Incoloy 800H pipe is a high-performance alloy known for its excellent resistance to oxidation, corrosion, and high-temperature environments. It is a variation of the Incoloy 800 series, with enhanced creep strength and a higher content of carbon (up to 0.05%) to improve its high-temperature stability and mechanical properties at elevated temperatures.
The Incoloy 800H pipe series of alloys offer good strength retention under exposure to extremely corrosive and high temperature environments along with having good creep and rupture strength. They have found wide usage in chemical plants, refineries and power generation facilities.
What is 800H material?
Alloy 800H is a nickel-chromium-iron alloy that’s resistant to oxidation, carburization, and corrosion at high temperatures. It’s used in a variety of industries, including power generation and furnace manufacturing. Fe 39.5% min. Ni 30-35% Cr 19-23% Al+Ti .
Composition
Alloy 800H has a nominal composition of Fe 39.5% min. Ni 30-35% Cr 19-23% Al+Ti .
It has a higher level of carbon than the base alloy 800
Alloy 800HT is similar to Alloy 800H, but with a more restricted aluminum and titanium content
Properties
Alloy 800H and 800HT are more resistant to oxidation and carburization than the base alloy 800
They have enhanced creep and stress rupture properties
They’re considered to be superior to the base alloy 800
Applications
Alloy 800H and 800HT are used in heat-treating furnaces, power generation, and gas-cooled nuclear reactors
They’re specifically designed for applications that require prolonged exposure to extreme heat
What is Incoloy made of?
Incoloy is a nickel-iron-chromium alloy that also contains other elements like molybdenum, copper, titanium, and aluminum.
Composition
Nickel: The primary component of Incoloy, which protects against chloride-ion stress-corrosion cracking
Chromium: Provides resistance to oxidizing environments
Molybdenum: Helps resist pitting and crevice corrosion
Copper: Along with nickel and molybdenum, helps resist reducing chemicals
Titanium and aluminum: Strengthen the alloy during heat treatment
Properties
Incoloy is a superalloy that can withstand high temperatures and resist oxidation and corrosion
Incoloy is easy to fabricate using the same machines and processes as stainless steel
Incoloy has good mechanical properties from cryogenic temperatures to moderately high temperatures
Incoloy 800H pipe Specification
| Specification | ASTM B163 / ASTM B407 / ASTM B423 / ASME SB163 / ASME SB407 / ASME SB423 |
| Grades | INCOLOY 800 / INCOLOY 800H / INCOLOY 800HT / INCOLOY 825 / UNS NO8800 / UNS NO8810 / UNS NO8811 / UNS NO8825 |
| Type | Cold Drawn Seamless / Welded / ERW |
| Outer Diameter Size | Seamless – 1/4″ NB to 6″ NB (Nominal Bore Size) |
| Welded / ERW- 1″ NB to 16″ NB (Nominal Bore Size) | |
| Wall Thickness | Schedule 10 to Schedule 160 |
| Length | 5 to 7 Meters, 09 to 13 Meters, Single Random Length, Double Random Length And Customize Size. |
| Ends | Plain Ends / Beveled Ends |
Standard Scope
This specification covers UNS N08120, UNS N08800, UNS N08801, UNS N08810, UNS N08811, UNS N08890, and UNS N06811 in the form of cold-worked and hot-finished annealed seamless pipe and tube. Alloys UNS N08800 and UNS N06811 are normally employed in service temperatures up to and including 1100°F (593°C). Alloys UNS N08120, UNS N08810, UNS N08811, and UNS N08890 are normally employed in service temperatures above 1100°F (593°C) where resistance to creep and rupture is required, and they are annealed to develop controlled grain size for optimum properties in this temperature range.
Materials and Manufacture
Heat Treatment—The final heat treatment of UNS N08120 shall be 2150°F (1177°C) minimum, UNS N08810,2050°F (1121°C) minimum, UNS N08811, UNS N08890, 2100°F (1149°C) minimum, and UNS N06811, 1920°F (1050°C) minimum.
Chemical Composition
The material shall conform to the composition limits specified in Table 1.
If a product (check) analysis is performed by the purchaser, the material shall conform to the product (check) analysis variations in Specification B 880.
| CHEMICAL | LIMITS | C | Mn | Fe | S | Si | Cr | Ni | Al-Ti |
| Incoloy 800H | MIN | 0.05 | 39.5 | 19 | 30 | 0.15 | |||
| MAX | 0.1 | 1.5 | 0.015 | 1.0 | 23 | 35 | 0.6 |
Mechanical Properties
Mechanical Properties—The material shall conform to the mechanical properties specified in Table 2.
