| Category | Item | Description / Specification |
|---|---|---|
| 1. General Information | Product Name | Incoloy 800 / Incoloy 800H / Incoloy 800HT |
| Common Standards | UNS N08800 (800), UNS N08810 (800H), UNS N08811 (800HT) | |
| Product Forms | Plate, Sheet, Strip, Bar, Pipe, Tube, Wire, Forgings, Fittings | |
| Overview | A nickel-iron-chromium alloy known for its excellent strength and resistance to oxidation and carburization at high temperatures. | |
| 2. Chemical Composition | Key Elements (%) | Ni: 30.0-35.0, Cr: 19.0-23.0, Fe: ≥39.5 |
| Carbon (Key Difference) | 800: 0.10 max, 800H: 0.05-0.10, 800HT: 0.06-0.10 | |
| Other Elements | Al: 0.15-0.60, Ti: 0.15-0.60, Mn: 1.50 max, Si: 1.00 max, Cu: 0.75 max | |
| Stabilizing Elements | 800HT: Ti ≥ 0.85, Al ≤ 0.70, and (Al+Ti) 1.20-1.80 (for improved stability) | |
| 3. Mechanical Properties | Tensile Strength (Room Temp) | ≥ 515 MPa (75 ksi) |
| Yield Strength (0.2% Offset, Room Temp) | ≥ 205 MPa (30 ksi) | |
| Elongation (Room Temp) | ≥ 30% | |
| Key Feature of 800H/HT | 800H/HT are required to meet minimum elevated temperature yield strength requirements (per ASTM B409/ASME SB409). | |
| 4. Physical Properties | Density | 8.00 g/cm³ (0.289 lb/in³) |
| Melting Range | 1350 - 1400 °C (2460 - 2550 °F) | |
| Magnetic Permeability | Typically < 1.05 (essentially non-magnetic) | |
| 5. Key Characteristics | High-Temperature Strength | Excellent mechanical strength and resistance to creep and rupture at temperatures up to ~1100°C (2000°F) for 800H/HT. |
| Oxidation Resistance | Excellent resistance to scaling and oxidation at high temperatures. | |
| Carburization & Nitridation | Good resistance to corrosive effects of carburizing and nitriding atmospheres. | |
| Corrosion Resistance | Good resistance to a wide variety of aqueous corrodents, including acid, alkalies, and salts. | |
| 6. Common Applications | Heat Treatment Industry | Furnace rolls, retorts, radiant tubes, annealing covers, baskets. |
| Chemical & Petrochemical | Heat exchangers, reformer and cracker furnace tubes, piping systems. | |
| Power Generation | Superheater and reheater tubes, steam headers, nuclear steam generator tubing. | |
| Industrial Heating | Structural components for high-temperature furnaces. | |
| 7. Available Conditions | Plate, Sheet, Bar | Annealed, Solution Annealed, Hot Finished, Cold Drawn. |
| Surface Finish | Hot Rolled, Pickled, Cold Rolled, Polished (as re |