Incoloy 800H: Is This The Best Incoloy Variant?

Incoloy has become quite popular as one of the most reliable superalloys in the market. Known for its impressive physical properties and durability, the superalloy is as flexible and as versatile as possible. And, with the tool working in different industries, its popularity has soared significantly in the past few years. 

Among the many variants of Incoloy is the Incoloy 800 series. The series is known for its resistance to factors such as corrosion and extreme temperature changes – a feature that has been extended to the Incoloy 800H variant. 

With so many classifications available, its ability to stand out has been one of the major benefits of Incoloy 800H. In this article, you get to understand what the material is, as well as how it is being used across different industries.  

Incoloy: A Special Superalloy

As explained earlier, Incoloy 800H is an alloy that comes as part of the Incoloy 800 series. Also developed by Special Metals Corporation, the alloy is made from a combination of Nickel, Iron, and Chromium. A seamless blend of these elements is part of what makes the material so reliable, and what helps it to exhibit its impressive strength and corrosion resistance. 

It is worth noting, of course, that there are several elements that makeup Incoloy 800H – something we’ll look into when we consider the Incoloy 800H chemical composition. 

Seen by many manufacturers and metallurgists as a modified version of the original Incoloy 800, this variant provides a host of additional benefits – including creep resistance and high-temperature strength. These benefits come primarily due to the fact that Incoloy 800H has a much higher carbon content than most other Incoloy 800 samples. 

Today, the material is used across multiple industries, from marine to power generation, chemical processing to automotive, and much more. As long as it’s an industry where reliable performance in the most aggressive environments, Incoloy 800H can be applied.

One area where Incoloy 800H has done quite well is its optimal flexibility. Whether at room temperatures or elevated temperatures, the material’s material and mechanical properties make it a very flexible alloy compared to many in its category. 

At room temperature, Incoloy 800H is incredibly ductile and highly elongated. This allows the material to easily be bent without experiencing any cracks or material failure in its frame. Incoloy 800H is flexible, making it easy for you to form and shape it to your liking and based on your specifications. For manufacturing processes, the benefit of this can’t possibly be overstated. 

Just as well, Incoloy 800H remains highly flexible even at elevated temperatures. The material’s ability to withstand thermal expansion and contraction without encountering form failure shows that it is very ductile. And, in applications where exposure to high-temperature environments is inevitable, the material will be able to withstand thermal cycling or mechanical stress.

That said, it is critical to note that this flexibility can also vary based on a number of factors – including and especially the temperature it is exposed to, the condition of the alloy, and even the material’s specifications and Incoloy 800H chemical composition. Just as well, although the material is relatively flexible compared to many other superalloys, it might not actually exhibit the same level of flexibility as many other non-metallic materials or ductile alloys – especially at lower temperatures. 

Overall, Incoloy 800H possesses good flexibility and ductility, allowing it to be formed, bent, and shaped to meet the requirements of various applications, both at room temperature and in high-temperature environments.

Composition and Properties of Incoloy 800H

Chemical Composition of Incoloy 800H

As we said earlier, Incoloy 800H primarily comes as a combination of Nickel, Iron, and Chromium. However, the alloy also consists of several other elements that make up its form. 

Although combinations vary, the general Incoloy 800H chemical composition usually looks like this: 

It is important to note that these ranges are only typical. So, depending on the manufacturer and the desired product specifications, you might expect to see different element compositions in your Incoloy 800H alloy.

As the table above shows, the major elements available in Incoloy 800H are Chromium and Nickel. This combination is quite popular in many alloys, and it provides Incoloy 800H with the corrosion and oxidation resistance that the alloy has become famous for. The elements also ensure that Incoloy 800H is more resistant to high temperatures, thus making it applicable in different industries. 

With Iron being added as a base metal, Incoloy 800H provides more refined structural integrity than many other alloys. And, it’s also mechanically stronger too, for good measure. 

The presence of Carbon in Incoloy 800H at controlled levels of 0.05-0.10% enables improved high-temperature strength and creep resistance compared to the standard Incoloy 800 alloy. Carbon also helps in preventing sensitization, which is the precipitation of chromium carbides at grain boundaries that can cause intergranular corrosion.

Small amounts of Aluminum and Titanium are added to promote the formation of a protective oxide scale on the alloy’s surface, further enhancing its resistance to oxidation and scaling in high-temperature environments.

