Nickel Alloys Alloy 718 & 718 SPF (2.4668)
Definition:
Alloy 718 is a nickel-based superalloy containing nickel, chromium, molybdenum, titanium and niobium.
Density: 8.19 g/cm³
Melting range: 1260-1336°C
Specific heat capacity: 435 J/kg(°C)
Curie temperature: -112°C
Magnetic permeability at 200 Oersted (15.9 kA/m): 1.0011
Coefficient of thermal expansion: 13.0 (21 - 93°C µm/m-°C)
Thermal conductivity: 11.4 W/m(°C)
Resistivity: 1.25 mm²/m
Chemical composition analysis:
Nickel (Ni): 50.0-55.0%
Chromium (Cr): 17.0-21.0%
Iron (Fe): Balance
Niobium (Nb): 4.75-5.50%
Molybdenum (Mo): 2.80-3.30%
Titanium (Ti): 0.65-1.15%
Aluminum (Al): 0.20-0.80%
Cobalt (Co): 0.08% max.
Carbon (C): 0.35% max.
Manganese (Mn): 0.35% max.
Silicon (Si): 0.35% max.
Phosphorus (P): 0.015% max.
Sulfur (S): 0.015% max.
Boron (B): 0.006% max.
Copper (Cu): 0.30% max.
Mechanical properties (annealing):
Creep strength (1000 hours): 110 ksi (760 MPa), 86 ksi (590 MPa) at 650°C, 53 ksi (370 MPa) at 705°C, 24 ksi (170 MPa) at 760°C
Application:
Alloy 718 is a nickel-based super alloy widely used in aerospace, chemical, energy and other industries.
Due to its excellent corrosion resistance and high strength, Alloy 718 is used to manufacture aircraft parts, chemical equipment, marine engineering parts, nuclear reactor parts, rocket engine parts, high-pressure vessels, heat exchangers, etc.
Particularly suitable for parts in contact with chemicals, marine engineering, nuclear reactor parts, rocket engine parts, special tanks, valves, connectors and turbine parts.
Alloy 718 & 718 SPF (2.4668) nickel-iron-chromium alloys containing niobium and molybdenum have excellent mechanical properties at lower temperatures and excellent corrosion resistance at high and low temperatures. Alloy 718 & 718 SPF (2.4668) occupy an important position in the field of high-performance applications due to its excellent comprehensive properties.
