Information about Incoloy 800/800H/800HT round bars
Information about Incoloy 800/800H/800HT round bars
Incoloy 800, 800H, and 800HT round bars are nickel-iron-chromium alloy bars suitable for high-temperature applications, offering excellent oxidation and carburization resistance, but with varying carbon content. The 800H and 800HT alloy bars have higher carbon content for improved creep strength; the 800HT bars also contain titanium and aluminum additions for superior performance at temperatures up to approximately 925°C. All of these alloys are available as round bars for use in furnaces, heat exchangers, and chemical processing equipment.
What is 800HT material?
Nickel alloy 800H/800HT bars, rods, and wires are a nickel-iron-chromium alloy that exhibits high strength at elevated temperatures and excellent resistance to oxidation and carburization. They also demonstrate excellent corrosion resistance in a variety of aqueous environments.
Incoloy 800 rods are bar-shaped profiles made from a nickel-iron-chromium austenitic alloy (Incoloy 800/800H/800HT). Their core characteristic is excellent resistance to creep, carburization, and high-temperature oxidation at temperatures up to approximately 815°C, while maintaining good strength and thermal stability. They are specifically used in the manufacture and processing of critical components that require long-term exposure to high-temperature corrosive atmospheres and mechanical stress, such as high-temperature heat treatment furnace components, petrochemical cracking tubes, industrial heaters, and nuclear power steam generators. They are a specialized high-performance raw material for addressing high-temperature oxidation and thermal fatigue problems.
Incoloy 800H rods are bar-shaped profiles made from Incoloy 800H alloy. Their core characteristic is that, through a higher carbon content (0.05-0.10%) and specific solution heat treatment, they provide excellent resistance to creep, carburization, and high-temperature oxidation at temperatures up to approximately 815°C, while maintaining excellent high-temperature strength and structural stability. They are specifically used in the manufacture and processing of critical pressure-bearing components in extreme environments requiring long-term exposure to high temperatures, high pressures, and thermal cycling, such as petrochemical cracking furnace tubes, high-temperature heat exchangers, industrial heaters, and nuclear power steam generators. They are a high-performance raw material for high-temperature creep resistance applications.
Incoloy 800HT rods are bar-shaped profiles made from Incoloy 800HT alloy. Their core characteristic is that, through precise control of carbon, aluminum, and titanium content and stabilization treatment, they provide optimal resistance to creep, carburization, and high-temperature oxidation at temperatures up to approximately 815°C, while possessing extremely high high-temperature strength and long-term stability. They are specifically used in the manufacture and processing of critical pressure-bearing components in extreme environments requiring long-term exposure to high temperatures, high pressures, and severe thermal cycling, such as petrochemical cracking furnace tubes, high-temperature heat exchangers, industrial heaters, and nuclear power steam generators. They are a top-tier raw material for high-temperature creep and fatigue resistance applications.
Incoloy 800/800H/800HT Round Bar Specifications
Specifications: ASTM B425 / ASME SB425
Standards: EN, DIN, JIS, ASTM, BS, ASME, AISI
Length: 100 mm to 3000 mm and above
Size: 5 mm to 500 mm
Shape: Round, Square, Hexagonal (across flats), Rectangular, Billet, Ingot, Forging, etc.
Equivalent grades of Incoloy 800/800H/800HT round bars
| STANDARD | WERKSTOFF NR. | UNS | JIS | EN | OR | AFNOR | BS | GOST |
| Incoloy 800 | 1.4876 | N08800 | NCF 800 | X10NiCrAlTi32-20 | XH32T | Z8NC32-21 | NA 15 | ЭИ670 |
| Incoloy 800H | 1.4958 / 1.4876 | N08810 | NCF 800H | X5NiCrAlTi31-20 | XH32T | Z8NC33-21 | NA 15(H) | ЭИ670 |
| Incoloy 800HT | 1.4859 / 1.4876 | N08811 | NCF 800HT | X8NiCrAlTi32-21 | XH32T | – | NA 15(HT) | ЭИ670 |
Chemical composition of Incoloy 800/800H/800HT round bars
| Incoloy | Fe | Si | Cr | Cu | Al | C | Mn | Ti | S |
| 800 | 39.5 min | 1.0 max | 19-23 | 0.75 max | 0.15-0.60 | 0.1 max | 1.5 max | 0.15-0.60 | 0.015 max |
| 800H | 39.5 min | 1.0 max | 19-23 | 0.75 max | 0.15-0.60 | 0.05-0.1 | 1.5 max | 0.15-0.60 | 0.015 max |
| 800HT | 39.5 min | 1.0 max | 19-23 | 0.75 max | 0.85-1.20 | 0.06-0.1 | 1.5 max | 0.25-0.6 | 0.015 max |
Mechanical Properties of Incoloy 800/800H/800HT Round Bars
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.94 g/cm3 | 1385 °C (2525 °F) | Psi – 75,000 , MPa – 520 | Psi – 30,000 , MPa –205 | 30 % |
Common Applications of Incoloy 800/800H/800HT Round Bars:
Furnace components and cracking furnaces (ethylene, vinyl chloride).
Chemical and petrochemical processing equipment.
Heat exchangers and boilers.
Electric heating element sheaths.
Typical Specifications and Available Forms of Incoloy 800/800H/800HT:
Specifications: AMS 5766 (for bars/rods).
Surface finishes: Bright, polished, black, hot rolled, cold drawn, centerless ground.
Sizes: Bars approximately 3/4 inch to 6 inches in diameter, custom lengths available.
Why Choose Gnee as Your Nickel-Based Alloy Supplier
✅ Over 18 years of export experience, products sold to more than 80 countries
✅ Certified by ISO, SGS, and BV
✅ Global inventory of Inconel, Hastelloy, Incoloy, and Monel alloy tubing, plates, and bars
✅ Custom processing services available – including cutting, polishing, CNC machining, and packaging
✅ Fast delivery within 7-15 days, supported by global logistics partners
📦 Packaging and Shipping
All stainless steel products are packaged using the following methods:
Wooden pallets or crates
Moisture-proof packaging
Labels with furnace number, standard, and size labels
Shipped worldwide by sea, air, or express
Testing and Packaging
To verify the quality of these products, we conduct various tests. These tests include flaring tests, flattening tests, third-party inspections, visual inspections, chemical composition analysis, and more. All tests are conducted according to the customer's quality and performance requirements for these products.
Finally, these Incoloy 800/800H/800HT round bars and wires are packaged with waterproof packaging materials to prevent rust and damage.
Gnee Steel also supplies custom incoloy 800/800H/800HT products in various sizes and specifications. Please send us your drawings for a quote!
