Composition

• Nickel (Ni): Approximately 70%
• Chromium (Cr): 14% - 17%
• Iron (Fe): 5% - 9%
• Titanium (Ti): 2.25% - 2.75%
• Niobium (Nb): 0.7% - 1.2%
• Plus traces of aluminum, manganese, silicon, carbon, and copper.

Physical Properties

• Density: About 8.28 g/cm³
• Melting Point: 1393°C - 1427°C (2540°F - 2600°F)

Mechanical Properties

• Tensile Strength: Typically in the range of 910 MPa to 1,380 MPa, depending on the form and treatment.
• Yield Strength: Varies, but typically around 655 MPa for heat treated conditions.
• Elongation: Around 20% to 30%, depending on heat treatment and working conditions.

Features

• High-Temperature Strength: Maintains good strength at temperatures up to 704°C (1300°F).
• Corrosion Resistance: Good resistance to a wide spectrum of corrosive environments.
• Oxidation Resistance: Excellent resistance up to 982°C (1800°F).
• Creep Resistance: Excellent resistance to creep and stress-rupture at high temperatures.

Specifications and Standards

• AMS 5667, 5668, 5670, 5671, and 5747: Covering various forms like bars, forgings, and rings.
• ASTM B637: Specifications for nickel-alloy (UNS N07750) rod, bar, and wire.

Applications

• Aerospace Industry: Mainly used in turbine components, including blades, rotors, and others, where high-temperature capacity is essential.
• Nuclear Reactors: Components exposed to high neutron flux.
• Heat-Treating Industry: Used in fixtures, furnace parts, and for heat-treating baskets.