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ASTM B409 Alloy 800H Plate | UNS N08810 | Incoloy 800H
| MOQ: | 5Ton |
| Price: | Based on grade, size, surface, processing, quantity and current raw material market price. |
| Standard Packaging: | Standard seaworthy export packing with bundles, waterproof wrapping, pallets or wooden cases. |
| Delivery Period: | 7-15 |
| Payment Method: | L/C,D/A,D/P,T/T,Western Union |
| Supply Capacity: | Stock supply, regular production and custom manufacturing available. |
Shaanxi Shangyou Stainless Steel Co., Ltd. supplies Nickel Alloy 800H, also known as Incoloy 800H, identified as UNS N08810 and Werkstoff 1.4876 (EN material name X10NiCrAlTi32-20), in plate, sheet, and strip form according to ASTM B409 / ASME SB-409.
Nickel Alloy 800H is an austenitic, heat-resistant nickel-iron-chromium solid-solution alloy with controlled levels of carbon, aluminum, titanium, silicon, and manganese. The "H" designation indicates controlled carbon content (0.05-0.10%) and a high-temperature solution annealing treatment that produces an average grain size of ASTM 5 or coarser, significantly enhancing creep and stress-rupture strength compared to standard Alloy 800, particularly at temperatures above 600°C (1110°F). The alloy offers excellent resistance to oxidation, carburization, and nitriding, making it ideal for high-temperature structural applications.
| Item | Supply Information |
|---|---|
| Alloy Grade | Nickel Alloy 800H / Incoloy 800H |
| UNS Number | N08810 |
| EN / Werkstoff Number | 1.4876 / 1.4958 |
| EN Material Name | X10NiCrAlTi32-20 |
| Plate / Sheet / Strip Standard | ASTM B409 / ASME SB-409 |
| Bar / Rod Standard | ASTM B408 |
| Seamless Tube / Pipe Standard | ASTM B407 |
| Forgings Standard | ASTM B564 |
| Product Forms | Plate, sheet, strip |
| Thickness Range (Plate) | 5 mm and over in thickness and over 250 mm in width |
| Thickness Range (Sheet) | Under 5 mm in thickness |
| Width Range | Up to 2500 mm |
| Length Range | Up to 12000 mm |
| Supply Condition | Annealed (high-temperature solution annealed) |
| Heat Treatment Temperature | 2050°F (1121°C) minimum for UNS N08810 |
| Grain Size | ASTM 5 or coarser |
| Surface | Hot rolled, cold rolled, pickled, No.1, 2B, BA, No.4, polished |
| Testing | Chemical analysis, tensile, hardness, PMI, and dimensional inspection |
| Inspection Documents | EN 10204 3.1 MTC; third-party inspection optional |
| Element | Weight % (min) | Weight % (max) |
|---|---|---|
| Nickel (Ni) | 30.0 | 35.0 |
| Chromium (Cr) | 19.0 | 23.0 |
| Iron (Fe) | 39.5 | Balance |
| Carbon (C) | 0.05 | 0.10 |
| Aluminum (Al) | 0.15 | 0.60 |
| Titanium (Ti) | 0.15 | 0.60 |
| Aluminum + Titanium (Al+Ti) | 0.85 | 1.20 |
| Manganese (Mn) | — | 1.50 |
| Silicon (Si) | — | 1.00 |
| Copper (Cu) | — | 0.75 |
| Sulfur (S) | — | 0.015 |
Composition per ASTM B409 requirements.
| Property | Typical Reference |
|---|---|
| Density | 8.00 – 8.03 g/cm3 |
| Melting Range | 1,354 – 1,384°C |
| Modulus of Elasticity | ~196 GPa at 20°C |
| Thermal Conductivity | ~11.5 – 15.6 W/m-K |
| Electrical Resistivity | ~116 µΩ·cm |
| Coefficient of Expansion (20-100°C) | ~14.4 µm/m-°C |
| Tensile Strength, Annealed | 450 MPa (65 ksi) minimum |
| Yield Strength (0.2%), Annealed | 170 MPa (25 ksi) minimum |
| Elongation, Annealed | 30% minimum |
| Maximum Service Temperature | ~950°C for creep applications; ~982°C for oxidation |
| Heat Treatment | Solution annealed at 2050°F (1121°C) minimum; not age-hardenable |
| Grain Size | ASTM 5 or coarser |
| Product Standards | ASTM B409, ASME SB-409, ASTM B407, ASTM B408, ASTM B564, AMS 5871 |
Actual properties depend on product form, dimensions, and the specified standard.
Solution Annealed (High Temperature)
Alloy 800H plate is supplied in the solution-annealed condition. The standard solution annealing treatment is performed at a minimum temperature of 2050°F (1121°C) for UNS N08810, followed by rapid cooling. This high-temperature anneal, combined with the controlled carbon content (0.05-0.10%), produces an average grain size of ASTM 5 or coarser, which is essential for achieving the alloy's enhanced creep and rupture strength. The alloy is not age-hardenable and is strengthened only through solid-solution and grain-size control.
