alloys 800H (UNS N08810) and 800HT (UNS N08811) are dual-certifiable Nickel-Iron-Chromium materials that resist oxidation, carburization and other high temperature corrosion.
Alloy 800H / 800HP is a high-strength, corrosion-resistant nickel-iron-chromium alloy designed for high-temperature service. Both 800H and 800HP are variants of Alloy 800, with enhanced creep and stress rupture properties due to controlled carbon content and grain size. These alloys are commonly used in applications like heat exchangers, pressure vessels, and furnace components in petrochemical and power generation industries. They offer excellent resistance to oxidation, carburization, and other forms of high-temperature corrosion. Alloy 800HP provides even higher strength compared to 800H due to additional precipitation hardening elements.
Alloy 800 is a widely used construction material for equipment that requires corrosion resistance, high strength or resistance to oxidation, carburisation and other deleterious effects of high temperature exposure. For high temperature applications where optimum creep and fracture properties are required, Alloy 800HP is used. The chromium in the alloy provides resistance to oxidation and corrosion. The high nickel content maintains an austenitic structure, making the alloy ductile. The nickel also contributes to resistance to scaling, general corrosion and stress corrosion cracking. The iron content provides resistance to internal oxidation.
| AVAILABILITY | SPECS | |
|---|---|---|
| FLANGES | 1/2" - 8" | B160, B564, B16.5 |
| FORGINGS | B564 | |
| TENSILE REQUIREMENTS | |
|---|---|
| TENSILE STRENGTH | (KSI) 120 - 150 |
| YIELD STRENGTH | (KSI) 60 - 95 |
| ELONGATION | 30% MIN. |
| C | CR | FE | NI | AL | TI | AL + TI | SI | MN | CU | S |
|---|---|---|---|---|---|---|---|---|---|---|
| MIN | MAX | MAX | MAX | |||||||
| 0.05 - 0.10 | 19.0 - 23.0 | 39.5 | 30.0 - 35.0 | 0.15 - 0.60 | 0.15 - 0.60 | 0.30 - 1.20 | 1.00 | 1.5 | 0.75 | 0.015 |
Alloy 800H and Alloy 800HP are robust materials designed for challenging high-temperature environments. Their exceptional resistance to oxidation, carburization, and other forms of corrosion, coupled with their high-temperature strength, make them the preferred choice for critical applications across various industries.
Ceramic lined pipe is made through self-propagating high-temperature synthesis (SHS) technique.
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