Description
Invar (also know as Invar 36, NILO 36, Pernifer 36, and Invar Steel) is a low expansion alloy consisting of 36% Nickel, balance Iron. Invar Alloy exhibits extremely low expansion around ambient temperatures, making Invar Alloy particularly useful in applications where minimum thermal expansion and high dimensional stability is required, such as in precision instruments like optoelectronic devices, optical and laser benches, electronics, and other kinds of scientific instruments.
Application
This alloy has been used for applications where dimensional changes due to temperature variation must be minimized such as in radio and electronic devices, aircraft controls, optical and laser system, etc.
parameter
Cross Reference
Russia | USA | Japan | France | Germany | U.K. |
36H | Invar | Cactus LE | Invar Standard | Vacodil36 | Invar |
Nilvar | Nilo36 | ||||
36H-ВИ | Unipsan36 | Fe-Ni36 | Nilos36 | 36Ni |
Typical chemistry
C | Si | P | S | Mn | Ni | Fe |
≤ | ||||||
0.05 | 0.30 | 0.020 | 0.020 | 0.20~0.60 | 35.0~37.0 | Balance |
Typical Physical Properties
Density | lb/cu in | 0.291 |
Specific Gravity | 0.825 | |
Curie Temp | °F | 535 |
°C | 279 | |
Melting Point | °F | 2600 |
°C | 1427 | |
Electrical | Micro-ohm-cm | 84 |
Resistivity | Micro-ohm-cm | 495 |
Thermal | W/cm °C | 0.10 |
Conductivity | BTU-in/sq. ft-hr- | 72.6 |
Specific Heat | Cal/g- °C | 0.123 |
BTU/lbm- °F | 0.123 |
Average Coefficient of Linear Expansion
Mean Coefficient of linear expansion at different temperature, ā/(10-6/K)
Size Range
Sheet | Thickness:0.10mm~3.50mm, width: ≤300mm |
Plate | Thickness:3.5mm~40.0mm, width: ≤500mm |
Round wire | Thickness:0.10mm~5.0mm |
Flat Wire | Dia 0.5mm~Dia 5.0mm, length≤1000 |
Rod | Dia 5.0mm~Dia 8.0mm, length≤2000 |
Dia 8.0mm~Dia 32.0mm, length≤2500 | |
Dia 32.0mm~Dia180.0mm, length≤1000 | |
Capillary | OD 8.0mm~1.0mm,ID 0.1~8.0 length≤2500 |
Pipe | OD 120mm~8.0mm,ID 8.0~129 length≤4000 |
Condition: (With max tolerance) cold rolled, cold drawn, hot rolled , hot forging ,peeled turned ,bright ,bright annealed