Inconel 718 is a nickel-based precipitation-hardening alloy designed for very high yield strength, tensile strength and creep rupture properties at temperatures up to 1300ºF (705ºC.) The alloy has excellent weldability.
Nickel: 50~55
Chromium Cr: 17-21
Iron Fe: surplus
Carbon C: 0.08
Manganese MN: 0.35
Silicon Si: 0.35
Molybdenum Mo: 2.8~3.3
Copper Cu: 0.3
Cobalt Co: 1.0
Aluminum Al: 0.2~0.8
Titanium Ti: 0.65-1.15
Nb: 4.75~5.50
Boron B: 0.006
Phosphorus P: 0.01
Sulfur S: 0.01
Physical Property
Density: 8.24 g/cm3
Melting point: 1260-1320 ℃
Mechanical Property
Tensile strength RmN/mm2:965
Yield strength Rp0.2N/mm2:550
Elongation rate A5%: 30
Brinell hardness HB: ≥ 363
The alloy is used in jet engine and high-speed airframe parts such as wheels, buckets and spacers, and high-temperature bolts and fasteners. Inconel 718 is also used in the oil and gas drilling and production industries due to its high strength and resistance to chlorides, stress corrosion and sulfide stress cracking. Within these industries the alloy has been used for valves, pump shafts and wellhead components.
Inconel 718 is a nickel-based precipitation-hardening alloy designed for very high yield strength, tensile strength and creep rupture properties at temperatures up to 1300ºF (705ºC.) The alloy has excellent weldability.
Nickel: 50~55
Chromium Cr: 17-21
Iron Fe: surplus
Carbon C: 0.08
Manganese MN: 0.35
Silicon Si: 0.35
Molybdenum Mo: 2.8~3.3
Copper Cu: 0.3
Cobalt Co: 1.0
Aluminum Al: 0.2~0.8
Titanium Ti: 0.65-1.15
Nb: 4.75~5.50
Boron B: 0.006
Phosphorus P: 0.01
Sulfur S: 0.01
Physical Property
Density: 8.24 g/cm3
Melting point: 1260-1320 ℃
Mechanical Property
Tensile strength RmN/mm2:965
Yield strength Rp0.2N/mm2:550
Elongation rate A5%: 30
Brinell hardness HB: ≥ 363
The alloy is used in jet engine and high-speed airframe parts such as wheels, buckets and spacers, and high-temperature bolts and fasteners. Inconel 718 is also used in the oil and gas drilling and production industries due to its high strength and resistance to chlorides, stress corrosion and sulfide stress cracking. Within these industries the alloy has been used for valves, pump shafts and wellhead components.