Incoloy 800H may also have trace amounts of other elements such as Sulfur, Manganese, Silicon, and Copper, which are present in quantities within the specified limits to meet the desired material properties and performance requirements.

It’s worth noting that the exact chemical composition of Incoloy 800H can vary slightly between different specifications, manufacturers, or specific product forms. This means that it is incredibly important for you to refer to the specific Incoloy 800H datasheet or the official manufacturer’s documentation for precise composition information.

At Tuolian Metal, we can provide you with all of the information you need about Incoloy 800H. Including our manufacturing processes and product compositions. 

Physical Properties Of Incoloy 800H

The composition of Incoloy 800H has allowed it to enjoy several impressive physical properties. These Incoloy 800H physical properties have been responsible for the alloy’s use in different industries and spaces, and some of the most notable of them include the following: 

• Density: The Incoloy 800H density is approximately 7.94 g/cm³ (0.287 lb/in³). The material is quite dense, and while this isn’t the highest of all alloys, it sure puts Incoloy 800H in the higher percentile of alloys. 
• Melting Point: With Incoloy 800H, you get a material with a relatively high melting point. With the metric standing at about 1350-1400°C (or, 2460-2550°F if you will), Incoloy 800H is perfectly able to maintain its structural integrity even at the highest of temperatures. For applications where exposure to high temperatures is a significant requirement, you can count on Incoloy 800H to hold its own. 
• Thermal Conductivity: Compared to other metals or alloys, Incoloy 800H has a much lower threshold for thermal conductivity. The material has a thermal conductivity of about 11.4 W/m·K (66.4 BTU/hr·ft·°F) at room temperature – pretty low, but definitely workable especially when you consider its melting point.
• Electrical Resistivity: Incoloy 800H has a relatively high electrical resistivity. It offers a resistivity of about 1.05 μΩ·m (65.6 μΩ·in) at room temperature.
• Coefficient of Thermal Expansion: The coefficient of thermal expansion indicates a material’s rate of contraction or expansion as temperatures change. For Incoloy 800H, you have a coefficient that stands at about 14.1 µm/m·K (7.8 µin/in·°F) at room temperature.
• Magnetic Properties: Incoloy 800H is a ferromagnetic material. This means that it is able to stick to magnets and can easily be magnetized. The magnetic property makes Incoloy 800H quite unique among alloy options, and it can be an advantageous property in specific applications. 

Per usual, you want to keep in mind that these physical properties could easily vary based on the manufacturing process used to make this alloy. Just as well, the chemical composition – particularly, the percentage compositions of the elements – can affect the physical properties of Incoloy 800H across the board. 

To wit, always remember to get manufacturer specifications and precise information about the material before purchasing it. Understand how the material exhibits its physical properties, as well as how this can affect your desired application. 

Chemical Properties Of Incoloy 800H

With its unique chemical composition, it should come as no surprise that Incoloy 800H also has several properties that help it to stand out among other alloys. Generally, you can find the following chemical properties from the Incoloy alloy: 

• Oxidation Resistance: When at high temperatures, Incoloy 800H exhibits excellent oxidation resistance. This factor is primarily due to the alloy’s heavy content of Chromium, which helps to form a protective layer of oxide on the material’s surface. In the event of oxidation, the Chromium content helps Incoloy 800H to remain solid.
• Carburization Resistance: Carburization is the absorption of carbon into a material. It typically occurs at high temperatures, and can significantly affect the material’s structural integrity. With Incoloy 800H, you get optimal resistance to carburization, making the material especially suitable for applications where carburization is a possible threat – from chemical to petroleum processing industries. 
• Corrosion Resistance: As you can expect from an alloy made of Nickel, Incoloy 800H also does well to resist corrosion in different environments. The material resists different acids, alkalis, and even neutral salt solutions, although you should note that it might be susceptible to corrosion in some oxidizing acids or reducing environments.
• High-Temperature Strength: When subjected to high temperatures, you can rest assured that Incoloy 800H will be able to retain its strength and mechanical properties. The material’s creep rupture strength is high, and it displays excellent structural stability at temperatures up to 1000°C (1832°F).
• Weldability: Incoloy 800H is weldable using standard welding techniques. However, you should note that the Incoloy weldability also needs to be considered when you’re looking to maintain and optimize the alloy’s corrosion resistance. Excessive welding could cause some of its properties to erode, leading to a depletion that could affect it in the long run.

