Incoloy Alloy
What is Incoloy Alloy?
Incoloy Tube is a Ni-Cr alloy that has superior ability to maintain a stable structure during prolonged exposure to high temperatures. It is a chrome-iron- nickel alloy that contains titanium, copper, molybdenum. It possesses a high resistance to various types of corrosion in aggressive environment (crevice corrosion,corrosion cracking, intercrystalline corrosion). Alloy does not lose a mechanical resistance even at critical heating.
Incoloy Main Grades Comparison Chart
| Alloy Grade | UNS Number | Core Advantages | Service Temperature | Core Application Scenarios |
|---|---|---|---|---|
| Incoloy 800 | N08800 | Balanced performance, cost-effective, easy to process and weld | ≤900 °C | General high-temperature furnace parts, heat exchanger tubes, heat treatment tooling |
| Incoloy 800H | N08810 | High temperature creep resistance, excellent pressure-bearing performance | ≤950 °C | Boiler tubes, pressure vessels, cracking equipment |
| Incoloy 800HT | N08811 | High high-temperature rupture strength, anti-aging | ≤1000 °C | Ultra-high temperature kilns, exhaust gas treatment, high-temperature heat exchange systems |
| Incoloy 825 | N08825 | Acid and alkali resistant, chloride ion corrosion resistant | ≤850 °C | Seawater desalination, desulfurization equipment, heat exchangers |
| Incoloy 925 | N08925 | High strength, corrosion resistant, sulfide stress corrosion cracking resistant | ≤800 °C | Oil and gas extraction, sour gas fields, valves, pipelines |
Global Equivalent Alloy Grades of incoloy
| Commercial grade | UNS | GB (china) | W.nr./en (de/eu) | JIS (japan) | BS (uk) | AFNOR (france) |
|---|---|---|---|---|---|---|
| Incoloy 800 | N08800 | NS1101 (old NS111) | 1.4876 / X10NiCrAlTi32-20 | NCF800 | NA15 | Z8NC32.21 |
| Incoloy 800H | N08810 | NS1102 (old NS112) | 1.4958 / X5NiCrAlTi31-20 | NCF800H | NA15(H) | — |
| Incoloy 800HT | N08811 | — | 1.4959 / X8NiCrAlTi32-21 | NCF800HT | — | — |
| Incoloy 825 | N08825 | NS1402 (old NS142) | 2.4858 / NiCr21Mo | NCF825 | NA16 | NC21FeDu |
| Incoloy 926 | N08926 | 022Cr25Ni20Mo7CuN | 1.4529 / X1NiCrMoCuN25-20-7 | SUS890L | — | — |
| Incoloy A-286 | S66286 | GH2132 | 1.4980 / X6NiCrTiMoVB25-15-2 | — | DTD5026 | Z5NCTDV26-15-B |
| Incoloy 901 | N09901 | GH2901 | 2.4662 | — | Nimonic 901 | Z8NCDT42 |
What are Features of Incoloy Alloy?
Corrosion Resistance
Incoloy alloys are renowned for their excellent resistance to corrosion. They can withstand a wide range of corrosive environments, including acids, alkalis, seawater, and various chemical solutions. This property makes Incoloy alloys suitable for applications in chemical processing, offshore and marine environments, and other corrosive settings.
High-Temperature Strength
Incoloy alloys possess impressive strength and stability at elevated temperatures. They maintain their mechanical properties and structural integrity even under extreme heat conditions, making them ideal for use in high-temperature environments such as gas turbines, furnace components, and heat exchangers. This Incoloy water heater element is one of the major reasons why the material itself is so popular.
Oxidation Resistance
Incoloy alloys exhibit exceptional resistance to oxidation, preventing the formation of oxide scales on the surface at high temperatures. This resistance helps maintain the alloys’ performance and extends their service life in oxidizing atmospheres.
Weldability and Formability
Incoloy alloys generally exhibit good weldability, allowing for ease of fabrication and joining. They can be readily formed into various shapes, including sheets, bars, pipes, and wires, enabling flexibility in manufacturing processes.
Resistance to Creep and Fatigue
Incoloy alloys display resistance to creep, which is the deformation that occurs under prolonged exposure to high temperatures. They also exhibit resistance to fatigue, with the ability to withstand cyclic loading and stress over long periods without failure.
Electrical Conductivity
Incoloy alloys possess good electrical conductivity, making them suitable for applications that require electrical conductivity along with other desirable properties.
Available Product Forms
We supply the full range of Incoloy alloys in various product forms, with both custom manufacturing and stock availability to meet material requirements for different equipment and processing applications. Value-added services including cut-to-size, precision machining, and custom dimensions are also available.

