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.
| 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 |
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 |