ThePipingMart Blog Grades 800 Incoloy (UNS N08800) – Composition, Properties, and Uses

800 Incoloy (UNS N08800) – Composition, Properties, and Uses

Incoloy 800

800 Incoloy is a type of nickel-based alloy that is highly resistant to corrosion and oxidation. It has a wide range of industrial applications, particularly in the chemical processing industry, as it can withstand extreme temperatures, pressures, and corrosive environments. This article will discuss the chemical composition of Incoloy 800, its properties, and how it can be used in different situations.

What Forms is Incoloy 800 Available at Piping Mart?

  • Incoloy 800 Pipes
  • Incoloy 800 Tubing
  • Incoloy 800 Pipe Fittings
  • Incoloy 800 Bolts
  • Incoloy 800 Forged Fittings
  • Incoloy 800 Plates
  • Incoloy 800 Valves
  • Incoloy 800 Flanges
  • Incoloy 800 Fasteners
  • Incoloy 800 Nuts
  • Incoloy 800 Bars
  • Incoloy 800 Washer

Incoloy 800 Chemical Composition

Alloy 800 consists primarily of iron (76%), nickel (32%), chromium (21%), manganese (1.5%), silicon (1.5%), and carbon (0.15%). Additionally, it also contains trace amounts of aluminum, cobalt, copper, molybdenum, sulfur, and titanium. This combination of elements gives Incoloy 800 excellent resistance to oxidation at high temperatures up to 1120°F (600°C). The alloy also demonstrates good strength and toughness even at cryogenic temperatures down to -320°F (-195°C).

Element Content (%)
Iron, Fe ≥39.5
Nickel, Ni 30-35
Chromium, Cr 19-23
Manganese, Mn ≤1.5
Others Remainder

Incoloy 800 Chemical Properties

Incoloy 800 is a popular nickel and chromium based alloy designed to resist corrosion in extreme temperatures and environments. It also has excellent mechanical properties such as high strength, good oxidation resistance, and excellent carburization characteristics. From cryogenic temperatures all the way up to 1500°F (816°C), Incoloy 800 offers very reliable performance over an extremely wide temperature range. It also offers superb creep rupture strength which makes it a great choice for boilers, heat exchangers and other components that endure prolonged exposure to high temperatures. Additionally, owing to its low carbon content, this alloy is highly resistant to intergranular corrosion even in corrosive industrial environments. In every way Incoloy 800 proves to be one of the most impressive alloys you could use in any kind of application that demands exceptional performance under harsh conditions.

Incoloy 800 Physical Properties

Incoloy 800 is a nickel-iron-chromium alloy that has become increasingly popular over the years due to its ability to resist corrosion and oxidation. With an impressive tensile strength of 80,000 PSI and a melting point of 1425°C, Incoloy 800 has a range of applications in both low and high temperature conditions. Its physical properties also include good strength retention at elevated temperatures, excellent metallurgical stability and weldability, as well as resistance to chloride stress corrosion cracking. These features make Incoloy 800 ideal for use in marine and chemical processing equipment, petrochemical furnaces and power generation components.

Properties Metric Imperial
Density 7.94 gm/cm3 0.287 lb/in3

Incoloy 800 Mechnical Properties

N08800 is an alloy comprised of nickel and chromium, known for its impressive mechanical properties. It has a good combination of corrosion resistance with strength, making it a popular choice in the engineering world. Aside from these great mechanical properties, Incoloy 800 also offers superior creep and stress-rupture strengths at elevated temperatures compared to other stainless alloys, giving it huge potential for applications in diverse industries such as chemical processing, power generation and many more. With impressive ductility and malleability as well, Incoloy 800 makes for a great material for any job requiring strength retention even at higher temperatures.

Properties Metric Imperial
Tensile strength(annealed) 600 MPa 87 ksi
Yield strength(annealed) 275 MPa 39.9 ksi
Elongation at Break 45% 45%

Incoloy 800 Uses

Incoloy N08800 has a number of uses across many different industries due to its unique properties. One common application is for glass-lined heating elements where the high-temperature resistance is essential for efficient operation without damage or failure caused by overheating or corrosion from acidic fluids. Additionally, the alloy is often used in valves due to its ability to withstand extreme pressures without leaking or becoming damaged over time from wear and tear caused by frequent use. It’s also found in welding rods due to its ease of welding with standard equipment; furthermore, the alloy’s melting point is relatively low compared to other alloys, which makes it easier to work with during the manufacturing process. Finally, Incoloy 800 is commonly used in nuclear power plants since it’s resistant to radiation exposure which ensures safe operation over extended periods without failure or degradation caused by radiation damage over time.

