Incoloy 800: Complete Properties & Application Guide

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Overview

Incoloy 800 (UNS N08800 / W.Nr. 1.4876) is a nickel-iron-chromium alloy with good strength and excellent resistance to oxidation and carburization at elevated temperatures. The alloy maintains a stable austenitic structure and offers good resistance to many sulfur-containing atmospheres.

Chemical Composition

The chemical composition of Incoloy 800 is carefully controlled to achieve its unique combination of properties and performance characteristics.

Element	Min %	Max %
Nickel (Ni)	30.0	35.0
Iron (Fe)	39.5	Balance
Chromium (Cr)	19.0	23.0
Carbon (C)	—	0.10
Aluminum (Al)	0.15	0.60
Titanium (Ti)	0.15	0.60
Manganese (Mn)	—	1.5
Silicon (Si)	—	1.0

Mechanical Properties at Room Temperature

The mechanical properties of Incoloy 800 vary depending on product form and heat treatment condition. The data below represents typical values for solution-annealed material.

Property	Value
Tensile Strength	520 MPa
Yield Strength (0.2% offset)	205 MPa
Elongation in 2 inches	45%
Density	7.94 g/cm3
Melting Point	1385 °C
Max Service Temperature	980 °C

Corrosion Resistance

Good resistance to oxidation, carburization, and sulfidation at elevated temperatures. Resistant to stress corrosion cracking in chloride environments. The alloy performs well in steam and steam-air mixtures, making it ideal for steam generator tubing.

Applications

The unique combination of properties makes Incoloy 800 suitable for a wide range of demanding applications:

• Heat Exchangers: Shell-and-tube heat exchangers for petrochemical and power generation.
• Steam Generation: Superheater and reheater tubing in steam generators.
• Petrochemical: Catalyst tubing and furnace components in refineries.
• Nuclear Power: Steam generator tubing in nuclear power plants.
• Chemical Processing: Process piping and vessels handling hot corrosive fluids.

Available Product Forms

Hangbo Alloy Group manufactures and supplies Incoloy 800 in the following product forms, conforming to ASTM, AMS, and ASME specifications:

• Round Bars: Diameters from 6 mm to 300 mm, hot-finished or cold-drawn, solution annealed.
• Seamless Tubes & Pipes: Sizes from 6 mm OD to 219 mm OD, various wall thicknesses.
• Plates & Sheets: Thicknesses from 0.5 mm to 50 mm, hot-rolled or cold-rolled.
• Forgings: Custom flanges, rings, discs, and complex shapes per customer drawing.
• Welding Wire: Diameters 0.8 mm to 5.0 mm, precision-wound coils and spools.

Related Standards

Standard	Description
ASTM B407	Seamless Pipe and Tube
ASTM B409	Plate, Sheet, and Strip
ASTM B408	Bar and Rod
ASTM B564	Forgings
ASTM B366	Fittings
ASME SB-407	Pressure Vessel Code

Contact Us for Incoloy 800

Hangbo Alloy Group maintains extensive inventory of Incoloy 800 in all standard product forms. We can provide mill test certificates, third-party inspection reports (SGS, TUV), and custom processing services.

For quotations, material certifications, or technical consultation, contact our sales team or call +86-136-1165-6360. We typically respond within 10 minutes.