Like the physical properties, the chemical properties of Incoloy 800H will also vary significantly on the manufacturing processes and the exact composition of the alloy. So, always contact the manufacturer to ensure that you’re getting the right mix before making a purchase.

Mechanical Properties Of Incoloy 800H

Like every other property category, it is important to note that the Incoloy 800H mechanical properties also do vary based on the manufacturer’s specifications and the material combination. However, for most Incoloy 

• Tensile Strength: While at room temperature, you can expect Incoloy 800H to exhibit tensile strength that ranges between 520-690 MPa (75,000-100,000 psi). This is quite impressive overall, showing that the material can withstand significant amounts of force before breaking or even splitting. 
• Yield Strength: Besides the impressive tensile strength, Incoloy 800H also demonstrates impressive yield strength, showing that it doesn’t display any plastic deformation even after significant strain. With a yield strength of approximately 210-450 MPa (30,000-65,000 psi) at room temperature, Incoloy 800H is quite durable..
• Elongation: Elongation refers to a material’s stretch extent before fracturing. For Incoloy 800H, you can expect an elongation rating of about 30% or more. This shows impressive ductility and an ability to operate under immense pressure.
• Hardness: The Incoloy 800H hardness value is approximately 150-220 HB or 85-20 HRC. As explained, the material does well to resist any form of indentation or deformation, while also optimizing strength and wear resistance.
• Impact Strength: Generally, Incoloy 800H has good impact strength and can withstand breakage under any sudden loading. However, you should note that the material’s impact strength value could vary based on factors such as temperature and testing conditions.
• Creep Resistance: The Incoloy 800H creep resistance is excellent, meaning it can resist deformation over time when exposed to high temperatures. It has a high creep rupture strength, making it suitable for applications requiring long-term stability under elevated temperature conditions.

Incoloy 800H: Product Variants

Incoloy 800H Pipe 

An Incoloy 800H pipe is a specifically-designed pipe that is made of the material. These pipes are designed to handle elevated temperatures and corrosive environments, making them especially suitable for diverse applications. 

Incoloy 800H pipes are available in different sizes, lengths, and thicknesses, accommodating different application requirements.they can also be seamless or welded, depending on the manufacturing process. 

The seamless Incoloy 800H pipes are produced by extruding a solid billet and then rolling or drawing it to the desired size, while welded pipes are fabricated by joining the edges of a flat strip or plate through welding techniques.

All in all, these pipes should be selected based on the specific application requirements as well as your desired specifications – from pressure and temperature to the nature of the fluid or gas being transported.

Incoloy 800H Sheet

In an Incoloy 800H sheet, you have a thin, flat piece of material that is made from Incoloy 800H. The sheets are specially made to offer reliable durability and performance, especially in demanding industrial applications.

Incoloy 800H sheet manufacturers usually apply cold or hot rolling to make their pipes. With hot rolling, the alloy is heated to a high temperature and passed through rollers to adjust its thickness and shape it perfectly. On the flip side, cold rolling involves room temperature processing, which results in a sheet that offers a smoother finish. 

When selecting an Incoloy 800H sheet, it is important to consider factors such as the intended application, operating temperature, and mechanical properties required. Remember to speak with your Incoloy 800H sheet supplier to get more guidance on which option to choose. 

Incoloy 800H Strip 

An Incoloy 800H strip refers to a thin, flat piece of material made from the alloy Incoloy 800H. Like the sheets, these strips are also typically produced through the hot or cold rolling steps. 

Incoloy 800H strips find applications in industries such as chemical processing, petrochemical, power generation, and heat treatment. They are available in different widths and thicknesses to suit different requirements, and they provide optimal versatility in terms of further processing – from bending and cutting to forming. All of these are expected to help the material meet the right application requirements. 

When selecting an Incoloy 800H strip, factors such as the intended application, operating temperature, and dimensions required should be considered. 

Incoloy 800H Bar 

An Incoloy 800H bar is a solid, cylindrical rod made from the Incoloy 800H alloy. The bars are manufactured to provide stability, strength, and optimal heat resistance regardless of the application. 

Incoloy 800H bar manufacturers typically use hot rolling or forging to produce their bars. Here, the alloy itself is heated to a high temperature and then shaped into a bar via compression. In the case of hot rolling, the alloy is passed through rollers to cut its diameter and properly shape it into a bar. 

