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Nickel alloys are metals created by combining nickel with another material as the primary element. It combines two materials to produce more desirable properties like increased strength and corrosion resistance. It's used in a wide range of equipment across multiple industries due to its distinct properties. Apex Metal India is a leading supplier and stockiest of nickel in all grades.
Inconel 718 is a high strength, corrosion resistant nickel chromium alloy, initially developed for the aerospace industry and still considered the material of choice for the majority of aircraft engine components. Its excellent strength and corrosion resistance have been recognised by the oil industry and it is now widely used in this field.
Alloy 718 is hardened by the precipitation of secondary nickel- (aluminium, titanium, niobium) phases giving the alloy a combination of high strength and good corrosion resistance.
Chemical Composition of Alloy 718 for Aerospace:
| C | Mn | Si | P | S | Cr | Ni | Mo | Nb + Ta | Ti | Ai | Co | B | Cu | Fe | - | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | - | - | - | - | - | 17.0 | 50.0 | 2.80 | 4.75 | 0.65 | 0.20 | - | - | - | Bal | % |
| Max | 0.08 | 0.35 | 0.35 | 0.015 | 0.015 | 21.0 | 55.0 | 3.30 | 5.50 | 1.15 | 0.80 | 1.0 | 0.006 | 0.30 | - | % |
| Type | Tensile (PSI (MPA)) | Yield (0.2% offset), (PSI (MPA) Min) | Elongation in 2" or 4D min% | Reduction of Area | Hardness | Charpy Impacts at - 60◦C (-76◦F) J (ft.lb) |
|---|---|---|---|---|---|---|
| API 6ACRA Oil Patch | 150,000 (1034) | 120,000 (827) | 20 | 35 | 40 HRC Max |
76.2mm dia: 61J
(45) min/68J(50)
Average 76.2mm to 254mm dia: 41J(30) min/ 47J (35) average >254mm dia: 37J (27) min/41J (30) average |
| High Strength/ AMS Aerospace | 185,000 (1275) | 150,000 (1034) | 12 | 15 | 331HB Min |
Typical applications in the oil industry and aerospace and power generation industries.