ERNiCrMo-4 Welding Wire (Inconel 686 / UNS N06686 / Nickel Alloy) – High-Performance Corrosion-Resistant Filler Metal for Critical Applications
Product Description
ERNiCrMo-4 is a premium nickel-chromium-molybdenum-tungsten (NiCrMoW) alloy welding wire designed for the most demanding corrosion environments. Equivalent to Inconel® 686 (UNS N06686), this wire delivers exceptional resistance to a wide range of corrosive media including strong oxidizers, acids (sulfuric, hydrochloric, nitric), seawater, and high-temperature gases.
Ideal for both cladding and joining, ERNiCrMo-4 is widely used in chemical processing, flue gas desulfurization (FGD) systems, marine engineering, and pollution control equipment. Compatible with TIG (GTAW) and MIG (GMAW) welding processes, it provides crack-free, durable welds with excellent mechanical and corrosion-resistant performance.
Key Features
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Outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking
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Performs in aggressive oxidizing and reducing environments including wet chlorine, hot acids, and seawater
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High-temperature strength and structural stability up to 1000°C
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Excellent weldability and arc stability in both MIG and TIG processes
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Suitable for overlay welding on carbon or stainless steel components
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Conforms to AWS A5.14 ERNiCrMo-4 / UNS N06686
Common Names / Designations
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AWS: ERNiCrMo-4
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UNS: N06686
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Equivalent: Inconel® 686, Alloy 686, NiCrMoW
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Other Names: Alloy 686 welding wire, high-performance nickel alloy filler, corrosion-resistant overlay wire
Typical Applications
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Chemical reactors and pressure vessels
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Flue gas desulfurization (FGD) systems
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Seawater piping, pumps, and valves
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Marine exhaust and pollution control equipment
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Dissimilar metal welding and protective cladding
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Heat exchangers in aggressive chemical media
Chemical Composition (% Typical)
| Element | Content (%) |
|---|---|
| Nickel (Ni) | Balance (min. 59%) |
| Chromium (Cr) | 19.0 – 23.0 |
| Molybdenum (Mo) | 15.0 – 17.0 |
| Tungsten (W) | 3.0 – 4.5 |
| Iron (Fe) | ≤ 5.0 |
| Cobalt (Co) | ≤ 2.5 |
| Manganese (Mn) | ≤ 1.0 |
| Carbon (C) | ≤ 0.02 |
| Silicon (Si) | ≤ 0.08 |
Mechanical Properties (As-Welded)
| Property | Value |
|---|---|
| Tensile Strength | ≥ 760 MPa |
| Yield Strength | ≥ 400 MPa |
| Elongation | ≥ 30% |
| Operating Temperature | Up to 1000°C |
| Corrosion Resistance | Outstanding |
Available Specifications
| Item | Detail |
|---|---|
| Diameter Range | 1.0 mm – 4.0 mm (Typical sizes: 1.2 mm / 2.4 mm / 3.2 mm) |
| Welding Process | TIG (GTAW), MIG (GMAW) |
| Packaging | 5kg / 15kg precision spools or straight-cut rods (1m standard) |
| Surface Condition | Bright, clean, rust-free |
| OEM Services | Labeling, packaging, barcode, and customization available |
Related Alloys
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ERNiCrMo-3 (Inconel 625)
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ERNiCrMo-10 (C22)
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ERNiMo-3 (Alloy B2)
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ERNiFeCr-2 (Inconel 718)
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ERNiCrCoMo-1 (Inconel 617)
