Introduction

ERNiCr-3 is a high-performance nickel-chromium alloy welding wire widely used in various industrial applications, including Gas Tungsten Arc Welding (GTAW), Gas Metal Arc Welding (GMAW), and Submerged Arc Welding (SAW). 

It is designed for welding Inconel 600, Inconel 601, Inconel 690, Incoloy 800, and Incoloy 800HT, making it an essential material for high-temperature and corrosion-resistant applications. 

Additionally, it is utilized in dissimilar metal welding, joining Inconel, Incoloy, and Incoloy 330 to nickel, Monel alloys, stainless steels, and carbon steels.

Chemical Composition Optimization 

To ensure superior welding performance and mechanical properties, ERNiCr-3 has been formulated with the following chemical composition:

Nickel (Ni): ≥67% - Enhances corrosion and oxidation resistance.

Chromium (Cr): 18–22% - Improves oxidation resistance and high-temperature stability.

Iron (Fe): ≤3.0% - Maintains structural integrity.

Niobium (Nb): 2.0–3.0% - Strengthens weld joints and enhances creep resistance.

Titanium (Ti): ≤0.75% - Prevents carbide precipitation.

Carbon (C): ≤0.05% - Reduces intergranular corrosion.

Manganese (Mn): 2.5–3.5% - Improves toughness and workability.

Silicon (Si): ≤0.5% - Enhances oxidation resistance.

Sulfur (S): ≤0.015% - Minimizes hot cracking susceptibility.

Phosphorus (P): ≤0.015% - Reduces embrittlement risk.

Copper (Cu): ≤0.50% - Enhances corrosion resistance in acidic environments.

Mechanical Properties Enhancement

To meet stringent industrial requirements, ERNiCr-3 exhibits the following optimized mechanical properties:

Tensile Strength: 80,000 Psi (552 MPa) - Provides excellent durability under high stress.

Elongation: ≥30% - Ensures flexibility and resistance to cracking.

Product Form Availability & Application Advantages

ERNiCr-3 is available in various forms to accommodate diverse welding needs:

Precision Layer Wound Spools - Ensures consistent wire feeding for automated and semi-automated welding processes.

Cut Straight Lengths - Suitable for manual welding applications, providing precision and ease of use.

Straight Rods (TIG) Sizes: 1.2–3.2 mm - Ideal for GTAW applications requiring controlled heat input.

Spooled Wire (MIG) Sizes: 0.8–1.2 mm - Facilitates high-speed welding with excellent arc stability.

Conclusion

ERNiCr-3 welding wire is a high-performance solution tailored for industries requiring superior high-temperature strength, oxidation resistance, and corrosion resistance. 

Through precise chemical composition optimization and mechanical enhancement, it provides exceptional weldability and long-term performance in challenging environments. 

Its diverse product forms ensure compatibility with different welding techniques, making it an ideal choice for critical applications in aerospace, power generation, and chemical processing industries.