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Inconel 718 Superalloy Forgings

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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.

INconel718 alloy Chemical composition:

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 ℃

Inconel 718 alloy properties

Mechanical Property

Tensile strength RmN/mm2:965

Yield strength Rp0.2N/mm2:550

Elongation rate A5%: 30

Brinell hardness HB: ≥ 363

Applications of Inconel 718 forgings

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.

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