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, a high-nickel alloy also known as Incoloy 800HT, is used in seamless pipes for the petrochemical industry due to its excellent resistance to high temperatures and corrosion, including carburization, nitriding, and oxidation. Its excellent creep and rupture strength make it well-suited for processes involving extreme temperatures and corrosive environments in ethylene production and other chemical processing equipment.
What is the chemical composition of ASTM B407 UNS N08811?
ASTM B407 alloy is composed of nickel, iron, and chromium. This specification generally applies to seamless pipe and covers Incoloy 800 and Incoloy H/HT. It generally covers seamless ASME SB 407 pipe, either hot-finished or cold-finished.
ASTM B407 UNS N08811 is a nickel-iron-chromium alloy tubing designed for high-temperature and corrosive environments. Commonly referred to as 800HT alloy, it is a high-performance material with excellent resistance to oxidation, carburization, and other forms of high-temperature corrosion. Seamless tubing ensures superior mechanical properties and structural integrity even under demanding conditions.
Chemical Composition of ASTM B407 UNS N08811 Nickel Alloy Tubes (Weight %)
| Element | Content (Min - Max) |
|---|---|
| Nickel (Ni) | 30.00 - 35.00 |
| Copper (Cu) | ≤ 0.75 |
| Iron (Fe) | ≥ 39.50 |
| Manganese (Mn) | ≤ 1.50 |
| Carbon (C) | 0.06 - 0.10 |
| Silicon (Si) | ≤ 1.00 |
| Sulfur (S) | ≤ 0.015 |
| Chromium (Cr) | 19.00 - 23.00 |
| Aluminum (Al) | 0.15 - 0.60 |
| Titanium (Ti) | 0.15 - 0.60 |
Mechanical Properties of ASTM B407 UNS N08811 Nickel Alloy Tubes
| Condition | Tensile Strength (MPa, min) | Yield Strength (MPa, min) | Elongation (%, min) |
|---|---|---|---|
| Hot-finished Annealed | 450 | 170 | 30 |
| Cold-worked Annealed | 450 | 170 | 30 |
Key Features of ASTM B407 UNS N08811 Seamless Tubing:
High-Temperature Resistance: N08811 alloy exhibits excellent thermal stability, making it well-suited for long-term exposure to high temperatures up to 593°C (1100°F) and above.
Corrosion Resistance: Even in extreme environments such as chemical processing plants, the alloy offers excellent resistance to oxidation, carburization, and sulfidation.
Mechanical Strength: Enhanced mechanical properties are achieved through the addition of controlled levels of titanium (Ti) and aluminum (Al), ensuring excellent creep and stress-rupture strength. Seamless Construction: The seamless manufacturing process ensures uniformity of the pipe, eliminates weak points, and provides greater strength and reliability than welded pipe.
Petrochemical Industry Applications
Process Equipment: Used in process equipment in chemical and petrochemical plants, particularly for ethylene production.
Heat Treatment Equipment: Its high-temperature resistance makes it suitable for heat treatment units and equipment.
Furnace and Heat Exchanger Manufacturing: Incoloy 800HT is used in the manufacture of furnaces and heat exchangers.
Furnace Components: It is also suitable for components that must withstand high temperatures and corrosive environments.
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.
