Product Description
INCOLOY 800H (UNS N08811) is a nickel-iron-chromium alloy designed for high-temperature and high-stress applications. It offers excellent resistance to oxidation, carburization, and other forms of high-temperature corrosion. The alloy is a modification of INCOLOY 800, with higher carbon content to enhance creep and stress rupture properties. It is widely used in applications requiring prolonged exposure to elevated temperatures in chemical, petrochemical, and power generation industries.
Key Properties
- High-Temperature Strength: INCOLOY 800H provides superior strength and resistance to creep and stress rupture at elevated temperatures.
- Corrosion Resistance: The alloy resists oxidation, carburization, and nitridation at high temperatures, maintaining its structural integrity in harsh environments.
- Thermal Stability: With excellent thermal stability, INCOLOY 800H performs well in applications requiring long-term exposure to temperatures above 600°C (1110°F).
- Good Weldability and Fabricability: The alloy is easily fabricated and welded using standard techniques, making it versatile for various industrial uses.
Chemical Composition
| Element |
Percentage (%) |
| Nickel (Ni) |
30.0 - 35.0 |
| Chromium (Cr) |
19.0 - 23.0 |
| Iron (Fe) |
Balance |
| Carbon (C) |
0.05 - 0.10 |
| Manganese (Mn) |
1.5 max |
| Silicon (Si) |
1.0 max |
| Copper (Cu) |
0.75 max |
| Aluminum (Al) |
0.15 - 0.60 |
| Titanium (Ti) |
0.15 - 0.60 |
Specifications
- UNS Number: N08811
- Product Forms: Strip, Coil, Foil, Sheet, Plate, Bar, Pipe, Tube
- Standards:
- ASTM B409
- ASME SB409
- ISO 9723
Applications
- Petrochemical and Chemical Processing: Used in reformer tubes, heat exchangers, and process piping due to its resistance to carburization and oxidation.
- Power Generation: Ideal for superheater and reheater tubing in coal-fired and nuclear power plants.
- Industrial Furnaces: Commonly used in furnace components, radiant tubes, and burners where resistance to oxidation and high-temperature strength are critical.
- Heat Exchangers: Suitable for heat exchanger tubes and headers exposed to aggressive media at high temperatures.
- Nuclear Reactors: Used in nuclear reactor components, thanks to its ability to withstand high temperatures and radiation environments.
Fabrication and Machining
- Welding: INCOLOY 800H can be welded using common welding methods, including TIG (Tungsten Inert Gas) and MIG (Metal Inert Gas). Pre-heating and post-weld heat treatment are recommended for high-stress applications.
- Machining: The alloy is machinable with standard tools but requires slower speeds and feeds due to its high strength and work-hardening properties.
- Hot Working: Hot working is performed between 1,150°C and 950°C (2,100°F to 1,750°F), followed by air cooling to achieve optimal mechanical properties.
- Cold Working: Cold working increases the strength and hardness of the alloy. It is recommended for applications requiring enhanced mechanical properties at room temperature.
Advantages
- High Strength: Maintains mechanical properties at temperatures up to 982°C (1,800°F).
- Oxidation Resistance: Excellent resistance to oxidation and scaling in high-temperature environments.
- Creep and Rupture Resistance: Enhanced creep and stress rupture strength due to the increased carbon content.
- Versatility: Suitable for a variety of industrial applications where both strength and corrosion resistance are required.
Applications Summary
INCOLOY 800H UNS N08811 is a reliable choice for high-temperature applications requiring superior strength and resistance to oxidation and carburization. Its excellent thermal stability, good weldability, and corrosion resistance make it an ideal material for demanding applications in chemical processing, power generation, and industrial furnaces. Its balance of nickel, chromium, and iron ensures durability and performance in aggressive environments, particularly those involving prolonged exposure to extreme temperatures.
