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Incoloy® 800
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Incoloy® 800

Available in any of the 'profile options'

This Nickel-Iron-Chromium alloy has good strength and excellent resistance to oxidation and carburisation in high temperature atmospheres. Incoloy® 800 also resists corrosion in many aqueous environments.

Incoloy® 800 is also known as Nicrofer 3220, Nicrimphy 800, and Pyromet 800.

Chemical Composition Specifications Designations Key Features Typical Applications
Element Min % Max %
Ni 30.00 35.00
Co 2.00
Cu 0.75
Cr 19.00 23.00
Al 0.15 0.60
C 0.10
Si 1.00
Mn 1.50
Ti 0.15 0.60
Fe bal
S 0.015
BS 3075 NA15
BS 3076 NA15
W.NR 1.4876
UNS N08800
AWS 020
Corrosion Resistant at Ambient Temperatures
Precipitation Hardenable
High temperature static applications**
Process Piping
Heat Exchangers
Carburising Equipment
Heating Element Sheathing
Density 7.94 g/cm³ 0.287 lb/in³
Melting Point 1385°C 2525°F
Coefficient of Expansion 14.4 μm/m °C (20 – 100°C) 7.9 x 10-6 in/in °F (70 – 212°F)
Modulus of Rigidity 78.9 kN/mm² 11444 ksi
Modulus of Elasticity 196.5 kN/mm² 28500 ksi
Heat Treatment of Finished Parts
Condition as supplied by Alloy Wire Type Temperature Time (Hr) Cooling
°C °F
Annealed or Spring Temper Stress Relieve 450 – 470 840 – 880 0.5 – 1 Air
Properties
Condition Approx. tensile strength Approx. operating temperature
N/mm² ksi °C °F
Annealed 600 – 800 87 – 116 -200 to +815 -330 to +1500
Spring Temper 800 – 1100 116 – 159 -200 to +815 -330 to +1500

The above tensile strength ranges are typical. If you require different please ask.

* Trade name of Special Metals Group of Companies

** Static applications = still/fixed/motionless/rigid

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