-- Introduction:

Incoloy is a nickel chromium iron alloy designed for oxidation resistance and carbonization at elevated temperatures.

INCOLOY ® Alloy 800H/800HT/800AT is designated as UNS N08810, UNS N08811, and Werkstoff numbers 1.4876, 1.4958, and 1.4959. It is listed in NACE MR0175 Oil and Gas Services.

Incoloy 8, Incoloy 800 H is an iron nickel chromium alloy with the same basic composition as Incoloy 800 and significantly higher creep fracture strength. The higher strength comes from strict control of carbon, aluminum, and titanium content, as well as high-temperature annealing. 800H modification is to control carbon (0.05 to 0.10%) and grain size (>ASTM 5) to optimize stress fracture performance. Incoloy 800 H further modified the total content of titanium and aluminum (0.85 to 1.2%) to ensure optimal high-temperature performance. The alloy is two-factor authentication and combines two forms of properties.

Chemical equilibrium makes the alloy show excellent resistance to carburization, oxidation and nitridation atmosphere. Even if used for a long time in the range of 1200 to 1600 degrees Fahrenheit where many stainless steels become brittle, 800HT will not become brittle. 800HT exhibits excellent cold forming properties typically associated with nickel chromium alloys. When cold forming is widespread, the grain size will produce a clearly undulating surface called "orange peel". 800HT can be welded using commonly used techniques on stainless steel.

Typical applications of this alloy include ethylene pyrolysis, hydrocarbon cracking, vinyl chloride, diphenol, and acetic acid cracking furnaces. This alloy is also used for valves, fittings, and other components that are subject to corrosion and erosion at 1100 to 1800 degrees Fahrenheit.

-- Chemical composition

View the chemical composition of Incoloy 800 »

-- Physical parameters

Density (Mg/m) ->7.95 (usually calculated as 8)

Melting point (℃) ->1357-1385

Specific heat (J/Kg. ℃) ->460

Resistivity（ μ Ω.m）-> 0.989

-- Implementing American Standards

Plate ASTM B409

Bar ASTM B408

Seamless pipes ASTM B407, ASTM B163

Welded pipes ASTM B514, ASTM B515

-- The difference between Incoloy and Inconel

Incoloy and Inconel both belong to the same high-temperature alloy family, but there are some subtle differences between these two metals. Incoloy and Inconel have slightly different compositions and can be used for different types of applications. Inconel contains more than 50% nickel, which makes it more expensive than Incoloy metal. Incoloy has higher iron content and lower Total cost of ownership.