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This Nickel-Chromium-Iron alloy has the same basic composition as Incoloy 800, but has significantly higher creep rupture strength, resultant from the close control of the carbon, aluminium and titanium contents. It has good strength and excellent resistance to oxidation and carburisation in high temperature atmospheres. It also resists corrosion in many aqueous environments.
Incoloy® 800HT is also known as Nicrofer 3220 HP.
|Chemical Composition||Specifications||Designations||Key Features||Typical Applications|
|BS 3076 NA 15H||W.Nr 1.4958
|Higher creep rupture strength than Incoloy 800 due to close control of C, Al, Ti
Excellent resistance to oxidation and carburisation at high temperatures
Corrosion resistant in many aqueous environments
High temperature static applications**
Heat Treating Equipment
|Density||7.94 g/cm³||0.287 lb/in³|
|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|
|Annealed or Spring Temper||Stress Relieve||450 – 470||840 – 880||0.5 – 1||Air|
|Condition||Approx. tensile strength||Approx. operating temperature depending on load** and environment|
|Annealed||600 – 800||87 – 116||-200 to +1000||-330 to +1830|
|Spring Temper||800 – 1100||116 – 159||-200 to +1000||-330 to +1830|
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