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Product Overview
Introduction To Incoloy 800H / 800HT / UNS N08810 /N08811
INCOLOY 800H and 800HT are high-performance alloys designed for superior strength and corrosion resistance in high-temperature environments. These alloys are modifications of INCOLOY 800, specifically developed to improve creep and stress rupture properties at elevated temperatures.
INCOLOY 800H (UNS N08810) and 800HT (UNS N08811) offer excellent resistance to oxidation, carburization, and sulfidation. Their enhanced mechanical properties make them ideal for structural components exposed to long-term high-heat conditions. With controlled carbon, aluminum, and titanium contents, these alloys maintain their strength and metallurgical stability even above 600°C (1110°F), making them a top choice in heat-treating, petrochemical, and power generation sectors.
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INCOLOY® 800H / 800HT Specifications (UNS N08810 / N08811)
| Category | Details |
|---|---|
| Grade | INCOLOY® 800H / 800HT / UNS N08810 / N08811 |
| Type | Nickel-Iron-Chromium High-Temperature Alloy |
| Typical Chemical Composition | Ni 30–35%, Fe 39–45%, Cr 19–23%, C ≤ 0.10%, Mn ≤ 1%, Si ≤ 1%, Cu ≤ 0.5%, Al ≤ 0.5%, Ti ≤ 0.5% |
| Conditions | Annealed, Hot Rolled, Solution Treated |
| Heat Treatment | Annealing, Stress Relieving |
| Testing | Tensile, Hardness, Chemical, Corrosion, NDT on request |
| Certification | EN 10204 3.1 / 3.2 (Mill Test Certificate available) |
Chemical Composition of INCOLOY® 800H / 800HT
| Element | 800H | 800HT |
|---|---|---|
| Nickel (Ni) | 30.0 – 35.0 | 30.0 – 35.0 |
| Chromium (Cr) | 19.0 – 23.0 | 19.0 – 23.0 |
| Iron (Fe) | 39.5 min. | 39.5 min. |
| Carbon (C) | 0.05 – 0.10 | 0.06 – 0.10 |
| Aluminum (Al) | 0.15 – 0.60 | 0.25 – 0.60 |
| Titanium (Ti) | 0.15 – 0.60 | 0.25 – 0.60 |
| Al + Ti | 0.30 – 1.20 | 0.85 – 1.20 |
| ASTM Grain Size | 5 or coarser | 5 or coarser |
Mechanical Properties of Incoloy 800H / 800HT (Annealed)
| Temperature | Tensile Strength (MPa) | Yield Strength (MPa) | Hardness (BHN) |
|---|---|---|---|
| 25 °C (80 °F) | 379 | 207 | 145 |
| 425 °C (800 °F) | ~207 | ~124 | ~100 |
| 540 °C (1000 °F) | ~172 | ~103 | ~90 |
| 650 °C (1200 °F) | ~138 | ~83 | ~85 |
| 705 °C (1300 °F) | ~124 | ~69 | ~80 |
| 760 °C (1400 °F) | ~117 | ~62 | ~75 |
Products in Incoloy 800H / 800HT
Incoloy 800H / 800HT, are high-performance, high-temperature austenitic alloys designed for exceptional structural stability and oxidation resistance in demanding environments. These alloys, known for their superior creep and stress rupture strength, are widely used in industries such as petrochemical processing, power generation, and heat treatment. Supplied in a wide variety of product forms, INCOLOY® 800H/800HT meets numerous international standards and specifications, making them suitable for critical applications in extreme service conditions.
This alloy meets several recognized industry standards, including:
Uses and Advantages
Excellent strength and creep resistance at elevated temperatures
Outstanding resistance to oxidation, carburization, and sulfidation
Stable metallurgy and corrosion resistance in high-temperature chemical exposure
Good weldability and formability
Long service life in extreme industrial environments
Applications of INCOLOY 800H / 800HT
INCOLOY 800H / 800HT is a high-temperature alloy widely used across industries where long-term strength, metallurgical stability, and resistance to oxidation and carburization are critical. Designed for elevated-temperature service, these alloys are ideal for structural and pressure-bound components exposed to prolonged thermal exposure and corrosive gases.
Chemical Processing
Oil & Gas
Marine
Pharmaceutical
Heat Exchangers
Power Plants
WHY CHOOSE US?
FAQ's
What are Incoloy 800H and 800HT alloys?
Incoloy 800H (UNS N08810) and Incoloy 800HT (UNS N08811) are high-performance nickel iron chromium alloys specifically developed to enhance creep strength and stress rupture resistance in high-temperature environments. They are modified versions of Incoloy 800, engineered with controlled carbon, aluminum, and titanium levels to deliver excellent metallurgical stability and long-term strength above 600°C, making them ideal for extreme industrial applications.
What are the key properties of Incoloy 800H and 800HT?
Both Incoloy 800H and 800HT offer excellent resistance to oxidation, carburization, and sulfidation under prolonged exposure to elevated temperatures. These alloys provide superior creep resistance, reliable structural integrity, and stable mechanical properties in aggressive chemical and thermal environments. Their good weldability and formability further increase their suitability for demanding high-temperature applications.
Where are Incoloy 800H and 800HT commonly used?
Incoloy 800H and 800HT are widely used across industries requiring long-term strength and corrosion resistance at elevated temperatures. Typical applications include heat treatment equipment, petrochemical furnaces, reformer tubes, superheaters, boiler components, nuclear reactor supports, chemical processing plants, industrial kilns, gas turbines, and aerospace combustion systems. Their durability makes them a preferred choice for critical service conditions.
What product forms are available in Incoloy 800H and 800HT?
MOKSH TUBES & FITTINGS LLP supplies Incoloy 800H and 800HT in a wide variety of product forms, including seamless and welded pipes, tubes, sheets, plates, coils, bars, pipe fittings, flanges, fasteners, and custom-fabricated components. All products are manufactured to international standards such as ASTM and ASME, ensuring quality, consistency, and performance in high-pressure, high temperature systems.
Why choose MOKSH TUBES & FITTINGS LLP for Incoloy 800H and 800HT materials?
MOKSH TUBES & FITTINGS LLP is a trusted manufacturer, supplier, and exporter of Incoloy 800H and 800HT products, offering ISO and ASTM-compliant materials across global markets. With extensive inventory, fast delivery, and customized solutions, the company ensures top quality products tailored to critical engineering applications. Its expertise in high performance nickel alloys, combined with strong customer support, makes it the preferred choice for industries worldwide.
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