ASTM B407 Alloy 800HT / UNS N08811 Seamless Nickel Alloy Steel Pipe
ASTM B407 UNS N08811 DIN 1.4959 / INCOLOY 800HT SEAMLESS ALLOY STEEL PIPE
Alloy 800HT are high-performance alloys that belong to the Incoloy family, which are nickel-chromium-iron alloys known for their excellent high-temperature strength and oxidation resistance. It is known for its excellent resistance to oxidation and carburization, making it ideal for applications in high-temperature environments.
Here are some key characteristics of Alloy 800HT seamless tube:
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High-Temperature Strength: Alloy 800HT maintains strength at elevated temperatures, making it suitable for use in furnace applications and heat exchangers.
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Oxidation and Carburization Resistance: The alloy's high nickel and chromium content provide substantial resistance to oxidation and carburization, extending its lifespan in harsh environments.
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Corrosion Resistance: While it is not completely immune to corrosion, Alloy 800HT offers good resistance against various corrosive media, particularly in high-temperature conditions.
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Fabricability: The alloy can be easily processed through a variety of methods, including welding, machining, and forming, allowing for versatile usage.
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Thermal Stability: It shows good stability across a range of temperatures, which is essential for applications that experience fluctuating temperatures.
800 / 800H / 800HT Incoloy Pipes Equivalent Grades
| STANDARD | WERKSTOFF NR. | UNS | JIS | BS | GOST | AFNOR | EN | OR |
| Incoloy 800 | 1.4876 | N08800 | NCF 800 | NA 15 | ЭИ670 | Z8NC32-21 | X10NiCrAlTi32-20 | XH32T |
| Incoloy 800H | 1.4958 / 1.4876 | N08810 | NCF 800H | NA 15(H) | ЭИ670 | Z8NC33-21 | X5NiCrAlTi31-20 | XH32T |
| Incoloy 800HT | 1.4859 / 1.4876 | N08811 | NCF 800HT | NA 15(HT) | ЭИ670 | – | X8NiCrAlTi32-21 | XH32T |
ASTM B407 Incoloy 800H/HT Seamless Alloy Steel Pipes Chemistry Composition
|
Ni, % |
Cu, %
|
Fe, %
|
Mn, %
|
C, %
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Si, %
|
S, %
|
Cr, %
|
Al, %
|
Ti, %
|
|
30.0-35.0
|
0.75 max
|
39.5 min
|
1.50 max
|
0.06-0.10
|
1.00 max
|
0.015 max
|
19.0-23.0
|
0.15-0.60
|
0.15-0.60
|
ASTM B407 Incoloy 800H/HT Seamless Alloy Steel Pipes Mechanical Properties
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Tensile Strength , MPa
|
Yield Strength, MPa
|
Elongation, %
|
|
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450 min
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170 min
|
30 min
|
Hot-finished Annealed
|
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450 min
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170 min
|
30 min
|
Cold-worked Annealed
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Outside Diameter & Tolerance
|
|
Outside Diameter, mm
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Tolerance, mm
|
|
Cold-Finished
|
12.7≤OD＜15.8
|
±0.127
|
|
15.8＜OD≤38.1
|
±0.19
|
|
|
38.1＜OD≤88.9
|
±0.254
|
|
|
88.9＜OD≤114.3
|
±0.381
|
|
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114.3＜OD≤152.4 |
±0.508
|
|
|
152.4＜OD≤168.3
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±0.635
|
|
|
Hot-Finished
|
63.5≤OD＜139.7
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±0.787
|
|
139.7≤OD≤234.9
|
±1.19
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Wall thickness & Tolerance
|
|
Outside Diameter, mm |
Tolerance, % |
|
|
Average Wall |
Minimum Wall |
||
|
Cold-Finished |
12.7≤OD＜15.8 |
±15.0 |
- |
|
15.8＜OD≤38.1 |
±10.0 |
- |
|
|
38.1＜OD≤88.9 |
±10.0 |
- |
|
|
88.9＜OD≤114.3 |
±10.0 |
- |
|
|
114.3＜OD≤152.4 |
±12.5 |
- |
|
|
152.4＜OD≤168.3 |
±12.5 |
- |
|
|
Hot-Finished |
63.5≤OD＜139.7 |
±12.5 |
+28.5/-0 |
|
139.7≤OD≤234.9 |
±12.5 |
+28.5/-0 |
|
Application
- Ethylene furnace quench boilers
- Hydrocarbon cracking
- Valves, fittings and other components exposed to corrosive attack from 1100-1800° F
- Industrial furnaces
- Heat-treating equipment
- Chemical and petrochemical processing
- Super-heater and re-heaters in power plants
- Pressure vessels
- Heat exchangers
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