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Inconel 718
Inconel 718 Alloy comprises of a nickel fractions up to 55% alloyed with chromium up to 21% along with other minor elements.
Inconel 718 Alloy properties include high strength, excellent corrosion resistance and a working temperature between -250oC and 650oC (-418oF to 1200oF).
It is also age-hardenable. It’s excellent welding characteristics and resistance to cracking makes it an ideal material for additive machining.
Properties: Applications:
Retains strength up to 650oC Aerospace and defense
High creep resistance Gas turbine blades
High corrosion resistance Exhaust manifolds
Solidification properties suited to additive manufacture Rocket motors
Heat exchangers
Nuclear applications
Powder Composition (AMS 5596, AMS 5662, ASTM B637):
Nickel 50-55% Cobalt ≤ 1.0%
Chromium 17-21% Copper ≤ 0.30%
Niobium 4.75-5.50% Manganese ≤ 0.35%
Molybdenum 2.80-3.30% Silicon ≤ 0.35%
Aluminum 0.20-0.80% Magnesium ≤ 0.01%
Titanium 0.65-1.15% Carbon ≤ 0.08%
Iron Balance Boron ≤ 0.006%
Sulfur ≤ 0.0015%
Phosphorus ≤ 0.0015%
Properties (Wrought Material):
Density: 8.19 gram/cm3
Melting Point range: 1260 – 1336oC
Thermal Conductivity: 6 - 12 W/mK
Coefficient of Thermal Expansion: 12 – 16 μm/mK (0 – 100oC)
Mechanical Properties of Additive Manufactured components:
Tensile Strength (horizontal direction (XY)) 1060 MPa (+/- 50 MPa)
Tensile Strength (vertical direction (Z)) 980 MPa (+/- 50 MPa)
Yield Strength (horizontal direction (XY)) 780 MPa (+/- 50 MPa)
Yield Strength (vertical direction (Z)) 634 MPa (+/- 50 MPa)
Elongation (at break) (horizontal direction (XY)) 27% (+/- 5%)
Elongation (at break) (vertical direction (Z)) 31% (+/- 5%)
Modulus of Elasticity (horizontal direction (XY)) 160 GPa (+/- 2 GPa)
Modulus of Elasticity (vertical direction (Z)) 160 GPa (+/- 2 GPa)
Hardness (HRC) 30