Alloy 800HT / Incoloy 800HT
Alloy 800HT is a further controlled version of Alloy 800H with restricted carbon, aluminium and titanium contents and specified heat treatment to improve elevated-temperature creep and stress-rupture performance.
Alloy 800HT / Incoloy 800HT Information
Alloy 800HT is a further controlled version of Alloy 800H with restricted carbon, aluminium and titanium contents and specified heat treatment to improve elevated-temperature creep and stress-rupture performance.
Metallic winding and compatible ring components where service conditions are suitable.
| Material specification | ASTM B409 |
|---|---|
| Specified grade / UNS | Alloy 800HT N08811 |
Alloy 800HT / Incoloy 800HT 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 % | 0.06–0.10 |
| Cu % | ≤0.75 |
| Si % | ≤1.0 |
| S % | ≤0.015 |
| Al % | 0.15–0.60 |
| Ti % | 0.15–0.60 |
| Combined limit % | Al + Ti 0.85–1.20 |
Alloy 800HT / Incoloy 800HT 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 800HT N08811
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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