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

• Outstanding resistance to pitting, crevice corrosion, and stress corrosion cracking

• Performs in aggressive oxidizing and reducing environments including wet chlorine, hot acids, and seawater

• High-temperature strength and structural stability up to 1000°C

• Excellent weldability and arc stability in both MIG and TIG processes

• Suitable for overlay welding on carbon or stainless steel components

• Conforms to AWS A5.14 ERNiCrMo-4 / UNS N06686

Common Names / Designations

• AWS: ERNiCrMo-4

• UNS: N06686

• Equivalent: Inconel 686, Alloy 686, NiCrMoW

• Other Names: Alloy 686 welding wire, high-performance nickel alloy filler, corrosion-resistant overlay wire

Typical Applications

• Chemical reactors and pressure vessels

• Flue gas desulfurization (FGD) systems

• Seawater piping, pumps, and valves

• Marine exhaust and pollution control equipment

• Dissimilar metal welding and protective cladding

• Heat exchangers in aggressive chemical media

Chemical Composition (% Typical)

Mechanical Properties (As-Welded)

Available Specifications

Related Alloys

• ERNiCrMo-3 (Inconel 625)

• ERNiCrMo-10 (C22)

• ERNiMo-3 (Alloy B2)

• ERNiFeCr-2 (Inconel 718)

• ERNiCrCoMo-1 (Inconel 617)