ASME SB407 UNS N08811 High-temperature industrial piping
ASME SB407 UNS N08811 High-temperature industrial piping
ASME SB407 UNS N08811 (Incoloy 800HT) pipe is a nickel-iron-chromium alloy designed for high-temperature industrial piping applications requiring excellent creep and rupture resistance. This material is a high-performance, heat-resistant alloy suitable for extreme environments.
What is the temperature range of INCOLOY 800H?
800H alloy is a carbon-controlled alloy that has been solution heat treated (2100°F/1150°C) to improve its high-temperature properties. It exhibits improved creep and stress-rupture properties in the temperature range of 1100°F (593°C) to 1800°F (982°C).
Chemical Requirements for UNS N08811 Tube
Element | Nickel | Chromium | Iron | Manganese, max | Carbon | Copper | Silicon | Sulfur, max | Aluminum | Titanium |
Composition Limits, % | 30 min – 35 max | 19 min – 23 max | 36.5 min | 1.5 | – | 0.75 | 1 | 0.015 | 0.15 min – 0.60max | 0.15 min – 0.60max |
Mechanical Properties of UNS N08811 Pipe
Alloy | Condition (Temper) | Tensile Strength | Yield Strength (0.2 % offset, min) | Elongation in 2 in. or 50 mm (0.8 in.), min |
UNS N08811 | hot - finished annealed or cold - worked annealed | 65,000 (450) psi (MPa) | 25,000 (170) psi (MPa) | 30 |
UNS N08811 High-temperature industrial piping Pipe Schedules
Normal Pipe Size | Outside Diameter | Schedule No. 5 | Schedule No. 10 | Schedule No. 40 | Schedule No. 80 |
Inches | |||||
1/4 | 0.54 | -- | 0.065 | 0.088 | -- |
3/8 | 0.675 | -- | 0.065 | 0.091 | 0.126 |
1/2 | 0.84 | 0.065 | 0.083 | 0.109 | 0.147 |
3/4 | 1.05 | 0.065 | 0.083 | 0.113 | 0.154 |
1 | 1.315 | 0.065 | 0.109 | 0.133 | 0.179 |
1 1/4 | 1.66 | 0.065 | 0.109 | 0.14 | 0.191 |
1 1/2 | 1.9 | 0.065 | 0.109 | 0.145 | 0.2 |
2 | 2.375 | 0.065 | 0.109 | 0.154 | 0.218 |
2 1/2 | 2.875 | 0.083 | 0.12 | 0.203 | 0.276 |
3 | 3.5 | 0.083 | 0.12 | 0.216 | 0.3 |
3 1/2 | 4 | 0.083 | 0.12 | 0.226 | 0.318 |
4 | 4.5 | 0.083 | 0.12 | 0.237 | 0.337 |
5 | 5.563 | -- | -- | 0.258 | -- |
6 | 6.625 | -- | -- | 0.28 | -- |
Millimetres | |||||
6.35 | 13.72 | -- | 1.65 | 2.24 | -- |
9.52 | 17.14 | -- | 1.65 | 2.31 | 3.2 |
12.7 | 21.34 | 1.65 | 2.11 | 2.77 | 3.73 |
19.05 | 26.67 | 1.65 | 2.11 | 2.87 | 3.91 |
25.4 | 33.4 | 1.65 | 2.77 | 3.38 | 4.55 |
31.8 | 42.16 | 1.65 | 2.77 | 3.56 | 4.85 |
38.1 | 48.26 | 1.65 | 2.77 | 3.68 | 5.08 |
50.8 | 60.32 | 1.65 | 2.77 | 3.91 | 5.54 |
63.5 | 73.02 | 2.11 | 3.05 | 5.16 | 7.04 |
76.2 | 88.9 | 2.11 | 3.05 | 5.49 | 7.62 |
88.9 | 101.6 | 2.11 | 3.05 | 5.74 | 8.08 |
101.6 | 114.3 | 2.11 | 3.05 | 6.02 | 8.56 |
127.0 | 141.3 | -- | -- | 6.55 | -- |
152.4 | 168.28 | -- | -- | 7.11 | -- |
Manufacturing and Testing
UNS N08811 pipe is manufactured seamlessly according to ASME SB407/ASTM B407 specifications and undergoes hot finishing or cold working. It undergoes a series of tests to ensure quality and reliability, including:
Hydrostatic testing: used to verify pressure vessels.
Nondestructive eddy current testing: used to detect defects.
Tensile testing: used to verify mechanical properties.
Grain size measurement: used to confirm the correct microstructure for high-temperature performance.
Applications
UNS N08811's robust performance makes it an ideal choice for high-temperature industrial applications, including:
Furnace components and fixtures: used for heat treating and other high-temperature processes.
Heat exchangers: used to transfer heat in harsh thermal environments.
Chemical and petrochemical processing: used to handle corrosive and high-temperature media.
Power generation: used for steam generator tubes and process piping.
Gnee Steel specializes in the production of various nickel-based alloys. Gnee Steel's product packaging includes steel strapping: Pipes with an outer diameter of 3 inches or less are typically strapped together with polypropylene film to prevent rust during sea transportation, and then secured with steel strapping. Wooden boxes/crates: Pipes are typically packaged in wooden boxes or crates to protect them during transportation, especially those that are longer or have larger diameters. Seaworthy export packaging: Suppliers typically use standard seaworthy export packaging methods, which may include a variety of materials and techniques to protect the pipes during transportation. Tarpaulin packaging: This prevents rain, seawater, and other external factors from penetrating the export wooden crates during transportation. Gnee Steel specializes in the production and sale of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, power, automotive, and nuclear energy industries, and we can provide customized alloy material solutions based on customer needs. For alloy material pricing inquiries or customized alloy material solutions, please contact us for a quote at ss@gneesteel.com.
