Alloy 800 / Incoloy 800
Alloy 800 is a nickel-iron-chromium alloy developed for oxidation and carburization resistance with useful strength at elevated temperature. The correct INCO trade-family name is INCOLOY alloy 800; the folder name is retained for URL compatibility.
Alloy 800 / Incoloy 800 Information
Alloy 800 is a nickel-iron-chromium alloy developed for oxidation and carburization resistance with useful strength at elevated temperature. The correct INCO trade-family name is INCOLOY alloy 800; the folder name is retained for URL compatibility.
Metallic winding and compatible ring components where service conditions are suitable.
| UNS Number | N08800 |
|---|---|
| Correct Trade Family | INCOLOY alloy 800 |
| Material Type | Ni-Fe-Cr heat-resistant alloy |
| Common / Applicable Specification | ASTM B409 (plate/sheet/strip) |
| Typical Gasket Use | Metallic winding and compatible ring components where service conditions are suitable. |
Alloy 800 / Incoloy 800 Chemical Composition
Reference composition limits are shown below. Exact requirements should be confirmed against the applicable product specification and certified material documentation.
| Element / Constituent | Symbol | Composition / Information |
|---|---|---|
| Nickel | Ni | 30.0–35.0 |
| Chromium | Cr | 19.0–23.0 |
| Iron | Fe | 39.5 min. |
| Carbon | C | 0.10 max. |
| Manganese | Mn | 1.50 max. |
| Silicon | Si | 1.00 max. |
| Aluminium | Al | 0.15–0.60 |
| Titanium | Ti | 0.15–0.60 |
| Al + Ti | Al+Ti | 0.30–1.20 |
Alloy 800 / Incoloy 800 Mechanical Properties
Reference room-temperature properties are shown for a commonly supplied condition. Exact requirements depend on product form, size, heat treatment and governing specification.
| Property | Reference Value | Unit / Basis |
|---|---|---|
| Tensile Strength | ≈520 min. | MPa |
| 0.2% Offset Yield Strength | ≈205 min. | MPa |
| Elongation | ≈30 min. | % |
Values shown are engineering reference data, not universal design allowables. Final procurement and design must use the governing specification, exact product form/condition and certified material test documentation.
Alloy 800 / Incoloy 800 Physical & Service Information
Reference physical properties and service considerations relevant to material selection for Spiral Wound Gaskets.
| Density | Approx. 7.94 g/cm³ |
|---|---|
| Structure | Austenitic Ni-Fe-Cr alloy |
| High-Temperature Behaviour | Good resistance to oxidation and carburization. |
| Heat Treatment | Normally annealed; 800 is not the controlled-carbon/grain-size version used for the highest creep-temperature applications. |
| Service Selection | For creep-controlled high-temperature pressure service, distinguish clearly between 800, 800H and 800HT. |
Specify Alloy 800 for your gasket
Share your gasket dimensions, service conditions and quantity for Alloy 800 material options and pricing.