Application And Benefits Incoloy 800 Round Bars

What is incoloy alloy 800?

Designated as UNS N08800 or DIN W.Nr. 1.4876, Incoloy 800 (also known as “Alloy 800”) is an iron-nickel-chromium alloy with good strength and excellent resistance to oxidation and carburization in high-temperature atmospheres. It also has excellent resistance to corrosion by many aqueous environments and resistance to chloride stress-corrosion cracking. Incoloy 800 alloy maintains a stable austenitic structure during prolonged exposure to high temperatures since it doesn’t form the embrittling sigma phase after long time exposure at 1200°F [649°C]. It’s mainly used for petrochemical process piping, heat exchangers, carburizing equipment, heating element sheathing, and nuclear steam generator tubing.

Incoloy 800 Nickel Alloy contains 15%-25% Chromium, 30%-45% nickel, and a small amount of aluminum and titanium. The alloy is capable of remaining stable and maintaining its austenitic structure even after long time exposures to high temperatures.Type Incoloy 800 remains austenite single zone from being subjected to high temperature to rapid cooling, hence its use state keeps single austenite structure.  Other characteristics of the alloy are good strength, and high resistance to oxidizing, reducing and aqueous environments. Incoloy 800 has good strength and excellent resistance to oxidation and carburisation in high temperature atmospheres. Incoloy 800 also resists corrosion in many aqueous environments, and has been used in some steam generation plants due to its resistance to stress cracking. The standard forms in which this alloy is available are bars, pipe, forging, plate, sheet, wire and strip. This blog introduces the characteristics, standards and applications of incoloy 800 bars.

What Incoloy 800 bar?

Incoloy 800 Round Bars are high-temperature, alloy steel bars used in various industrial applications. They are composed of nickel, chromium and iron, giving them superior corrosion resistance. The bars have excellent strength at extreme temperatures up to 1100°C (2000°F) and have good formability when cold worked. They provide excellent heat and oxidation resistance due to the nickel and chromium content, making them a great solution for resisting chemical attacks from many acids. Their unexpected toughness also makes them ideal for pressure vessels in hostile environments such as refineries or thermal processing plants.  

Incoloy 800 round bar is a material that possesses a high level of strength and precision. The material is widely used in high-pressure and high-temperature applications. Incoloy 800 Bars have excellent welding and forming capabilities that have made it a popular choice in the petrochemical industry and offshore operations.

The elemental composition of Incoloy 800 is iron, nickel, and chromium. The composition of these alloys results in a material that exhibits good weldability and corrosion resistance. Despite this, Incoloy 800 round bars are not typically used in applications that require optimum creep-rupture properties. The high nickel content of this material renders it highly resistant to stress-related corrosion cracking. It is also extremely resistant to brittleness and precipitation of the sigma phase. As a result, Incoloy 800 Round Bars have excellent tensile strength and yield strength. JN Alloy factory stocks a large number of Incoloy 800 round bars. If you need them, please contact us.

Incoloy 800 Round Bar Specification

Specification	ASTM B408 UNS N08800, AMS 5766
Standard	ASTM, ASME, API, GB, AISI, DIN, EN, SUS, UNS
Nickel Alloy 800 Round bar size	Diameter: 5~500mm
Inco 800 Alloy Angle bar size	3*20*20mm~12*100*100mm
Alloy 800 Square bar size	4*4mm~100*100mm
DIN 1.4876 Billet Size	1/2" to 495mm Diameter
ASTM B408 UNS N08800 Rectangles Size	33 x 30mm to 295 x 1066mm
Finish	Bright, Polish, Bright, Rough Turned, Grinding, Centreless Ground & Black
Tolerance	H8, H9, H10, H11, H12, H13, K9, K10, K11, K12 or as per clients’ requirements
Surface	Hot Rolled Pickled or Sand Blasting Finished, Cold Drawn, Bright, Polished, Hairline
Condition	Cold Drawnd Pulished Cold Drawn Centreless Ground & Polished, Annealed
Technique	Incoloy N08800 Hot Rolled, Cold Rolled, Cold Drawn, Forged
Where we export	USA, UAE, Malaysia, Poland, Singapore, Canada, Australia, Iran, UK, Italy
Form	Rod, Half-Round, I/H, Round-Rod, Hollow, Blocks, Rings, Round, Precision-Ground, Channel, Billet, Ingot, Forging, Flat, Angle, Profiles, T-Bars, Rectangle, Square, Threaded, Triangle, Hex
Our Incoloy 800 Round Bar conforms to NACE MR0175/ISO 15156

What are the characteristics of the Incoloy 800 round bars?

Mechanical properties

Incoloy 800 Bars have high mechanical strength over a broad temperature range. In general, alloy 800 is used for its strength characteristics at service temperatures up to about 1500 degrees F (816 degrees C).

Corrosion Resistance

Incoloy 800 Bars, like many austenitic stainless steel, can be sensitized, or made susceptible to intergranular attack in some aggressive media, by exposure to the temperature range of 1000 to 1400 degrees F (540–760 degrees C). When Incoloy 800 Round Bars are exposed to heat from welding or other operations, care should be taken to avoid sensitization if the material is to be pickled or subjected to other aggressive environments. Sensitization is not a problem in most high-temperature applications.

Forming

Incoloy 800 Bars exhibits good ductility and hence can be formed using conventional methods. Hot forming of Incoloy Alloy 800 Bars is done in the temperature range of 1600 to 2200 degrees F (870 to 1200 degrees C). Heavy forging should be done at temperatures from 1850 degrees F to 2200 degrees F (1010 degrees C to 1200 degrees C). Forming at temperatures between 1200 and 1600 degrees F (650-870 degrees C) can result in cracking of the bars. The rate of cooling following hot forming is not critical with respect to thermal cracking. However, these Incoloy 800 bars are subject to carbide precipitation in the 1000-1400 degrees F (540- 760 degrees C) temperature range and should be cooled rapidly through that range to avoid sensitization. Cold working may be done on the bars using standard tooling.

What are the applications where bars of Incoloy 800 are used?

Ethylene boiler quenching furnace

Commercial furnaces

Valves, fittings and apparatus that are prone to corrosive attack

Heat treatment facilities

Cracking of hydrocarbons

Vessels under pressure

A mega heater in power plants as well as a re heater

Chemical as well as petrochemical manufacturing

In an application that requires exposure to the corrosive atmosphere as well as elevated temperatures such as the paper pulp industry and nuclear power plants, these alloys are commonly used. For the piping system as well as heat exchangers in nitric acid media, both petrochemicals and chemical processing industries use this alloy mostly where resistance to chloride stress corrosion is necessary. These alloys are used by the power plant as re-heater tubing as well as super heater tubing.