Incoloy 800 Equivalent

Some of the designations used to denote INCOLOY alloy 800 are listed below:

UNS N08800 AMS 5766 AMS 5871 ASTM B163 ASTM B366
ASTM B564 DIN 1.4876

Incoloy 800 Specifications

Incoloy 800 Rod, Bar, Wire, Forgings, and Forging Stock ASTM B 408, ASME SB 408 (Rod & Bar), ASTM B 564, ASME SB 564 (Forgings),ASME Code Case 1325 (All Product Forms), ASME Code Case 1949 (Forgings), AMS 5766 (Rod & Bar), ISO 9723 (Rod & Bar), ISO 9724 (Wire), ISO 9725 (Forgings), BS 3076NA15 (Rod & Bar), BS 3075NA15 (Wire), VdTÜV 412 (All Products).

Incoloy 800 Plate, Sheet, and Strip

ASTM A 240, ASTM A 480, ASME SA 240, ASME SA 480 (Plate, Sheet, and Strip), ASTM B 409, ASTM B 906, ASME SB 409, ASME SB 906 (Plate, Sheet, and Strip),ASME Code Case 1325 (All Product Forms), ASME Code Case 2339 (Plate), AMS 5871 (Plate, Sheet, and Strip), BS 3072NA15 (Plate & Sheet), BS 3073NA15 (Strip), VdTÜV 412 (All Products), ISO 6208 (plate, sheet and strip).

Incoloy 800 Pipe and Tube

ASTM B 163 & ASME SB 163 (Seamless Condenser & Heat Exchanger Tubes), ASTM B 407, ASTM B 829, ASME SB 407, ASME SB 829 (Seamless Pipe & Tubes), ASTM B 514, ASTM B 775, ASME SB 514, ASME SB 775 (Welded Pipe), ASTM B 515, ASTM B 751, ASME SB 515, ASME SB 751(Welded Tubes), ASME Code Case1325 (All Product Forms), ASME N-20 (Cold Worked Seamless Condenser and Heat Exchanger Tubes for Nuclear Service), BS 3074NA15 (Seamless Pipe & Tubes), VdTÜV 412 (All Products), ISO 6207 (Seamless Tubing).

Incoloy 800 Maching

Incoloy 800 is an ideal alloy for machining. With its high tensile strength, outstanding oxidation resistance, and excellent formability, Incoloy 800 can be used to create precision parts with ease. Since this highly durable alloy does not rapidly corrode or oxidize when in contact with water or air, it ensures the durability of machined parts created from it. Furthermore, it machineability is characterized by lower levels of tool wear, smooth cutting action and higher feed rates than other materials which makes it an ideal option for industries that prioritize efficiency and accuracy. Therefore, it’s no wonder Incoloy 800 is a popular choice amongst machine shops seeking precision results.

Incoloy 800 Price

Incoloy 800 is an iron-nickel-chromium alloy that offers many advantages thanks to its high strength and corrosion resistance, making it a desirable material for many industries. This useful alloy does come at a cost though; due to its durability and versatile usage the price of Incoloy 800 material can be quite high. Whether you choose to buy in bulk or order a few small items, you’ll typically need to invest a bit more money than you would with other materials. That said, there are always discounts available for larger orders and evaluations that determine the most cost-effective solution for buyers.

Incoloy 800 Heating Element

N08800 is a versatile alloy that has many uses and benefits. Its density is relatively low, but its strength is impressive, making it well-suited for use as a heating element in industrial settings. Incoloy 800 has good corrosion resistance and retains strength even at high temperatures, making it particularly suited for heaters requiring higher temperatures than typical industrial settings. The alloy resists oxidation and carburization, making it capable of lasting in harsh conditions while retaining its properties when subjected to extreme vibration and shock loads. This makes Incoloy 800 an ideal material for use as a heating element in a variety of applications.

Incoloy 800 Welding Procedure

Incoloy 800 welding is a complex process that must be performed with extreme precision and attention to detail for optimal results. Welders need a thorough understanding of the base material and any filler metals used, as well as the best techniques for creating strong joints. The use of a gas-shielded arc welding method with appropriate alloy filler metal sticks is recommended in order to avoid any possible corrosion or stress-related issues from occurring over time. Additionally, preheating before welding and maintaining even temperatures during the welding can help enhance weld characteristics, allowing for greater weld strength and longer operational run times for the finished product. With careful consideration of all these factors, those skilled in Incoloy 800 welding can produce dependable joints every time.


In conclusion, Incoloy 800 has a wide variety of uses due to its excellent chemical composition, which gives it superior strength yet still allows for easy welding with standard equipment when making components out of this alloy. Its ability to withstand extreme temperatures makes it ideal for many applications such as heating elements or valves, while its corrosion resistance ensures that it won’t be damaged by exposure to various types of acid over time like other metals would be prone to if not properly protected against corrosion during manufacture or installation into serviceable components such as those found within nuclear power plants or chemical processing facilities alike where reliable operations are paramount no matter what environment they find themselves operating within day after day!

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