Incoloy 800H bars are available in various diameters and lengths, and they also provide optimal flexibility in terms of further processing. Consider the selected application and specifications of the bar before making a purchase, and remember to see advice from an Incoloy 800H bar supplier if you need any help. 

Incoloy 800H Coil 

An Incoloy 800H coil is a continuous, wound strip of the alloy Incoloy 800H. Incoloy 800H coils are specifically manufactured to provide convenience and flexibility, operating in different industrial applications. 

Developed using hot or cold rolling, Incoloy 800H coils work in industries such as petrochemical and chemical processing, heat treatment, and more. As you can expect, their high temperature and corrosion resistance, coupled with strength and thermal stability, will make them especially suitable for withstanding high temperatures.

The convenience of Incoloy 800H coils lies in their continuous form, which makes it easier to handle, transport, and process them further. The coils can also easily be cut into the desired lengths and formed into different shapes based on the specific application requirements. 

When selecting an Incoloy 800H coil, factors such as the intended application, operating temperature, and dimensions required should be considered.

Manufacturing and Fabrication of Incoloy 800H

As it is with many alloys, manufacturing for Incoloy 800H can vary quite a bit. Manufacturers are free to choose whichever methods they lease, as well as the sequences of steps and events. 

However, for most manufacturers, the process of making Incoloy 800H tends to look like this:

• Raw Material Selection: As it is with most alloys, the first step is usually to get the best in quality raw materials. We already know the elements that makeup Incoloy 800H – the manufacturer’s job is to ensure that these elements are properly sourced and able to meet the minimum specifications. Getting the right composition and purity of these materials will be crucial to achieving the desired properties of Incoloy 800H.
• Melting: Once the materials are gathered, the next step is to melt them in a controlled environment. Usually, this process is done in a furnace. With proper melting, you can ensure uniformity and homogeneity in the total composition of the alloy. 
• Casting: After getting the right composition of the material, you can go on to cast it into billets or ingots. Pour the material into molds, then allow the billets or ingots to solidify properly. 
• Forming: The solidified ingots or billets are then reheated to a suitable temperature – after which they are processed through different heat treatments; forging, extrusion, rolling, and more.  These processes help shape the material into the desired form, while also helping to define the microstructure.
• Heat Treatment: Once the forming process is done, it’s important to let the material go through proper heat treatment. This allows you to optimize its mechanical and physical properties, so it is even more suitable for different applications. The heat treatment process usually involves heating the material to a specific temperature and holding it at that temperature for a defined period, after which it is cooled at a controlled level. followed by controlled cooling. Heat treatment processes may include solution annealing, quenching, and aging.
• Machining and Finishing: With the material now getting the appropriate heat treatment, the next step will be to complete a few Incoloy 800H machining and finishing processes. This helps manufacturers to get the proper dimensions and specifications – from tolerance to surface quality and more. In some cases, these steps could include grinding, cutting, and passivation. 
• Quality Control: For most manufacturers, it is important to ensure that the Incoloy 80H alloy goes through proper quality control measures to ensure that all standards and requirements are met. Inspections should be scheduled, tests should be conducted, and analyses should be made. Quality control methods should be non-invasive, as long as the product is able to show compliance with the necessary specifications. 
• Final Inspection and Packaging: With the manufacturing process now being complete, you want to inspect the final product for quality, dimensional accuracy, and adherence to proper standards. From there, the products are packaged and labeled for transportation and distribution. 

Maintenance and Care for Incoloy 800H

Due to its corrosion resistance and several other important properties, Incoloy 800H requires a significant amount of maintenance and care. These steps help to preserve its performance and longevity, and you will need to keep them in mind if you hope to get the most out of the material. 

Here are some importance Incoloy 800H maintenance steps:

