Product Overview –Incoloy 800 / 800H / 800HT Tubes
Incoloy 800, Incoloy 800H, and Incoloy 800HT Tubes are premium nickel-iron-chromium alloy tubes developed for high-temperature service where outstanding oxidation resistance, carburization resistance, creep strength, and structural stability are essential. These alloys are widely used in industries operating under continuous thermal exposure, including petrochemical plants, power generation facilities, refineries, fertilizer plants, and industrial furnace systems.
While all three grades share similar corrosion resistance, each is engineered for different operating conditions. Incoloy 800 (UNS N08800) offers excellent general corrosion resistance and oxidation resistance. Incoloy 800H (UNS N08810) contains controlled carbon for improved creep rupture strength at elevated temperatures, whereas Incoloy 800HT (UNS N08811) provides even greater creep resistance through controlled carbon, aluminum, and titanium content, making it suitable for prolonged service at temperatures exceeding 600°C.
These tubes are widely installed in heat exchangers, superheaters, reheaters, steam generators, reformer tubes, ethylene cracking furnaces, chemical processing plants, pressure vessels, thermal processing equipment, and power generation systems.
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As a trusted supplier, exporter, and stockist of Incoloy 800 / 800H / 800HT Tubes,we serve customers across the UAE, Saudi Arabia, Qatar, Oman, Kuwait, Bahrain, India, Africa, Europe, and Southeast Asia, delivering quality products, competitive pricing, and reliable logistics for industrial and infrastructure projects.
Material Specification -Incoloy 800 / 800H / 800HT Tubes
Technical Specifications –Incoloy 800 / 800H / 800HT Tubes
| Outside Diameter: | 6.35 mm to 114.3 mm |
| Wall Thickness: | 0.5 mm to 12 mm |
| Length: | Up to 18 Meters & Custom Length |
| Pipe Ends: | Plain End, Annealed Ends |
| Product Type | Seamless & Welded Pipes |
| Surface Finish: | Bright Annealed, Pickled, Polished |
| ASTM Seamless : | ASTM B407 |
| ASTM Welded: | ASTM B514 / ASTM B515 |
| Alloy Family: | Nickel-Iron-Chromium Alloy |
| Available Sizes: | ¼", ⅜", ½", ⅝", ¾", 1", 1¼", 1½", 2", 2½", 3", 4" |
Custom lengths and project-specific sizes are available on request.
Third Party Inspection Available
All specifications are in accordance of Incoloy 800 / 800H / 800HT Tubes. Mechanical and chemical values are as per standard limits. Mill Test Certificates (MTC) available upon request.
Chemical Composition –Incoloy 800 / 800H / 800HT Tubes
(As per ASTM specification)
| Element | Incoloy 800 | Incoloy 800H | Incoloy 800HT |
|---|---|---|---|
| Nickel (Ni) | 30.00–35.00% | 30.00–35.00% | 30.00–35.00% |
| Chromium (Cr) | 19.00–23.00% | 19.00–23.00% | 19.00–23.00% |
| Iron (Fe) | Balance | Balance | Balance |
| Carbon (C) | ≤ 0.10% | 0.05–0.10% | 0.06–0.10% |
| Aluminium + Titanium (Al + Ti) | 0.30–1.20% | 0.30–1.20% | 0.85–1.20% |
| Silicon (Si) | ≤ 1.00% | ≤ 1.00% | ≤ 1.00% |
| Manganese (Mn) | ≤ 1.50% | ≤ 1.50% | ≤ 1.50% |
| Sulphur (S) | ≤ 0.015% | ≤ 0.015% | ≤ 0.015% |
| Copper (Cu) | ≤ 0.75% | ≤ 0.75% | ≤ 0.75% |
Note: The controlled nickel, chromium, carbon, aluminum, and titanium content provides excellent resistance to oxidation, carburization, creep, and thermal fatigue. Incoloy 800HT offers the highest creep rupture strength among the three grades.
Mechanical Properties of Incoloy 800 / 800H / 800HT Tubes
| Element | Incoloy 800 | Incoloy 800H | Incoloy 800HT |
|---|---|---|---|
| Tensile Strength | ≥520 MPa | ≥450 MPa | ≥450 MPa |
| Yield Strength | ≥205 MPa | ≥170 MPa | ≥170 MPa |
| Elongation | ≥30% | ≥30% | ≥30% |
| Hardness | ≤170 HB | ≤170 HB | ≤170 HB |
| Density | 7.94 g/cm³ | 7.94 g/cm³ | 7.94 g/cm³ |
| Melting Range | 1357–1385°C | 1357–1385°C | 1357–1385°C |
Note :While Incoloy 800 offers higher room-temperature strength, Incoloy 800H and 800HT are specifically designed to provide superior creep resistance and long-term stability at elevated temperatures.
Why Choose Incoloy 800 / 800H / 800HT Tubes?
Applications of Incoloy 800 / 800H / 800HT Tubes
Where Incoloy 800 / 800H / 800HT Tubes are used:
- 🔸Heat Exchanger Tubes
- 🔸Boiler Tubes
- 🔸Combustion Chambers
- 🔸Condenser Tubes
- 🔸Steam Superheaters
- 🔸Pressure Vessels
- 🔸Mining Equipment
- 🔸Furnace Components
- 🔸Decorative Steel Projects
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Key Advantages of Incoloy 800 / 800H / 800HT Tubes
Best Alternatives to Incoloy 800 / 800H / 800HT Tubes
- This process provides:
- 🔸 Better oxidation resistance at extremely high temperatures
- 🔸 Excellent resistance to thermal cycling
- 🔸 Suitable for furnace environments
Best for:Heat treatment plants, industrial furnaces, thermal processing, and high-temperature oxidation applications.
- 🔸 Excellent corrosion resistance
- 🔸 Good oxidation resistance
- 🔸 Reliable performance in chemical processing
Best for: Heat exchangers, chemical plants, and general high-temperature industrial service.
- 🔸 Excellent oxidation resistance
- 🔸 Good high-temperature strength
- 🔸 More economical than nickel alloys
Best for: Industrial furnaces, boilers, heat exchangers, and moderate high-temperature applications where cost efficiency is important..