1. Basic Overview
Precipitation-hardened nickel-chromium-iron alloy with high strength, excellent fatigue and creep resistance up to 704°C, and good corrosion resistance.
2. Chemical Composition (wt%, typical)
Element Composition Ni 50.0–55.0 Cr 17.0–21.0 Fe Balance Mo 2.8–3.3 Nb + Ta 5.0–5.5 Ti 0.6–1.1 Al 0.2–0.8 C ≤0.08
3. Mechanical Properties (Solution Annealed + Aged)
Property Value Tensile Strength ≥ 1275 MPa Yield Strength ≥ 1035 MPa Elongation ≥ 12 % Density 8.19 g/cm³ Melting Range 1260 – 1340 °C
Key Features
High tensile, fatigue and creep strength up to 704°C
Excellent corrosion and oxidation resistance
Good weldability and fabricability
Widely used in high-temperature structural applications
Typical Applications
Aerospace gas turbine components (discs, blades, casings)
Rocket and jet engine parts
High-temperature fasteners, shafts, springs
Oil & gas downhole tools and instrumentation
Chemical processing equipment