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Grade | Ni | Cr | Fe | C | Mn | Si | S | Al | Ti | P |
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Incoloy 800 | 30.00–35.00 | 19.00–23.00 | ≥39.5 | ≤0.10 | ≤1.50 | ≤1.00 | ≤0.015 | 0.15–0.60 | 0.15–0.60 | ≤0.045 |
Property | Value |
---|---|
Tensile Strength | ≥550 MPa (80 ksi) |
Yield Strength (0.2% offset) | ≥240 MPa (35 ksi) |
Elongation | ≥30% |
Hardness (HB) | ≤195 |
Property | Value |
---|---|
Density | 8.0 g/cm³ |
Melting Point | 1350–1400°C |
Thermal Conductivity | 15.1 W/m·K (100°C) |
Electrical Resistivity | 103 μΩ·cm |
Thermal Expansion | 13.3 μm/m·°C (20–100°C) |
Elastic Modulus | 200 GPa |
Outer Diameter: 6–457 mm
Wall Thickness: 1–45 mm
Custom lengths available upon request
Parameter | Incoloy 800 (N08800) | Incoloy 800H (N08810) | Incoloy 800HT (N08811) |
---|---|---|---|
Carbon Content | ≤0.10% | 0.05–0.10% | 0.06–0.10% |
Al+Ti Content | 0.30–1.20% | 0.85–1.20% (min) | 0.85–1.20% (min) |
High-Temp Strength | Good | Excellent | Superior |
Creep Resistance | Moderate | High | Very High |
Typical Use | General high-temp | Long-term high-temp | Extreme high-temp |
Service Temp. | Up to 870°C | Up to 980°C | Up to 1100°C |
800H and 800HT have higher carbon and controlled Al+Ti ratios for improved creep strength at elevated temperatures.
800HT is optimized for extreme heat with enhanced stability in cyclic thermal environments.
Oxidation Resistance: Withstands continuous service up to 870°C, maintaining structural integrity in furnace components and heat exchangers.
Carburization Resistance: The nickel-chromium matrix resists carbon absorption in carburizing atmospheres, outperforming low-alloy steels.
Acid & Alkali Resistance: Performs well in neutral to slightly acidic solutions, making it suitable for chemical processing.
Chloride Environments: Resists stress corrosion cracking in mild chloride solutions, though not recommended for severe chloride exposure.
Thermal Fatigue Resistance: Maintains ductility and strength in cyclic temperature applications, ideal for thermal cycling systems.
Weldability: Readily weldable by TIG, MIG, and stick welding, with minimal risk of carbide precipitation when proper procedures are followed.
Formability: Supports cold and hot working, allowing complex shapes for heat treatment fixtures and high-temperature pipes.
Machinability: Can be machined with standard tools, though slow speeds and high lubrication are recommended for optimal results.
Boiler Systems: Superheater and reheater tubes, steam headers, and pigtails in coal-fired power plants.
Nuclear Industry: Steam generators and reactor components requiring high-temperature stability and radiation resistance.
Heat Exchangers: Equipment for handling corrosive gases and liquids in refineries and chemical plants.
Reactors & Furnaces: Components in ethylene production and other high-temperature chemical syntheses.
Furnace Components: Radiant tubes, retorts, and baskets for heat-treating processes in automotive and aerospace industries.
Industrial Ovens: Structural parts in annealing and tempering furnaces.
Digester Equipment: Components exposed to high-temperature alkaline pulping chemicals.
Dryer Sections: Heat-resistant pipes and trays in paper manufacturing.
Gas Turbine Components: Exhaust systems and heat shields in aircraft engines.
Geothermal Energy: Tubing for high-temperature, acidic geothermal brine extraction.
Composition: Incoloy 800 has higher nickel (30–35%) and chromium (19–23%) than 304 (8–10.5% Ni, 18–20% Cr), offering superior high-temperature oxidation resistance.
Temperature Range: 800 withstands up to 870°C, while 304 is suitable up to 425°C.
Mill test certificates as standard
EN 10204 3.1B and 3.2 certifications upon request
Third-party inspection reports (e.g., radiography, PMI) for quality assurance