Alloy 800H / Incoloy 800H
Alloy 800H is the controlled-carbon, controlled-grain-size version of Alloy 800 developed for improved creep and stress-rupture strength at elevated temperature.
Alloy 800H / Incoloy 800H Information
Alloy 800H is the controlled-carbon, controlled-grain-size version of Alloy 800 developed for improved creep and stress-rupture strength at elevated temperature.
Metallic winding and compatible ring components where service conditions are suitable.
| Material specification | ASTM B409 |
|---|---|
| Specified grade / UNS | Alloy 800H N08810 |
Alloy 800H / Incoloy 800H Chemical Composition
ASTM B409 · Grade-specific requirements
| Element / requirement | Value |
|---|---|
| Ni % | 30.0–35.0 |
| Cr % | 19.0–23.0 |
| Fe % | ≥39.5 |
| Mn % | ≤1.5 |
| C % | 0.05–0.10 |
| Cu % | ≤0.75 |
| Si % | ≤1.0 |
| S % | ≤0.015 |
| Al % | 0.15–0.60 |
| Ti % | 0.15–0.60 |
| Combined limit % | — |
Alloy 800H / Incoloy 800H Mechanical Properties
ASTM B409 · Grade-specific requirements
| Product form / condition | Tensile min (MPa) | Yield min (MPa) | Elongation min (%) | Hardness |
|---|---|---|---|---|
| Hot-rolled plate · Annealed | 450 | 170 | 30 | — |
| Sheet / strip ≥0.115 in. (2.92 mm) · Annealed | 450 | 170 | 30 | — |
ASTM B409 Grade Reference
Alloy 800H N08810
The chemical and mechanical tables on this page use the ASTM B409 requirements for this grade, including the product conditions listed in the standard overview.
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