General Description

Incoloy 800 is a nickel-iron-chromium alloy with good strength and excellent resistance to oxidation and carburization in high-temperature atmospheres.

A high chromium content gives Incoloy 800 good resistance to oxidation. It also resists many aqueous media and is relatively free from stress-corrosion cracking. Incoloy 800 has excellent resistance to nitric acid at concentrations up to approximately 70% and at temperatures up to the boiling point. It also has good resistance to organic acids, such as formic, acetic, and propionic. It resists a variety of oxidizing and nonoxidizing salts, but not halide salts.

Typical applications are heat treating equipment, petrochemical pyrolysis tubing and piping systems, sheathing for electrical heating elements, food processing equipment.

Chemical Composition

Grade Ni% Cr% Fe% C% Mn% S% Si% Cu% Al% Ti%
Incoloy 800 30.0-35.0 19.0-23.0 Min 39.5 Max 0.10 Max 1.50 Max 0.015 Max 1.0 Max 0.75 0.15-0.60 0.15-0.60


Grade UNS Werkstoff Nr.
Incoloy 800 N08800 1.4876

Physical Properties

Grade Density Melting Point
Incoloy 800 8.0 g/cm3 1350°C-1400 °C

Mechanical Properties

Grade Tensile Strength Yield Strength Elongation
Incoloy 800 520 N/mm² 205 N/mm² 30%

Welding of Incoloy 800

Any traditional welding procedures can be used to weld Incoloy 800 to similar alloys or other metals, such as gas tungsten arc welding(GTAW), plasma arc welding (PAW), metal inertia gas welding (MIG) and so on. Before welding, remove scale, grease, mark and imprint.

Recommend filler wire regarding welding Incoloy 800: ERNiCrMo-3

Size Range

Incoloy 800 wire, bar, rod, strip, forging, plate, sheet, tube, fastener and other standard forms are available.

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