| Weight % | Ni | Cr | Fe | C | Al | Ti | Al+Ti |
| Alloy 800 | 30-35 | 19-23 | ≥39.5 | ≤0.10 | 0.15-0.60 | 0.15-0.60 | 0.30-1.20 |
| Alloy 800H | 30-35 | 19-23 | 39.5 | 0.05-0.10 | 0.15-0.60 | 0.15-0.60 | 0.30-1.20 |
| Alloy 800HT | 30-35 | 19-23 | 39.5 | 0.06-0.10 | 0.25-0.60 | 0.25-0.60 | 0.85-1.20 |
Chemical Composition
Typical Mechanical Properties
| Material | Temp |
Hardnes BHN |
Tensile Strength MPa | Yield Strength (0.2% Offset) | |||
| °F | °C | ksi | MPa | ksi | MPa | ||
| Alloy 800H and Alloy 800HT | 80 | 27 | 126 | 77.8 | 536 | 21.7 | 150 |
| Alloy 800H and Alloy 800HT | 800 | 425 | 67.5 | 465 | 18.8 | 130 | |
| Alloy 800H and Alloy 800HT | 1000 | 540 | 90 | 62.7 | 432 | 13 | 90 |
| Alloy 800H and Alloy 800HT | 1200 | 650 | 84 | 54.8 | 378 | 13.5 | 93 |
| Alloy 800H and Alloy 800HT | 1300 | 705 | 82 | 47.7 | 329 | 15.8 | 109 |
| Alloy 800H and Alloy 800HT | 1400 | 760 | 74 | 34.2 | 236 | 13.1 | 90 |
Standard
| Pipe | ASTM B 407/B 829, ASME SB 407/SB 829 (Seamless Pipe), BS 3074NA15 (Seamless Pipe), DIN 17459 | ||||||
| Tube | ASTM B 163, ASME SB 163 (Seamless Condenser & Heat Exchanger Tubes), ASTM B 407/B 829, ASME SB 407/SB 829 (Seamless Tube), ASTM B 515/B 751, ASME SB 515/SB 751 (Welded Tubes), BS 3074NA15 (Seamless Tubes), ISO 6207, DIN 17459 | ||||||
Applications
Chemical and Petrochemical Processing—process equipment for the production of ethylene, ethylene dichloride, acetic anhydride, ketene, nitric acid and oxy-alcohol
Petroleum Refining—steam/hydrocarbon reformers and hydrodealkylation units
Power Generation—steam super-heaters and high temperature heat exchangers in gas-cooled nuclear reactors, heat exchangers and piping systems in coal-fired power plants
Thermal Processing Fixtures—radiant tubes, muffles, retorts and fixtures for heat-treating furnaces
Material Summary
Alloy 800 - The 800 series of alloy (Incoloy 800, 800H and 800HT) are nickel-iron-chromium superalloys that have excellent properties of high temperature strength and resistance to oxidation, carburization and other types of high temperature corrosion. Alloy 800, 800H and 800HT are used in various applications from furnace components, petrochemical furnace cracker tubes to sheathing for electrical heating elements. Application: Chemical and petrochemical process piping, heat exchangers, furnace components, carburizing equipment, heating-element sheathing, and nuclear power steam-generator tubing.