Detailed Photos
Product application
Factory workshop
Company Profile
Shandong Titanium Nickel Special Steel Co., Ltd., registered funds (one thousand yuan for 10,000 yuan), the company is mainly committed to high -tech enterprises that are integrated with special alloy materials, specializing in the research and sales of special alloys such as nickel -based and iron -based. Products include corrosion-resistant alloys, superalloys, precision alloys, Hastelloy, Monel, INCONEL, INCOLOY, copper-nickel alloys, titanium and titanium alloys, zirconium and zirconium alloys, nickel and nickel-based alloys, nickel-cobalt-based heat-resistant alloys , Hafnium alloy, etc., more than 60 kinds of alloy materials such as special stainless steel. On the basis of stabilizing the quality of the original products, according to the market demand, it solves the quality problems existing in the traditional metallurgical process, and ensures the low miscellaneous and low deflection of the alloy material products, which has won an excellent reputation in the industry.
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FAQ
1. What is INCOLOY?
INCOLOY is a family of nickel-iron-chromium alloys designed for excellent corrosion resistance and high-temperature strength. These alloys are widely used in industries such as chemical processing, power generation, and aerospace due to their durability in extreme environments.
2. What are the key grades of INCOLOY?
- INCOLOY 800: High strength and excellent resistance to oxidation and carburization at elevated temperatures.
- INCOLOY 800H/800HT: Modified versions of 800 with enhanced creep-rupture strength.
- INCOLOY 825: Excellent resistance to acid attack, particularly sulfuric and phosphoric acids.
- INCOLOY 925: High strength and corrosion resistance in sour gas environments.
- INCOLOY 945/945X: Designed for oil and gas applications with superior corrosion resistance.
3. What are the main applications of INCOLOY?
- Chemical and Petrochemical Processing: Heat exchangers, piping systems, and reactors.
- Power Plants: Superheaters, reheaters, and heat recovery systems.
- Oil and Gas: Downhole equipment and sour gas environments.
- Marine: Desalination plants and seawater piping systems.
- Aerospace: Engine components and high-temperature structural parts.
4. How is INCOLOY different from INCONEL?
While both are nickel-based alloys, the key difference lies in their composition and application:
- INCOLOY: Primarily nickel-iron-chromium alloys, ideal for environments requiring resistance to both heat and corrosion.
- INCONEL: Primarily nickel-chromium-based, with superior performance in high-temperature environments.
5. What forms is INCOLOY available in?
- Sheet
- Plate
- Coil
- Strip
- Bar
- Pipe
- Tube
- Fittings and Flanges
6. What industries commonly use INCOLOY?
- Chemical processing
- Oil and gas
- Power generation
- Aerospace
- Marine and desalination
7. Can INCOLOY be welded?
Yes, INCOLOY can be welded using standard welding techniques, such as TIG, MIG, or stick welding. It's recommended to use matching filler materials, and proper pre-weld and post-weld practices should be followed to avoid cracking or corrosion issues.
8. What are the temperature limits for INCOLOY alloys?
Temperature limits vary by grade:
- INCOLOY 800: Up to 1100°F (593°C) for long-term use, higher for short durations.
- INCOLOY 825: Typically up to 1000°F (538°C).
- INCOLOY 800H/800HT: Optimized for use at 1100-1800°F (593-982°C).
9. What is the chemical composition of INCOLOY alloys?
The composition varies by grade, but a typical INCOLOY alloy includes:
- Nickel (30-46%)
- Iron (Balance)
- Chromium (19-30%)
- Small amounts of molybdenum, titanium, aluminum, and other elements, depending on the grade.
10. How can I contact you for more information?
You can contact us through the following methods:
Online support: Visit our website for live chat
Address:
300 Meters North of Liaoniu Road and Xindong Ring Road, Liaocheng High-Tech Zone, Liaocheng, Shandong, China
We look forward to providing you with high-quality products and services!
If you have any other questions, feel free to contact us, and we will do our best to assist you!
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