Creep Property Distinction
Unlike standard Alloy 800 (recommended for service below 600°C), Alloy 800H is specifically designed for applications requiring creep and rupture resistance above 600°C (1110°F). For applications involving frequent temperature excursions below 700°C, Alloy 800H is preferred over higher-strength variants.
Welding Considerations
Welding is commonly performed using RA82 (ERNiCr-3) bare wire for applications under 1450°F. For maximum strength, Alloy 617 (ERNiCrCoMo-1) is suggested. For welded fabrications above 1000°F, post-weld heat treatment at 1650°F for approximately one hour per inch of thickness may be recommended to avoid stress relaxation grain boundary cracking.
Alloy 800H provides excellent resistance to high-temperature corrosion and good aqueous corrosion resistance.
Key Corrosion Characteristics:
- Excellent oxidation resistance up to high temperatures
- Superior resistance to carburization and nitriding atmospheres
- Resistant to alternating oxidizing and reducing conditions
- Good resistance to chloride stress-corrosion cracking due to nickel content
- Good general corrosion resistance in many aqueous environments
- Metallurgical stability in long-term high-temperature service; remains ductile and resistant to embrittlement during extended use below 700°C
Selection Considerations:
- For applications where temperatures frequently cycle through 500-700°C, Alloy 800H should be utilized
- For service requiring even higher creep strength above 700°C, Alloy 800HT (UNS N08811) may be considered
- For standard Alloy 800 with soft anneal, recommended for service below 600°C
- Final selection must consider the specific medium, temperature, and exposure conditions
- Chemical and Petrochemical Processing: Steam/hydrocarbon reforming processes (pigtails, headers, manifolds, transfer piping), ethylene pyrolysis tubing (convection and radiant sections), ethylene dichloride cracking tubes, acetic anhydride and ketene production tubes
- Petroleum Refining: Heat exchangers, piping systems, coal conversion plants
- Power Generation: Steam generator tubing in high-temperature reactor systems
- Industrial: Process piping, pressure vessels, heat exchangers, boiler components, dampers, nitric acid catalyst supports, reformer outlet pigtails and manifolds
- Aerospace: Gas turbine components
Available quality-control services include:
- Heat-number traceability
- Chemical composition verification
- Tensile, yield and elongation testing
- Hardness inspection
- Dimensional and surface inspection
- Positive Material Identification (PMI)
- Ultrasonic testing
- Dye penetrant inspection
- Heat-treatment records
- EN 10204 3.1 material certificate
For an accurate quotation, please provide:
Alloy Grade · Standard · Product Form · Dimensions (Thickness × Width × Length) · Quantity · Surface Finish · Inspection Requirement · Application · Working Temperature · Destination Port
For high-temperature environments, also provide:
Operating Temperature · Cyclic Heating Requirements · Atmosphere Conditions (Oxidizing/Reducing/Carburizing)
- Request ASTM B409 Alloy 800H Plate Quote
- Upload Drawing or MTO
- Check Available Stock
- Ask for Alloy Selection Support
ASTM B409 Alloy 800H plate (UNS N08810) is a nickel-iron-chromium alloy plate with controlled carbon content (0.05-0.10%) and high-temperature annealing for enhanced creep-rupture strength above 600°C (1110°F).
The UNS designation is N08810; the European Werkstoff numbers are 1.4876 and 1.4958; the EN material name is X10NiCrAlTi32-20.
ASTM B409 / ASME SB-409 applies to Alloy 800H plate, sheet and strip.
Plate thickness typically ranges from 5 mm and above, with widths up to 2500 mm and lengths up to 12000 mm.
Alloy 800H is supplied in the solution-annealed condition at a minimum temperature of 2050°F (1121°C), which produces an ASTM 5 or coarser grain size essential for its creep properties. The alloy is not age-hardenable.
Alloy 800H has higher carbon content (0.05-0.10% vs 0.10% max) and receives a high-temperature solution anneal producing ASTM 5 or coarser grain size. These differences give Alloy 800H superior creep and rupture strength for service above 600°C.
Alloy 800H is designed for creep applications at temperatures above 600°C (1110°F) up to approximately 950°C, with good oxidation resistance to 982°C (1800°F).
It resists oxidation, carburization, nitriding, alternating oxidizing/reducing atmospheres, and sulfur-containing environments at high temperatures. It also provides good resistance to chloride stress-corrosion cracking.
Yes. Alloy 800H is readily weldable using standard shop fabrication practices. Recommended filler materials include RA82 (ERNiCr-3) for applications under 1450°F, and Alloy 617 for maximum strength applications.
Please provide the standard (ASTM B409), product form (plate), thickness, width, length, quantity, surface finish, inspection requirements, application, working temperature and destination port. For high-temperature service, also specify the operating temperature and atmosphere conditions.
