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INCONEL ALLOY
Inconel alloy series
Inconel is a nickel-chromium-molybdenum alloy designed to resist a wide range of severely corrosive environments, pitting and crevice corrosion. This nickel steel alloy also displays exceptionally high yield, tensile, and creep-rupture properties at high temperatures. This nickel alloy is used from cryogenic temperatures up to long term service at 1200°F. One of the distinguishing features of Inconel 718's composition is the addition of niobium to permit age hardening which allows annealing and welding without spontaneous hardening during heating and cooling. The addition of niobium acts with the molybdenum to stiffen the alloy's matrix and provide high strength without a strengthening heat treatment.Other popular nickel-chromium alloys are age hardened through the addition of aluminum and titanium. This nickel steel alloy is readily fabricated and may be welded in either the annealed or precipitation (age) hardened condition. This superalloy is used in a variety of industries such as aerospace,chemical processing,marine engineering, pollution-control equipment, and nuclear reactors.
Product form
Pipe, plate, strip, round rods, flat rods, forgings, wire, special profiles, extrusions.
Chemical composition
| Alloy Name | % | Ni | Cr | Fe | Mo | Nb | P | C | Mn | Si | S | Cu | Al | Ti | Co | B |
| Alloy 718 | Min | 50 | 17 | Bal | 2.8 | 4.75 | - | - | - | - | - | - | 0.2 | 0.65 | - | - |
| Max | 55 | 21 | Bal | 3.3 | 5.50 | 0.015 | 0.08 | 0.35 | 0.35 | 0.015 | 0.3 | 0.8 | 1.15 | 1 | 0.006 |
Physical properities
| Melting Point | Density | Alloy and State | Tensile Strength | Yield Strength | Extensibility | Brinell Hardness |
| 1260-1340 ºC | 8.24 g/cm³ | RmN/ mm² | Rp0.2N/ mm | A5% | HB | |
| Solution Treatment | <965 | 550 | 30 | ≤363 | ||
| Solid Solution+Time Limit | ≥1275 | ≥1035 | ≥12 | ≥331 |
