About Alloy
Incoloy 901 UNS N0990 (1.4662) is a nickel-chromium-iron alloy known for its exceptional resistance to corrosion, pitting, and crevice attack in high-temperature, high-pressure environments. This specialized alloy is part of the broader Incoloy family, offering unique properties compared to other variants like Incoloy 800H, 800HT, and 825.
The composition of Incoloy 901 typically consists of around 50% nickel, 22% chromium, and 21% iron, with additions of molybdenum and copper to enhance its corrosion-resistant qualities. This carefully balanced blend of elements gives the alloy an exceptionally high resistance to degradation in harsh, high-temperature conditions, such as acidic or alkaline solutions.
One of the key advantages of Incoloy 901 is its ability to withstand temperatures up to 900°C (1650°F) without compromising its strength or structural integrity. This makes it an ideal choice for applications requiring prolonged exposure to extreme heat, like heat exchangers, boilers, and other high-temperature equipment used in power generation and chemical processing.
In addition to its thermal resilience, Incoloy 901 also boasts excellent weldability, allowing for reliable fabrication and assembly in a variety of industrial settings. This includes use in the aerospace industry, marine engineering, and the manufacture of specialized valves, pumps, and other high-performance components.
Overall, Incoloy 901's unique combination of corrosion resistance, high-temperature strength, and fabrication capabilities make it a valuable material for demanding applications where durability and performance are paramount.
Product Form
Bar & Forging: AMS 5660
Bars & Forgings & Flash-welded rings: AMS 5661
Chemical Composition
| Element | Content (%) |
| Nickel, Ni | 40-45 |
| Iron, Fe | 33 |
| Chromium, Cr | 11-14 |
| Molybdenum, Mo | 5.0 - 6.50 |
| Titanium, Ti | 2.80-3.10 |
| Cobalt, Co | 1 |
| Manganese, Mn | 0.50 |
| Copper, Cu | 0.50 |
| Silicon, Si | 0.40 |
| Aluminum, Al | 0.35 |
| Carbon, C | 0.10 |
| Sulfur, S | 0.030 |
Property
| Properties | Metric | Imperial |
| Tensile strength (precipitation hardened, value at room temperature) | 1200 MPa | 174000 psi |
| Yield strength (@strain 0.200%, precipitation hardened, value at room temperature) | 875 MPa | 127000 psi |
| Elongation at break (precipitation hardened) | 15% | 15% |
Application
Power Generation: Inconel 901 is used in the power generation industry, particularly in high-temperature environments, such as heat exchangers, boilers, and other high-temperature equipment.
Chemical Processing: The alloy's resistance to corrosion and high-temperature strength makes it a suitable material for handling strong acids and other corrosive materials commonly found in chemical processing plants.
Oil and Gas: Inconel 901 is used in the oil and gas industry, particularly in offshore drilling platforms and pipelines, where resistance to chloride ions and high-temperature strength is essential.
Aerospace: Inconel 901 is used in the aerospace industry due to its high-temperature strength and resistance to corrosion, making it suitable for manufacturing various components like valves and pumps.
Marine Engineering: The alloy's excellent resistance to seawater corrosion makes it an ideal material for marine engineering applications, particularly in the construction of ships, propellers, shafts, and other underwater structures.
Nuclear Industry: Inconel 901 is radiation-resistant and can withstand high levels of neutron exposure, making it an ideal material for reactor components, fuel cladding, and other components in nuclear power plants.
Desalination Plants: Inconel 901 is used in desalination plants due to its resistance to the harsh conditions of seawater and the chemicals used in the desalination process.
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