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Incoloy 800 is a nickel-iron-chromium superalloy designed for high-temperature and corrosive environments. It belongs to the family of "Incoloy" alloys and is standardized under UNS N08800. Incoloy 800 has good strength and excellent resistance to oxidation and carburization in high-temperature atmospheres. Alloy 800 has excellent resistance to stress corrosion cracking in chloride and high-temperature and high-pressure water, so it is used to manufacture stress corrosion cracking resistance equipment.
Excellent Oxidation Resistance: Performs exceptionally well in continuous service up to about 1100°F (593°C) and intermittently up to 1800°F (982°C) in air. Forms a protective chromium oxide scale.
Good Carburization and Nitridation Resistance: Resists attack in carburizing and nitriding furnace atmospheres better than many stainless steels.
Good Sulfidation Resistance: Resists sulfur-bearing atmospheres like refinery environments.
High-Temperature Strength: Maintains good mechanical strength and creep resistance at elevated temperatures.
Corrosion Resistance: Resists corrosion by
Aqueous corrosion.
Chloride stress corrosion cracking—significantly better than 300-series stainless steels.
Nitric acid, phosphoric acid, and organic acids.
Alkaline solutions.
Steam and steam/hydrocarbon mixtures.
Good Fabricability: It can be readily formed, machined, and welded using matching filler metals such as Inconel 82/182/625 and standard techniques like GTAW, GMAW, and SMAW.
Grade | Ni | Cr | Fe≥ | Al | C≤ | Mn≤ | Si≤ | S≤ | Cu≤ | P≤ | Al |
Incoloy 800 | 30.0-35.0 | 19.0-23.0 | 39.5 | 0.15-0.60 | 0.10 | 1.50 | 1.00 | 0.015 | 0.75 | 0.045 | 0.15-0.6 |
Density | Melting Range | Specific Heat | Electrical Resistivity | ||
7.94g/cm3 | 1357-1385°C | 2475-2525°F | 460J/kg. k | 0.11Btu/lb.°F | 989µΩ·m |
Tensile Strength, min. | Yield Strength, min. | Elongation,min. | ||
520Mpa | 75ksi | 205Mpa | 30ksi | 30% |
STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN | OR |
Incoloy 800 | 1.4876 | N08800 | NCF 800 | NA 15 | ЭИ670 | Z8NC32-21 | X10NiCrAlTi32-20 | XH32T |
Product | Standard | Show |
Incoloy 800 bars | ASTM B408, EN 10095 |  |
Incoloy 800 sheet plate | ASTM A240, A480, ASTM B409, B906 |  |
Incoloy 800 seamless pipe | ASTM B829, B407 |  |
Incoloy 800 welded pipe | ASTM B514, B515, B751, B775 |  |
Incoloy 800 welded fittings | ASTM B366 |  |
Incoloy 800 forgings | ASTM B564, DIN 17460 |  |
Chemical industry.
Nuclear generator.
Nitric acid cooler, acetic anhydride cracking tube.
Heat exchange equipment, heat exchange tubes.