| TABLE 2 Mechanical Properties of Pipe and Tube | ||||
| Alloy | Condition (Temper) | Tensile Strength, min, psi (MPa) | Yield Strength, (0.2 % offset), min, psi (MPa) | Elongation in 2 in. or 50 mm (or 4D), min,% |
| UNS N08810 and UNS N08811 | hot-finished annealed or cold-worked annealed | 65 000 (450) | 25 000 (170) | 30 |
What is the equivalent of Incoloy 800H pipe?
| GRADE | WERKSTOFF NR. / DIN | UNS | JIS | BS | GOST | AFNOR | EN | OR |
| Incoloy 800H | 1.4958 / 1.4876 | N08810 | NCF 800H | NA 15(H) | ЭИ670 | Z8NC33-21 | X5NiCrAlTi31-20 | XH32T |
Alloy 800H Pipe Permissible Variations and Dimension
Permissible Variations in Outside and Inside Diameter and Wall Thickness (Average Wall)
| Specified Outside Diameter or Calculated Nominal Outside Diameter (When Ordered to Inside Diameter and Average Wall) | Permissible Variations | |||
| Outside Diameter or Inside Diameter | Wall Thickness,% | |||
| + | − | + | − | |
| Cold-FinishedA ,B,C,D Pipe and Tube | ||||
| Inches | ||||
| 0.500 to 5⁄8 , excl | 0.005 | 0.005 | 15.0 | 15.0 |
| 5⁄8 to 11⁄2 , incl | 0.0075 | 0.0075 | 10.0 | 10.0 |
| Over 11⁄2 to 31⁄2 , incl | 0.01 | 0.01 | 10.0 | 10.0 |
| Over 31⁄2 to 41⁄2 , incl | 0.015 | 0.015 | 10.0 | 10.0 |
| Over 41⁄2 to 6, incl | 0.02 | 0.02 | 12.5 | 12.5 |
| Over 6 to 65⁄8 , incl | 0.025 | 0.025 | 12.5 | 12.5 |
| Millimetres | ||||
| 12.7 to 15.8, excl | 0.127 | 0.127 | 15.0 | 15.0 |
| 15.8 to 38.1, incl | 0.19 | 0.19 | 10.0 | 10.0 |
| Over 38.1 to 88.9, incl | 0.254 | 0.254 | 10.0 | 10.0 |
| Over 88.9 to 114.3, incl | 0.381 | 0.381 | 10.0 | 10.0 |
| Over 114.3 to 152.4, incl | 0.508 | 0.508 | 12.5 | 12.5 |
| Over 152.4 to 168.3, incl | 0.635 | 0.635 | 12.5 | 12.5 |
| Hot-Finished TubeE, F, G,H | ||||
| Inches | ||||
| 21⁄2 to 51⁄2 , excl | 0.031 | 0.031 | 12.5 | 12.5 |
| 51⁄2 to 91⁄4 , incl | 0.047 | 0.047 | 12.5 | 12.5 |
| Millimetres | ||||
| 63.5 to 139.7, excl | 0.787 | 0.787 | 12.5 | 12.5 |
| 139.7 to 234.9, incl | 1.19 | 1.19 | 12.5 | 12.5 |
Pipe Schedule
| Nominal Pipe Size | Outside Diameter | Nominal Wall Thickness | |||
| Schedule No. 5 | Schedule No. 10 | Schedule No. 40 | Schedule No. 80 | ||
| Inches | |||||
| 1⁄4 | 0.540 | … | 0.065 | 0.088 | … |
| 3⁄8 | 0.675 | … | 0.065 | 0.091 | 0.126 |
| 1⁄2 | 0.840 | 0.065 | 0.083 | 0.109 | 0.147 |
| 3⁄4 | 1.050 | 0.065 | 0.083 | 0.113 | 0.154 |
| 1 | 1.315 | 0.065 | 0.109 | 0.133 | 0.179 |
| 11⁄4 | 1.660 | 0.065 | 0.109 | 0.140 | 0.191 |
| 11⁄2 | 1.900 | 0.065 | 0.109 | 0.145 | 0.200 |
| 2 | 2.375 | 0.065 | 0.109 | 0.154 | 0.218 |
| 21⁄2 | 2.875 | 0.083 | 0.120 | 0.203 | 0.276 |
| 3 | 3.500 | 0.083 | 0.120 | 0.216 | 0.300 |
| 31⁄2 | 4.000 | 0.083 | 0.120 | 0.226 | 0.318 |
| 4 | 4.500 | 0.083 | 0.120 | 0.237 | 0.337 |
| 5 | 5.563 | … | … | 0.258 | … |
| 6 | 6.625 | … | … | 0.280 | … |
| Millimetres | |||||
| 6.35 | 13.72 | … | 1.65 | 2.24 | … |
| 9.52 | 17.14 | … | 1.65 | 2.31 | 3.20 |
| 12.70 | 21.34 | 1.65 | 2.11 | 2.77 | 3.73 |
| 19.05 | 26.67 | 1.65 | 2.11 | 2.87 | 3.91 |
| 25.4 | 33.40 | 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 | 88.90 | 2.11 | 3.05 | 5.49 | 7.62 |
| 88.9 | 101.60 | 2.11 | 3.05 | 5.74 | 8.08 |
| 101.6 | 114.30 | 2.11 | 3.05 | 6.02 | 8.56 |
| 127.0 | 141.30 | … | … | 6.55 | … |
| 152.4 | 168.28 | … | … | 7.11 | … |
What is the difference between Incoloy 800 and 800H?
