Incoloy 800HT has superior corrosion resistance in oxidizing corrosive environments such as nitric acid and nitric acid-sulfuric acid. They perform similarly well in sodium salt and other molten salt environments, and provide stress corrosion crack sensitivity surpassing standard austenitic stainless steels. Alloy 800HT is widely used in chemical plants, heat treatment furnaces , and other high-temperature environments.
Incoloy 800HT Specifications
| UNS | W.Nr5 |
| N08811 | 1.4959 |
Incoloy 800HT Chemical composition
| Grade | % | Ni | Cr | Fe | C | Mn | Si | Cu | S | Al | Ti |
| 800HT | Min | 30 | 19 | Bal. | 0.05 | 0.15 | 0.15 | ||||
| Max | 35 | 23 | 0.10 | 1.5 | 1 | 0.75 | 0.015 | 0.60 | 0.60 |
Incoloy 800HT Mechanical properties: (Minimum value at 20℃)
| Tensile Strength
σb/MPa |
Yield Strength
σp0.2/MPa |
Elongation
σ5 /% |
| 500 | 210 | 35 |
Incoloy 800HT Standards
| Bar | Forging | Sheet/Strip | Wire | Pipe |
| ASTM B408 | ASTM B564 | ASTM B409 | ASTM B408 | ASTM B407
ASTM B514 |
