Incoloy 800 (UNS N08800)

Nickel-Iron-Chromium Alloy Designed For Excellent High-Temperature Strength, Oxidation Resistance, And Long-Term Stability In Extreme Thermal Environments.

Alloy 800 UNS N08800 2.4876 ASTM B163 / B407 / B408 / B514 / B564

Introduction of Incoloy 800 Alloy

Incoloy 800 (UNS N08800, Alloy 800) is a nickel-iron-chromium alloy designed for excellent high-temperature strength, oxidation resistance, and carburization resistance.

It is widely used in chemical processing, petrochemical, heat treatment, and power generation industries where oxidation resistance alloy, heat resistance alloy, and carburization resistance alloy performance is required.

Chemical Composition (%)

Nickel (Ni)	30.0–35.0
Chromium (Cr)	19.0–23.0
Iron (Fe)	Balance
Carbon (C)	≤0.10
Manganese (Mn)	≤1.5
Silicon (Si)	≤1.0
Aluminum (Al)	0.15–0.60
Titanium (Ti)	0.15–0.60

Mechanical Properties

Tensile Strength	≥520 MPa
Yield Strength	≥210 MPa
Elongation	≥30%
Hardness	≤180 HB
Condition	Annealed

Key Features of Alloy 800

High Temperature Strength

Stable performance in high temperature alloy environments.

Oxidation Resistance

Excellent oxidation and scaling resistance.

Carburization Resistance

Suitable for carburization resistance alloy conditions.

Thermal Fatigue Resistance

Performs well under cyclic thermal stress.

Physical Properties

Density	7.94 g/cm³
Melting Range	1350–1400°C
Thermal Conductivity	11.5 W/m·K
Electrical Resistivity	0.99 μΩ·m
Elastic Modulus	196 GPa

Product Forms & Standards

Product Form	ASTM Standard	UNS	Condition	Typical Application
Seamless Pipe	ASTM B407	N08800	Annealed	Petrochemical Heaters, Process Piping
Welded Pipe	ASTM B514	N08800	Annealed	Industrial Piping Systems
Seamless Tube	ASTM B407	N08800	Annealed	Heat Exchangers, Condensers
Heat Exchanger Tube	ASTM B163	N08800	Annealed	Heat Transfer Equipment
Welded Tube	ASTM B515	N08800	Annealed	Instrumentation & Process Systems
Plate / Sheet / Strip	ASTM B409	N08800	Annealed	Furnace Components, Thermal Equipment
Bar / Rod	ASTM B408	N08800	Hot Finished / Annealed	Structural & Machined Parts
Forgings	ASTM B564	N08800	Solution Annealed	High Temperature Components
Flanges	ASTM B564	N08800	Annealed	Pressure Piping Systems
Pipe Fittings	ASTM B366	N08800	Annealed	Elbows, Tees, Reducers

Typical Applications of Alloy 800 Pipe/Tube/Plate/Sheet/Rod/Bar

Heat Treatment

Furnace fixtures and components

Petrochemical

Cracking and process systems

Power Generation

Boilers and heat exchangers

Available Incoloy 800 Products

Incoloy 800 Pipe & Tube

Seamless and welded pipes. Heat exchanger tubing

Incoloy 800 Sheet & Plate

Incoloy 800 sheet and plate as raw materials

Incoloy 800 Bar & Rod

Round bars and rods on stock

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