The main difference between Incoloy 800 and Incoloy 800H lies in their composition and performance characteristics, specifically with respect to high-temperature strength and creep resistance.
Creep Strength and High-Temperature Stability:
Incoloy 800: While Incoloy 800 is a heat-resistant alloy and offers good oxidation resistance, it does not have the enhanced creep strength required for some high-temperature applications.
Incoloy 800H: Incoloy 800H is specifically designed to have improved creep strength at high temperatures (typically above 1000°F or 537°C). It is better suited for applications involving prolonged exposure to elevated temperatures, such as in high-temperature reactors or turbine components.
Nickel Content:
Incoloy 800: Contains 30-35% nickel, providing good resistance to oxidation and carburization.
Incoloy 800H: Has the same nickel content as Incoloy 800 (around 30-35%), but the difference is the higher carbon content and modified heat treatment, which enhances its stability under prolonged stress at high temperatures.
Temperature Range:
Incoloy 800: Suitable for applications up to around 1100°F (593°C), typically used in environments where the temperature doesn’t exceed the alloy’s limits for strength and corrosion resistance.
Incoloy 800H: Performs better in higher temperature environments, often used for applications requiring extended high-temperature exposure, like reactors, heat exchangers, and gas turbines operating at temperatures exceeding 1100°F (593°C).+
Heat Treatment:
Incoloy 800: Can be heat-treated to improve its strength, but it doesn’t have the same level of heat resistance as Incoloy 800H without further modifications.
Incoloy 800H: Specifically heat-treated for improved high-temperature strength and creep resistance, making it suitable for applications requiring long-term thermal stability.
Summary of Differences:
| Feature | Incoloy 800 | Incoloy 800H |
| Carbon Content | 0.05% to 0.10% | Controlled carbon content up to 0.05% |
| Creep Strength | Moderate at high temperatures | Enhanced creep strength at high temperatures |
| Temperature Range | Up to 1100°F (593°C) | Better performance at higher temperatures |
| Applications | Furnace parts, heat exchangers, etc. | High-temperature reactors, turbines, etc. |
| Strength at High Temperatures | Standard high-temperature strength | Higher strength and creep resistance at high temperatures |
In essence, Incoloy 800H is a more advanced version of Incoloy 800, designed specifically for high-temperature applications where long-term stability and resistance to creep are critical.
ASTM B407 Incoloy 800H Pipes Application
- Phosphoric acid evaporators
- Pickling tank heaters, pickling tanks and equipment
- Chemical process equipment
- Propellor shafts
- Electrostatic precipitator electrodes
- Hot vessels for food, water and seawater,
- Expansion bellows
- Marine exhaust systems
- Industrial furnaces
- Heat-treating equipment
- Chemical and petrochemical processing
- Super-heater and re-heaters in power plants
- Pressure vessels
You can get an offer for products in below material forms:
- Pipe and Tube (EN 10216-5, ASTM A213, ASTM A249, A312, A790,)
- Forged Fitting and Flange (ASTM A182 , ASTM A105,ASTM B564 )
- Butt Weld Fittings (ASTM A234, ASTM A403,ASTM A815)
- Round bar , Billet (ASTM A276, ASTM A479)
- Plate, Sheet, Strip(ASTM A240, EN 10028-7, A480)
- Bolting, Nuts（ASTM A193, A194, A320）
Incoloy 800H pipe Exported Countries
We Export Incoloy 800H pipe to Saudi Arabia, United Arab Emirates, Qatar, Bahrain, Oman, Kuwait, Turkey, Egypt, Yemen , Syria, Jordan, Cyprus, Singapore, Malaysia, Indonesia, Thailand, Vietnam, South Korea, Japan, Sri Lanka, Maldives, Bangladesh, Cambodia, Argentina, Bolivia, Brazil, Venezuela, Colombia, Ecuador, Guyana, Paraguay, Uruguay, United States Of America, Canada, Mexico, Panama, Jamaica, Bahamas, Denmark, Norway, Germany, France,Italy, United Kingdom, Spain, Belgium, Greece, Czech Republic, Portugal, Hungary, Albania, Austria, Finland, Ireland, Croatia, Malta, Nigeria, Algeria, Angola, South Africa, Libya, Egypt, Sudan, Europe, Africa, Asia, North America, South America, Middle East.etc