ERNiCu-7 Welding Wire (SNi4060 / Monel 400) – Nickel-Copper Alloy MIG/TIG Filler Metal
Product Description
ERNiCu-7 (AWS A5.14) welding wire is a solid solution nickel-copper alloy filler metal designed for welding Monel 400 and other similar Ni-Cu alloys. It provides excellent corrosion resistance in seawater, brine, salt, and acidic environments, making it ideal for marine, chemical, and food processing industries.
The wire is widely used for TIG (GTAW) and MIG (GMAW) welding processes. Its stable arc, low spatter, and ease of use make it a preferred choice for both fabrication and maintenance welding in harsh conditions.
SNi4060 is the corresponding Chinese designation for ERNiCu-7, compliant with GB/T standards.
Common Names / Designations
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AWS Specification: ERNiCu-7
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Chinese Designation: SNi4060
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UNS Number: N04400 (related base metal)
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Trade Names: Monel 400 Welding Wire, Alloy 400 Filler Wire
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Other Aliases: Nickel-Copper Welding Wire, NiCu Welding Wire
Key Features
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High corrosion resistance to seawater, acids, alkalis, and brine
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Excellent resistance to pitting and stress corrosion cracking
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Suitable for dissimilar welding between Ni-Cu and carbon or low alloy steels
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Good arc stability and weld bead appearance
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Ideal for both fabrication and repair welding
Typical Applications
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Marine structures and shipbuilding
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Offshore oil & gas pipelines
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Heat exchangers and condensers
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Pump shafts, valves, and seawater equipment
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Food processing and chemical handling systems
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Dissimilar metal joints (Monel to steel)
Chemical Composition (% Typical)
| Element | Content (%) |
|---|---|
| Nickel (Ni) | 62.0 – 69.0 |
| Copper (Cu) | 29.0 – 33.0 |
| Iron (Fe) | ≤2.5 |
| Manganese (Mn) | ≤2.5 |
| Carbon (C) | ≤0.15 |
| Silicon (Si) | ≤1.25 |
| Sulfur (S) | ≤0.015 |
Mechanical Properties (Typical)
| Property | Value |
|---|---|
| Tensile Strength | ≥550 MPa |
| Yield Strength | ≥240 MPa |
| Elongation | ≥30% |
| Hardness (HB) | ~140–180 |
| Operating Temperature | Up to ~500°C |
Available Specifications
| Item | Detail |
|---|---|
| Wire Diameter | 0.8 mm, 1.0 mm, 1.2 mm, 1.6 mm, 2.4 mm, 3.2 mm (customizable) |
| Welding Process | TIG (GTAW), MIG (GMAW) |
| Spool Packaging | 5kg / 10kg / 15kg / 20kg |
| Surface Finish | Bright, Cleaned, Anti-rust Coated |
| OEM Service | Private label, barcode, customized packaging |
Note
Also available: Monel K500, Inconel 625, Hastelloy C276, and other nickel alloy wires. Free samples and technical support can be provided upon request.
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.