Incoloy 800H
Higher-carbon version of Alloy 800 with improved creep and rupture strength for high-temperature service.
Material overview
Incoloy 800H belongs to the Nickel-Based Alloys section of the catalog. Higher-carbon version of Alloy 800 with improved creep and rupture strength for high-temperature service. The technical review record highlights Controlled carbon (0.05-0.10%) and grain size for creep strength and oxidation and carburization resistance. Listed applications include Ethylene furnace tubes, manifolds, reformer pigtails, industrial furnaces, and high-temperature pressure equipment. The dataset currently includes 13 property records covering chemical composition, mechanical properties, and physical properties. Standards and product forms associated with the grade include B409, B408, and GB/T 15007 and Seamless Pipe / Tube and Plate. Final material properties and delivery conditions must be verified against the applicable specification and inspection documents.
Key characteristics
- Controlled carbon (0.05-0.10%) and grain size for creep strength
- oxidation and carburization resistance
Typical applications
- Ethylene furnace tubes
- manifolds
- reformer pigtails
- industrial furnaces
- high-temperature pressure equipment
Grade names and equivalents
Technical properties
Typical values are for reference only. Final chemistry, mechanical properties, heat treatment, dimensions, inspection, and documentation are confirmed against the applicable specification and MTC/COA before order acceptance.
Chemical composition
| Property | Value | Unit | Condition / standard |
|---|---|---|---|
| Ni | 30.0-35.0 | wt% | Typical value |
| Cr | 19.0-23.0 | wt% | Typical value |
| Fe | 39.5 min | wt% | Typical value |
| C | 0.05-0.10 | wt% | Typical value |
| Mn | 1.5 max | wt% | Typical value |
| Si | 1.0 max | wt% | Typical value |
| Al | 0.15-0.6 | wt% | Typical value |
| Ti | 0.15-0.6 | wt% | Typical value |
| Cu | 0.75 max | wt% | Typical value |
Mechanical properties
| Property | Value | Unit | Condition / standard |
|---|---|---|---|
| Tensile strength | min 450 | MPa | Annealed |
| Yield strength 0.2% | min 170 | MPa | Annealed |
| Elongation | min 30 | % | Annealed |
Physical properties
| Property | Value | Unit | Condition / standard |
|---|---|---|---|
| Density | 7.94 | g/cm3 | Typical |