• Regular Cleaning: On a regular basis, be sure to clean the surface of your Incoloy 800H material to clear out any dust, dirt, and debris. Cleaning can be done using water, mild soap, and a soft sponge or cloth. Also, steer clear of any abrasive brushes or cleaners that could cause scratches on the surface. 
• Corrosion Protection: Despite the fact that the material resists corrosion, it is still very advisable that you take the right steps to protect Incoloy 800H from any corrosive materials. Apply corrosion inhibitors when necessary, and coat it properly for protection.
• Avoid Exposure to Harsh Environments: Just like corrosion, it is important that you always protect your Incoloy 800H material from general harm. While the material does well in different environments, be sure to avoid exposure to harsh chemicals, extreme temperatures, and other potentially degrading agents as much as you can. If the material does come in contact with these agents, protective coatings and layers should be put in place to keep it in top shape.
• Regular Inspection: If you’re using Incoloy 800H for any manufacturing work, then you want to conduct regular inspections of the material. Specifically, look out for signs of damage, degradation, or corrosion. Any issues found during the inspection should be properly addressed and treated.
• Address Surface Contamination: Over time, it won’t be strange to find surface contaminants such as rust or scale on your Incoloy 800H material. With the right cleaning methods, you can take these out seamlessly. Also, be careful when selecting cleaning agents to avoid material damage. 
• Prevent Deformation and Mechanical Damage: When excessive damage or deformation is applied to it, Incoloy 800H might experience mechanical damage or deformation. So, as much as possible, ensure that this isn’t the case.  Perform regular inspections for signs of deformation, such as warping or bending, and take corrective actions if necessary.
• Follow Manufacturer’s Guidelines: Adhere to the manufacturer’s guidelines and recommendations for maintenance, as they provide specific instructions tailored to Incoloy 800H. This includes information on cleaning agents, temperature limits, and any specific requirements for the particular application.

You should also keep in mind that the specific maintenance steps will vary based on the specifications of the Incoloy 800H material. So, consult your manufacturer’s datasheet and documentation or seek the right advice on how best to maintain your material.

Applications of Incoloy 800H

Incoloy 800H has several important and redeeming qualities – including and especially the fact that the material is quite versatile. Today, the material is being used in several industries – including the following: 

• Heat Exchangers: High-temperature applicability is one of the major benefits of Incoloy 800H. And, it is one of the reasons why the material is especially popular in the heat exchange industry. With optimal oxidation resistance and carburization holding, Incoloy 800H  is widely used in heat exchangers for high-temperature applications. Its resistance to oxidation and carburization makes it suitable for transferring heat between different fluids or gases.
• Furnace Components: Furnace component manufacturers have also been using the material in their operations. With Incoloy 800H, components such as muffles, radiant tubes, and pigtails can be manufactured. The temperature resistance and thermal fatigue combating are what makes the material especially suitable for this application.
• Chemical Processing: Incoloy 800H is utilized in various chemical processing equipment where resistance to corrosive environments is crucial. It is employed in reactors, distillation columns, piping systems, and other components that come into contact with corrosive chemicals.
• Power Generation: Power generation facilities also use a significant amount of Incoloy 800H. The material is used in designing components for nuclear power plants and fossil fuel-fired plants, with its application being used for diverse components such as boiler tubes, heat exchangers, and steam superheaters. Once again, the material’s resistance to corrosion and high temperatures will be critical on this front. 
• Petrochemical Industry: Incoloy 800H is also used in the petrochemical industry for applications that require resistance to high-temperature environments and corrosive media. 
• Aerospace Industry: In the aerospace industry, Incoloy 800H is used in manufacturing components such as engine parts, exhaust systems for planes, and afterburner liners.
• Food Processing: With its resistance to oxidation and corrosion, Incoloy 800H is used in the food processing industry where it is applied in making everything from heat treatment equipment to high-temperature cooking apparatus.
• Pharmaceutical Industry: Incoloy 800H is also heavily used in the pharmaceutical industry for applications that require exposure to corrosive and high-temperature environments. 

These applications are really only the tip of the iceberg. With Inbcoloy 800H’s unique combination of strength and resistance to both corrosion and oxidation, the material is suitable for use in multiple industries and environments.

Incoloy 800H: Product Advantages 

• High-Temperature Strength: Incoloy 800H exhibits an impeccable amount of high-temperature strength, allowing the material to maintain its structural integrity and mechanical properties. This is available even at elevated temperatures of up to 1000°C (1832°F). This especially makes the material suitable for applications in furnace components, heat exchanges, and power generation. 
• Oxidation and Carburization Resistance: The material has outstanding resistance to carburization and oxidation at high temperatures as it is able to form a protective layer of oxide on its surface. This layer prevents further oxidation and allows Incoloy 800H to maintain its corrosion resistance even in the harshest and most unforgiving environments. 
• Corrosion Resistance: With Incoloy 800H, you also get optimal resistance to different corrosive environments – from acidic ones to alkaline and more. Besides this, the material displays excellent resistance to intergranular corrosion as well as stress corrosion cracking- a factor that makes it suitable for applications such as petrochemical and chemical equipment processing. 
• Ductility and Formability: Even at extreme temperatures, Incoloy 800H remains incredibly ductile and formable. This allows the material to easily be fabricated and formed into different sizes and shapes. From hot and cold working to welding, versatility in formability is one of the major benefits of this material.

