ASTM B407 UNS N08811 Nickel alloy seamless pipe for petrochemical industry
ASTM B407 UNS N08811 Nickel alloy seamless pipe for petrochemical industry
ASTM B407 UNS N08811 (Incoloy 800HT) nickel alloy seamless tubing is widely used in high-temperature applications within the petrochemical industry due to its excellent corrosion and creep resistance. The alloy resists carburizing, oxidizing, and nitriding environments, maintaining good mechanical properties even at temperatures exceeding 600°C (1100°F). Key requirements include adherence to a specific chemical composition and mechanical properties, such as tensile strength and grain size, which are confirmed through various tests.
What are the ASTM specifications for Incoloy 800?
This nickel-iron-chromium alloy, Incoloy 800 pipe, maintains its austenitic microstructure even when exposed to high temperatures. According to ASTM B407, these pipes are annealed at 1800°F for 15 minutes. After annealing, the 800 alloy seamless pipe is air-cooled.
ASTM B407 UNS N08811 Nickel Alloy Seamless Pipe for Petrochemical and Refinery Applications
ASTM B407 UNS N08811 is a nickel-iron-chromium alloy pipe designed for high-temperature and corrosive environments. Commonly known as 800HT alloy, it is a high-performance material with excellent resistance to oxidation, carburization, and other forms of high-temperature corrosion. The seamless form ensures superior mechanical properties and structural integrity under harsh conditions.
Key Features of ASTM B407 UNS N08811 Seamless Pipe:
High-Temperature Resistance
N08811 alloy exhibits excellent thermal stability, making it well-suited for long-term exposure to high temperatures up to 1100°F (593°C) and above.
Corrosion Resistance
Even in extreme environments such as chemical processing plants, the alloy offers exceptional resistance to oxidation, carburization, and sulfidation.
Mechanical Strength
Enhanced mechanical properties, thanks to the addition of appropriate amounts of titanium (Ti) and aluminum (Al), ensure excellent creep and stress-rupture strength.
Seamless Construction
The seamless manufacturing process ensures uniformity, eliminates weak points, and provides greater strength and reliability than welded pipe.
Petrochemical Industry Applications
Process piping in ethylene plants and other facilities.
Furnace and heat exchanger manufacturing.
High-temperature and high-pressure process components.
Heat treatment equipment and devices.
General chemical and petrochemical processing.
Chemical Composition of ASTM B407 UNS N08811 Tube
| Grade | Ni | Cu | Iron | Mn | Al | Si | S | Cr | Ti | |
| N08811 | Min | 30.0 | 39.5 | 0.15 | 19.0 | 0.15 | ||||
| Max | 35.0 | 0.75 | 1.5 | 0.60 | 1.0 | 0.015 | 23.0 | 0.60 |
Mechanical Properies of ASTM B407 UNS N08811 Pipe
| Grade | Tensile Str Ksi(Mpa) | Yield Str Ksi(Mpa) | Elongation(%) |
| N08811 | ≥65000(450) | ≥25000(170) | ≥30 |
Petrochemical Industry Applications
Process Piping: For use in high-temperature and corrosive process piping.
Heat Exchangers: Suitable for heat exchanger tubes and other related equipment.
Furnaces and Heating Equipment: Suitable for jacketing of furnace components, heat treatment equipment, and electric heating elements.
Ethylene and Other Chemical Processes: Commonly used in petrochemical process equipment, such as those involved in ethylene production.
Manufacturing and Specifications
Seamless: This standard specifies requirements for seamless tubing, ensuring a high-quality, defect-free product.
Heat Treatment: Mechanical properties such as yield strength and tensile strength are affected by heat treatment processes (such as annealing).
Quality Testing: Manufacturers perform various tests, including hydrostatic pressure testing, hardness testing, and chemical analysis, to ensure material conformity to ASTM B407.
Gnee Steel specializes in the production and sale of various nickel-based alloys, including Nickel 201, Nickel 202, Hastelloy C-276, Hastelloy C-22, Hastelloy B, Hastelloy C-4, Inconel Alloy 600, Inconel 625, Inconel 718, Inconel X-750, Incoloy Alloy 800, Incoloy 800H/HT, Incoloy 825, Monel Alloy 400, Monel K500, and high-temperature alloys. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, and nuclear energy applications, and we can provide customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneemetal.com.
