excellent corrosion resistance, particularly in:
Seawater
Brine
Hydrofluoric and sulfuric acids
Good weldability using GTAW (TIG) or GMAW (MIG) processes
Low risk of cracking due to its solid-solution structure
Can be used for joining Monel 400 to itself or to other nickel-copper alloys
🔩 Typical Applications
Welding of Monel 400 pipes, plates, flanges, fittings
Repair and fabrication in marine, oil & gas, chemical processing
Heat exchangers, condenser tubing, pump and valve housings
📋 Equivalent Grades / Designations
| Standard | Filler Wire Name |
|---|---|
| AWS/ASME | ERNiCu-7 |
| UNS | N04007 |
| ISO | NiCu7 |
| DIN | SG-NiCu30Fe / W.Nr. 2.4366 |
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