Possible Drawbacks Of Incoloy 800H

• Limited Resistance to Some Environments: While resistance to corrosion and oxidation are notable benefits of this material, it is noteworthy that it might also not be so great at resisting the effects of reducing environments or certain oxidizing acids.
• Higher Cost: Incoloy 800H is also more expensive compared to some other alloys due to its specific composition and properties. With Nickel being the major constituent element, the Incoloy 800H price tends to run higher than normal. Compared to some other materials, it might not necessarily be so cost-effective. 

All in all, limited availability and a higher cost might be the biggest impediments to Incoloy 800H. However, when you consider the material’s benefits and flexibility in operation, most manufacturers would agree that its benefits outweigh its drawbacks. 

Before making a purchase, you should always remember to keep an eye on the pros and cons of the material, as well as the specifications of the manufacturer. 

Incoloy 800H vs Other Incoloy Variants

With Incoloy 800H being one of the most popular Incoloy variants, it is worth examining how it compares to other notable names in the same category. 

Incoloy 800H vs Incoloy 800

Incoloy 800H and Incoloy 800 are both nickel-iron-chromium alloys with similar chemical compositions. However, there are lines of divergence here as well:

Chemical Composition:

• Incoloy 800H: The Incoloy 800H alloy comes with a chemical composition of approximately 32% Nickel, 20-23% Chromium, 0.05-0.10% Carbon, 0.15-0.60% Aluminum, and small amounts of additional elements such as Manganese, Iron, and titanium. 
• Incoloy 800: With Incoloy 800, you have a similar structure to Incoloy 800H. The alloy contains approximately 30-35% Nickel, 19-23% Chromium, 0.10% maximum Carbon, 0.15-0.60% Aluminum, and trace amounts of other elements. This could be the first point in the Incoloy 800H vs Incoloy 800 debate.

High-Temperature Strength:

• Incoloy 800H: With a design that allows it to operate under temperatures of up to 1000°C (1832°F), Incoloy 800H has a higher maximum operating temperature and improved high-temperature strength compared to Incoloy 800.
• Incoloy 800: With Incoloy 800, you have an alloy that holds a maximum operating temperature of about 870°C (1600°F).

Mechanical Properties:

As you’d expect, there isn’t much on this front for the Incoloy 800 vs Incoloy 800H debate. Both materials exhibit very similar mechanical properties, from yield and tensile strength to elongation and more. 

However, due to its controlled carbon content, you should note that Incoloy 800H generally exhibits slightly higher mechanical properties across the board.

Applications:

Both Incoloy 800H and Incoloy 800 are used in similar applications that require high-temperature strength and corrosion resistance. So, they don’t have much of a comparison here as well. 

Incoloy 800H vs Incoloy 825 

Chemical Composition:

The first stop on the Incoloy 800H vs Incoloy 825 is for chemical composition. Here’s how they compare:  

• Incoloy 800H: It contains approximately 32% Nickel, 20-23% Chromium, 0.05-0.10% Carbon, 0.15-0.60% Aluminum, and small amounts of other elements such as Iron, Sulfur, and Titanium. 
• Incoloy 825: For Incoloy 825, you get a material that contains approximately 38-46% Nickel, 19.5-23.5% Chromium, 2.5-3.5% Molybdenum, 1.5-3% Iron, 0.6-1.2% Copper, and smaller amounts of other elements.

Corrosion Resistance:

• Incoloy 800H: Incoloy 800H excellently resists oxidation, carburization, high-temperature corrosion, and more – all of which make it suitable for high-temperature applications.
• Incoloy 825: When it comes to corrosive environments, Incoloy 825 actually offers superior levels. The material is especially well-suited for applications that involve sulfuric acid. 

Temperature Limit:

• Incoloy 800H: This material is designed for high-temperature applications and has a maximum operating temperature of approximately 1000°C (1832°F).
• Incoloy 825: You get a lower maximum operating temperature with Incoloy 825 compared to Incoloy 800H, typically around 550-595°C (1020-1100°F).

