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Material Notes:
Nickel content above includes cobalt. Iron content as remainder. Developed in the early 1960's, IN718 is still considered the material of choice for the majority of aircraft engine components with service temperatures below 1200°F (650°C). Inconel 718 is a precipitation-hardenable nickel-chromium alloy containing also significant amounts of iron, niobium, and molybdenum along with lesser amounts of aluminum and titanium. It combines corrosion resistance and high strength with outstanding weldability including resistance to postweld cracking. The alloy has excellent creep-rupture strength at temperatures to 1300°F (700°C).
Nickel content above includes cobalt. Iron content as remainder. Developed in the early 1960's, IN718 is still considered the material of choice for the majority of aircraft engine components with service temperatures below 1200°F (650°C). Inconel 718 is a precipitation-hardenable nickel-chromium alloy containing also significant amounts of iron, niobium, and molybdenum along with lesser amounts of aluminum and titanium. It combines corrosion resistance and high strength with outstanding weldability including resistance to postweld cracking. The alloy has excellent creep-rupture strength at temperatures to 1300°F (700°C).
Applications: Aerospace, gas turbines, rocket motors, spacecraft, space shuttles, nuclear reactors, pumps, turbo pump seals, and tooling.
Forms: round, flat, extruded section, pipe, tube, forging stock, plate, sheet, strip and wire.
Data provided by the manufacturer, Special Metals.
MicroGroup's inventory of small diameter 304 and 316 and other stainless steel, nickel based alloys, and titanium alloys exceeds 5 million feet. Redraw of material to specific sizes and shapes, as well as secondary operations to convert tubing into components and assemblies.
| Physical Properties | Metric | English | Comments | |
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| Density | 8.19 g/cc | 0.296 lb/in³ | ||
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Mechanical Properties |
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| Tensile Strength, Ultimate | 1375 MPa | 199000 psi | Precipitation Hardened. Value at room temperature. Value at 650°C is 1100 MPa. | |
| Tensile Strength, Yield | 1100 MPa | 160000 psi | Precipitation Hardened. Value at room temperature; 0.2% offset. Value at 650°C is 980 MPa. | |
| Elongation at Break | 25 % | 25 % | Precipitation Hardened. Value at room temperature. Value at 650°C is 18%. | |
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Electrical Properties |
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| Electrical Resistivity | 0.000125 ohm-cm | 0.000125 ohm-cm | ||
| Magnetic Permeability | 1.0011 | 1.0011 | at 200 oersted (15.9 kA/m) | |
| Curie Temperature | -112 °C | -170 °F | ||
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Thermal Properties |
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| CTE, linear 20°C | 13 µm/m-°C | 7.22 µin/in-°F | 20-100°C | |
| Heat Capacity | 0.435 J/g-°C | 0.104 BTU/lb-°F | ||
| Thermal Conductivity | 11.4 W/m-K | 79.1 BTU-in/hr-ft²-°F | ||
| Melting Point | 1260 - 1336 °C | 2300 - 2440 °F | ||
| Solidus | 1260 °C | 2300 °F | ||
| Liquidus | 1336 °C | 2440 °F | ||