ERNiCrMo-4 welding wire is a top-tier product engineered for Gas Metal Arc Welding (GMAW) and Gas Tungsten Arc Welding (GTAW) of high-performance nickel-chromium-molybdenum base materials, particularly Hastelloy C276. This wire adheres to the stringent standards set by the Chinese specification GB/T 15620 SNi6276 and international specifications including AWS A5.14, ERNiCrMo-4, ASME II, SFA-5.14, Werkstoff Nr. 2.4886, and UNS N10276. Designed to provide superior weld quality and reliability, ERNiCrMo-4 is the preferred choice for critical applications.

Applications

ERNiCrMo-4 is specifically developed for welding Hastelloy C276 and other nickel-chromium-molybdenum alloys to themselves. These materials are widely used in industries where resistance to corrosion and high temperatures is essential, such as chemical processing, petrochemical, and marine environments. The wire’s excellent performance makes it ideal for joining these alloys in both similar and dissimilar welding applications, ensuring robust and durable welds that can withstand the most challenging conditions.

Chemical Composition

The effectiveness of ERNiCrMo-4 in demanding applications is attributed to its meticulously balanced chemical composition, designed to enhance resistance to corrosion, oxidation, and thermal degradation. The main chemical components and their respective percentages are as follows:

Nickel (Ni): ≥50%

Carbon (C): ≤0.02%

Silicon (Si): ≤0.08%

Sulfur (S): ≤0.015%

Phosphorus (P): ≤0.02%

Manganese (Mn): ≤1.0%

Iron (Fe): 4.0-7.0%

Chromium (Cr): 14.5-16.5%

Molybdenum (Mo): 15-17%

Copper (Cu): ≤0.50%

Tungsten (W): 3.0-4.5%

Vanadium (V): ≤0.13%

This precise formulation ensures that ERNiCrMo-4 provides exceptional resistance to the harshest environments, making it the ideal choice for welding high-performance alloys where long-term reliability is critical.

Mechanical Properties

ERNiCrMo-4 welding wire is designed to deliver outstanding mechanical properties, especially in terms of tensile strength. With a minimum tensile strength of 100,000 psi (690 MPa), it ensures that the welded joints are exceptionally strong and capable of withstanding significant stress. This high level of performance is crucial for applications where the integrity of the weld must be maintained under extreme conditions.

Product Forms and Specifications

ERNiCrMo-4 is available in a variety of forms to suit different welding processes and preferences:

Straight Rods (TIG): Available in diameters ranging from 1.2mm to 3.2mm, these rods are ideal for Gas Tungsten Arc Welding (GTAW), offering precision and control in the welding process.

Spooled Wire (MIG): Offered in diameters from 0.8mm to 1.2mm, this spooled wire is designed for use in Gas Metal Arc Welding (GMAW), ensuring smooth and consistent feeding for optimal welding performance.

Both forms are meticulously manufactured with precision layer winding for the spooled wire, ensuring easy handling and minimal downtime during use.

Conclusion

ERNiCrMo-4 welding wire is a high-performance solution for welding nickel-chromium-molybdenum alloys, especially Hastelloy C276, in the most demanding environments. Its exceptional chemical composition, superior mechanical properties, and availability in various product forms make it the go-to choice for industries requiring reliable and durable welds. Whether in chemical processing, petrochemical, or marine applications, ERNiCrMo-4 ensures that your welding operations meet the highest standards of quality and performance.