Incoloy 800 plate (UNS N08800) is a nickel-iron-chromium alloy plate designed for high-temperature strength, oxidation resistance, and stability up to 1500°F (816°C). It contains 30–35% nickel, 19–23% chromium, and a minimum of 39.5% iron, making it ideal for furnace components, heat exchangers, and petrochemical processing.
Key Specifications & Standards
UNS Number: N08800 (Alloy 800), N08810 (Alloy 800H), N08811 (Alloy 800HT)
Werkstoff Nr.: 1.4876
Standards: ASTM B409, ASME SB409, AMS 5871
Nickel: 30% – 35%
Chromium: 19% – 23%
Iron: 39.5% minimum
Carbon: 0.10% maximum (higher controlled ranges for 800H/800HT)
Aluminum & Titanium: 0.15% – 0.60% each
Density: 8.02–8.03 g/cm³
Melting Range: 1357°C – 1385°C (2475°F – 2525°F)
Tensile Strength: ~75,000 to 85,000 psi (520–586 MPa) annealed
Yield Strength (0.2% Offset): ~30,000 to 40,000 psi (205–276 MPa) annealed
Elongation: 30% to 43%
Industrial Furnaces: Radiant tubes, muffles, and furnace fixtures
Power Generation: Steam super-heater and re-heater tubing
Petrochemical Processing: Hydrocarbon cracking, ethylene quench boilers, and steam methane reforming
Chemical Handling: Heat exchangers and process piping resistant to stress-corrosion cracking
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