Pipe & Tube Products
Seamless Precision Tubes, Heat Exchanger Tubes, High-Temperature Furnace Tubes, Fluid Transport Pipes, and Welded Tubes—designed for heat exchange equipment and high-temperature piping systems, with tight dimensional tolerances and clean, contamination-free inner surfaces.
Plate & Sheet Products
Medium and Heavy Plates, Thin Sheets, Cold-Rolled Coils, and Steel Strips, featuring pickled and bright surfaces free from oxide scale. Suitable for equipment housings, lining plates, high-temperature insulation components, and corrosion-resistant structural parts.


Bar & Rod Products
We supply round bars, square bars, forged bars and precision-turned (bright) bars, all held to tight dimensional tolerances with uniform mechanical properties throughout. Ideal for shafts, fasteners, machined components and pressure parts.
Pipe Fittings
Custom fittings including flanges, elbows, tees, reducers and other components are available in matching material grades, ensuring consistent corrosion resistance and high-temperature performance for the complete equipment set.

Core application industries and working conditions
With a balanced combination of high-temperature resistance, corrosion resistance and good machinability, Incoloy® alloys are widely used across high-end industrial applications worldwide. They are the cost-effective nickel-based choice for medium-to-high temperature corrosive service.
Oil and gas industry
Subsurface oil & gas transmission pipelines, wellhead equipment, desulfurization and deacidification units, high-temperature cracking equipment for refining. Featuring outstanding sulfide resistance and fatigue resistance, these alloys are suitable for complex corrosive service conditions in oil and gas fields.


Chemical and petrochemical industry
Chemical heat exchangers, reaction kettles, evaporation equipment, pipelines for acid and alkali medium transportation. The alloys resist mild to moderate acid & alkali corrosion and intergranular corrosion, delivering stable equipment operation.
Power and energy industry
Power station boiler tubes, superheaters, reheaters, flue gas desulfurization and denitrification equipment, waste heat recovery systems. They are designed for long-term service environments with high temperature and flue gas corrosion.


Seawater desalination and marine engineering
Seawater heat exchange equipment, anti-corrosion components for offshore platforms, saltwater circulation systems. Incoloy 825 effectively resists chloride pitting corrosion and crevice corrosion in seawater.
Heat treatment and industrial furnace industry
High-temperature furnace linings, heating tooling, furnace rolls, heat treatment fixtures, sintering equipment. The alloys offer high-temperature oxidation resistance with minimal deformation and scaling, ensuring extended service life.


