ASME SB407 UNS N08811 High Temperature Industrial Pipe
ASME SB407 UNS N08811 High Temperature Industrial Pipe
ASME SB407 UNS N08811, also known as Alloy 800HT Tubing, is a high-nickel, high-chromium alloy designed for high-temperature industrial applications above 593°C (1100°F). Its chemical properties provide excellent resistance to creep, rupture, oxidation, carburization, and nitriding. This seamless tubing is widely used in critical industries such as power generation, chemical, and petrochemical industries to manufacture components such as process piping, heat exchangers, and furnace components.
What are the specifications for Incoloy 800 alloy?
Incoloy 800HT alloy has a chemical composition within the range of 800H alloy and requires a heat treatment temperature of at least 2100°F (1149°C). Its carbon content ranges from 0.06% to 0.10% (compared to 0.05% to 0.10% for 800H alloy), and its aluminum and titanium content ranges from 0.85% to 1.20% (compared to 0.30% to 1.20% for 800H alloy).
Chemical Requirements for UNS N08811
|
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 and Tube
|
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 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 |
-- |
Common Applications
Chemical and Petrochemical Industries: Used in process piping, heat exchangers, and furnace components exposed to corrosive and high-temperature environments.
Power Generation Industry: Used in various high-temperature structural components in power plants.
Other Industries: Also used in natural gas processing, offshore drilling, specialty chemicals, and the pulp and paper industry.
Technical Standards
ASTM B407: This specification covers the material requirements for seamless nickel-iron-chromium alloy pipe, including UNS N08811.
ASME SB407: This is an ASME standard for the same material; the "SB" designation indicates it is the ASME Boiler and Pressure Vessel Code.
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. We also offer customized alloy solutions tailored to customer needs. For alloy pricing inquiries or customized alloy solutions, please contact us for a quote at ss@gneesteel.com.
