Introduction
ERNi-1 is a nickel alloy bare welding wire designed primarily for joining Nickel 200 (UNS N02200)and Nickel 201 (UNS N02201), including ASTM grades such as B160, B725, and B730. This alloy is also highly effective for welding dissimilar metals, including nickel alloys to stainless steels or ferritic steels, making it a versatile choice for various industrial applications. Additionally, ERNi-1 is used for overlaying carbon steel and repairing cast iron castings, ensuring strong, corrosion-resistant joints.
Key Features & Applications
Excellent Weldability
Produces high-quality, crack-free welds with good mechanical properties.
Suitable for TIG (GTAW) and MIG (GMAW)welding processes.
Dissimilar Metal Welding
Ideal for joining nickel alloys to stainless steel or carbon steel, reducing galvanic corrosion risks.
Overlay & Repair Applications
Used for hardfacing carbon steel and repairing cast iron components in industrial machinery.
Corrosion Resistance
Maintains the high corrosion resistance of nickel-based alloys in harsh environments.
Chemical Composition (%)
The composition of ERNi-1 ensures optimal welding performance:
Element | Max (%) |
Ni + Co | ≥ 93 |
Si | ≤ 0.75 |
C | ≤ 0.15 |
Al | ≤ 1.5 |
Mn | ≤ 1.0 |
Ti | 2.0–3.5 |
Fe | ≤ 1.0 |
P | ≤ 0.03 |
S | ≤ 0.015 |
Cu | ≤ 0.25 |
Others | ≤ 0.50 |
The high nickel content ensures compatibility with pure nickel and nickel alloys, while controlled levels of titanium (Ti)and aluminum (Al) enhance weld strength and crack resistance.
Mechanical Properties
Property | Value |
Tensile Strength | ≥ 60,000 psi (414 MPa) |
Elongation | ≥ 20% |
These properties ensure strong, ductile welds capable of withstanding mechanical stress and thermal cycling.
Available Product Forms
ERNi-1 is supplied in:
Spooled Wire (MIG/GMAW):0.8–1.2 mm diameter
Straight Lengths (TIG/GTAW):1.2–3.2 mm diameter
The precision-wound spools ensure smooth feeding in automated welding processes.
Conclusion
ERNi-1 nickel alloy bare wire is a reliable, high-performance filler metal for welding pure nickel, dissimilar metals, and repair applications. Its excellent weldability, corrosion resistance, and mechanical strength make it a preferred choice in chemical processing, power generation, and heavy industry.
For optimal results, proper welding techniques and shielding gases (such as argon or helium for TIG) should be used to prevent contamination and ensure high-quality welds.