Environmental protection and pharmaceutical industry
Waste incineration equipment, waste gas treatment units, anti-corrosion heat exchange equipment for pharmaceutical applications. The materials feature high cleanliness, excellent corrosion resistance with no impurity precipitation, complying with industrial environmental standards.
Nickel (Ni)
As we said earlier, the primary element in any Incoloy material is Nickel. In some Incoloy metal alloys, you could find it constituting up to 65% of the entire Incoloy steel. Thanks to Nickel, Incoloy is able to achieve high levels of high-temperature strength, corrosion resistance, and optimal mechanical properties.
Chromium (Cr)
Next to Nickel, Chromium is probably the material you find in an Incoloy composition. Generally, Chromium is added to Incoloy alloys to enhance their resistance to oxidation and corrosion. The element provides a protective oxide layer on the surface, helping to optimize corrosion resistance and provide a more resolute frame.
Iron (Fe)
Iron is another popular element that’s used to make Incoloy. In most cases, it is present in small to medium amounts. Thanks to the Iron content, Incoloy is able to optimize strength and several of its material and mechanical properties.
Molybdenum (Mo)
While it might not be the most popular, Molybdenum is often included in Incoloy alloys to enhance their corrosion resistance. The downside, however, is that Molybdenum isn’t the most common element to find around. So, due to its content, the Incoloy price tends to rise even more. Nevertheless, the addition of this material helps Incoloy to thrive in environments where reducing acids and chlorides are present.
How to Clean a Incoloy Alloy?
Remove Surface Contaminants with Solvents
The first step in cleaning your Incoloy is to remove any surface contaminants such as oils, greases, or other residues using a solvent such as mineral spirits or acetone. Start by wiping down the surface with a clean cloth soaked in the solvent of your choice. If there are any stubborn stains, use an old toothbrush or soft-bristled brush to scrub them away lightly. Be sure to wear gloves when handling solvents and use them only in well-ventilated areas.
Clean Your Component With Soap & Water
Once you’ve removed all surface contaminants, it’s time to give your Incoloy component a thorough cleaning with soap and water. Fill a bucket or sink with warm water and add a mild detergent. Dip your component into the soapy water and use a sponge or soft-bristled brush to scrub away any dirt or grime that may have built up over time. Once the component is clean, rinse it with cold running water until all traces of soap residue have been removed.
Polish Your Component for Shine & Luster
To make your component look new again, it’s important to give it a good polish before putting it back into service. The best way to do this is by using an automotive polishing compound designed explicitly for metals like Incoloy. Apply the compound evenly across the component’s surface using circular motions. Then, let it sit for 5-10 minutes before buffing off with a clean microfiber cloth until the desired shine has been achieved.
Production process and quality assurance
Core production process
Vacuum melting and electroslag remelting processes are adopted to achieve high material purity and low impurity content. Subsequent solution annealing, precision rolling and bright finishing deliver consistent mechanical properties, high dimensional accuracy and superior surface quality for finished products, mitigating material segregation, cracking and other defects at the source.
Full-range inspection items
A full set of inspections is performed on all Incoloy alloy products prior to delivery for strict quality control. Inspection items include: PMI spectroscopic composition analysis, mechanical property testing (tensile strength, yield strength, elongation, hardness), UT ultrasonic testing, ET eddy current testing, hydrostatic test and grain size measurement.

PMI spectroscopic composition analysis

UT ultrasonic testing

ET eddy current testing

hydrostatic test

hardness testing

grain size measurement
Authoritative certification documents
We can supply EN 10204 3.1 / 3.2 material test certificates, original heat traceability reports and third-party inspection reports. Re-inspection by customer-specified institutions and factory witness acceptance are available to meet qualification requirements for EPC projects, export shipments and high-end equipment procurement.

Supply advantages and supporting services
Stock and custom processing service
Regular stock is available for all mainstream Incoloy grades. We support small sample orders, bulk purchases and non-standard dimension customization. Cutting, bending, welding and precision forming can be processed according to drawings to satisfy customized client requirements.
Export supporting capability
We have mature export packaging and logistics systems. Anti-rust and moisture-proof export packaging is adopted. Multiple trade terms including FOB, CIF and CFR are supported for worldwide delivery with full logistics traceability.
Technical support
Backed by an experienced in-house technical team, we provide application-based material selection advice, grade substitution solutions, welding and processing guidance, and technical parameter consultation. We help customers make accurate material choices, reduce procurement costs and avoid operational risks.
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Frequently Asked Questions
Q: What is Incoloy 900 Pipes & Tubes?
Q: What are the Uses of Incoloy 900 Pipes?
Q: What are the Advantages of Incoloy 900 Tubes?
Q: What are the characteristics of Incoloy 825 pipe?
Q: What are the applications of 903 825 Incoloy Alloy Pipe?
Q: What are the advantages of 903 825 Incoloy Alloy Pipe?
Q: What is the use of Incoloy pipe?
Q: What are the Difference Between Inconel And Incoloy Alloys?
Q: What are the advantages of Incoloy pipe?
Q: What performance benefits can be achieved by quenching and tempering Incoloy 800 Pipe?
Q: How To Choose The Right Incoloy 800 Pipe For Your Industry?
Q: What are the mechanical properties of Incoloy pipe?
Q: What types of Incoloy pipe are there?

