Mechanical Properties:

In this part of the Incoloy 825 vs Incoloy 800H debate, there isn’t much comparison. 

Incoloy 800H and Incoloy 825 have different mechanical properties due to their varying compositions, although  Incoloy 800H exhibits higher tensile strength and yield strength compared to Incoloy 825.

Applications:

• Incoloy 800H: It is commonly used in high-temperature applications such as heat exchangers, furnace components, and petrochemical processing.
• Incoloy 825: It is widely utilized in corrosive environments, including chemical processing, acid production, and marine applications. It is also used in pollution control equipment and pickling equipment.

Incoloy 800H vs Incoloy 926

Also, a Nickel alloy, Incoloy 926 is a super-austenitic steel variant that shares several of the same characteristics as Incoloy 800H. Below is a breakdown of their differences:

Chemical Composition:

• Incoloy 800H: As explained earlier, Incoloy 800H typically contains about 32% Nickel, 20-23% Chromium, 0.05-0.10% Carbon, 0.15-0.60% Aluminum, and small amounts of other elements. 
• Incoloy 926: On the other hand, Incoloy 926 is a super-austenitic alloy that contains approximately 25% Nickel, 19-21% Chromium, 6-7% Molybdenum, 0.15-0.50% Nitrogen, and smaller amounts of other elements.

Corrosion Resistance:

• Incoloy 800H: The material offers excellent resistance to oxidation, carburization, and corrosion in high-temperature environments. Just as well, Incoloy 800H particularly resists atmospheres containing sulfur as well as nitriding conditions. 
• Incoloy 926: Incoloy 926 has been known for its exceptional resistance to different corrosive environments, including acids and chloride-containing environments. The material also provides excellent crevice and omits corrosion resistance. 

Temperature Limit:

• Incoloy 800H: Designed to handle temperatures of up to 1000°C (1832°F), Incoloy 800H has impeccable temperature resistance. 
• Incoloy 926: However, it should be noted in the Incoloy 800H vs Incoloy 926 debate that the latter has lower temperature resistance – with a maximum operating temperature pegged at about 600-650°C (1112-1202°F).

Mechanical Properties:

Incoloy 800H and Incoloy 926 have different mechanical properties due to their distinct compositions – another solid point in the Incoloy 926 vs Incoloy 800H debate.

In general, Incoloy 800H exhibits good tensile strength, yield strength, and elongation properties suitable for high-temperature applications. However, detailed mechanical property data for Incoloy 926 may vary depending on the specific manufacturing and heat treatment processes.

Applications:

• Incoloy 800H: It is commonly used in high-temperature applications such as heat exchangers, furnace components, petrochemical processing, and power generation.
• Incoloy 926: It finds applications in demanding environments where corrosion resistance is critical, including chemical processing, oil and gas exploration, offshore platforms, and marine environments.

Conclusion

Incoloy 800H has made a name for being one of the most prominent Incoloy alloys available. And, as the material continues to find application in more industries, adoption of it is only set to keep growing. 

If you’re looking to figure out the Incoloy 800H price or learn more, please contact us at Tuolian Metal and let us know what you need. 

Properties of INCOLOY 800H

Good Weldability – This alloy can be easily welded using conventional welding techniques such as Gas-Tungsten Arc Welding, Shielded Metal-Arc Welding, Gas Metal-Arc Welding, etc.

Low carbon content – highly resistant to carbide precipitation during the welding process.

High nickel content – Incoloy 800H contains 30-35% nickel. This feature enhances its resistance to corrosion and high-temperature oxidation.

Good thermal stability – allows the alloy to maintain its mechanical properties at high temperatures.

Excellent Machinability – Easily machined using drilling and turning techniques.

Surface stability – Reduces the risk of cracking and corrosion.

Applications

Incoloy 800H is ideal for different applications that handle up to 1100°F (600°C) temperatures. This alloy is used in producing heat exchangers and furnace parts in the chemical industries. It is also utilized in the aerospace industry for manufacturing nuclear power plant components and pollution control equipment.

Aside from that, this alloy is also found in the power generation industry for parts such as superheater tubes, steam headers in boilers, & heat recovery steam generators. And through machining, several types of valves and fittings can be produced using Incoloy 800H grade.

Equivalent Grades

• Alloy 800H
• UNS N08810
• Werkstoff Number 1.4958
• DIN EN 1.4958
• ISO 6207