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Nickel iron alloy invar tube is an iron-nickel-cobalt alloy consisting of 32% nickel, 5% cobalt and a balance of iron. Super inar alloy has the least thermal expansion at room temperature (half that of inar 36 alloy) and has lower thermal expansion properties than inar 36 alloy in the temperature range of 67/203°F (-55/95°C).
Relative Grade:
Super-Invar / - Invar32H-B Super-Nilvar SI Superieur
Grade | UNS | Werkstoff Nr. |
| Invar 36 | K93600 | 1.3912 |
Grade | Density | Melting Point |
| Invar 36 | 8.1 g/cm3 | 1430°C |
Alloy | Linear Coefficient of Thermal Expansion a,10-6/degree | |||||
| 20-50 | 20-100 | 20-200 | 20-300 | 20-400 | 20-500 | |
| Invar 36 | 0.6 | 0.8 | 2.0 | 5.1 | 8.0 | 10.0 |
Seamless Invar Nickel Iron Alloy Tube Picture:
Seamless Invar Nickel Iron Alloy Tube is suitable for the applications who require low coefficient of expansion, such as production, storage and transportation of liquid gas, temperature regulation devices working below 200°C, aperture mask, unit frameworks working below -200°C and so on.
Chemical Composition
Grade | C% | Si% | P% | S% | Mn% | Ni% | Fe% |
| Invar 36 | Max 0.05 | Max 0.30 | Max 0.020 | Max 0.020 | 0.20-0.60 | 35.0-37.0 | Bal. |