Alloy 800H / 800HT
UNS N08810 / N08811
Resumen
Iron-nickel-chromium alloy engineered for long-term high-temperature service with exceptional creep and rupture strength. 800H (annealed, 0.05-0.10% C) provides controlled grain size for creep resistance up to 815°C. 800HT (fine-grain, Al+Ti enhanced) extends service to 980°C. A more economical alternative to nickel-based superalloys for many petrochemical and power generation applications.
Composición Química (% en peso)
| Elemento | Mín | Máx |
|---|---|---|
| Ni (Níquel) | 30 | 35 |
| Cr (Cromo) | 19 | 23 |
| Fe (Hierro) | 39.5 | — |
| Al (Aluminio) | 0.15 | 0.6 |
| Ti (Titanio) | 0.15 | 0.6 |
| C (Carbono — 800H) | 0.05 | 0.1 |
| Mn (Manganeso) | — | 1.5 |
| Si (Silicio) | — | 1 |
Propiedades Mecánicas
| Propiedad | Valor | Condición |
|---|---|---|
| Resistencia a la Tracción | ≥ 520 MPa (75 ksi) | — |
| Límite Elástico (0.2%) | ≥ 205 MPa (30 ksi) | — |
| Elongación | ≥ 30% | — |
| Dureza | ≤ 90 HRB | recocido |
| Densidad | 7.94 g/cm³ | — |
Propiedades Físicas
| Propiedad | Valor |
|---|---|
| Rango de Fusión | 1357 – 1385 °C |
| Temp. Máx. de Servicio — 800H | 815°C (creep-limited) |
| Temp. Máx. de Servicio — 800HT | 980°C |
Resistencia a la Corrosión
Excellent oxidation and carburization resistance up to 980°C. Good resistance to sulfidation and nitriding atmospheres. Superior stress rupture strength compared to 304H/321H at temperatures above 650°C. Resistant to sigma phase embrittlement during long-term high-temperature exposure. More resistant to chloride SCC than austenitic stainless steels.
Aplicaciones Típicas
Normas Relacionadas
Productos Disponibles en Este Material
Explore nuestra gama de productos fabricados en Alloy 800H / 800HT