4J32 alloy, also known as Super Invar alloy, is a low expansion iron nickel cobalt alloy.
Brand comparison:
4J32, Super-Invar32-5, SI, Invar.
Chemical composition:
| C | Si | P | S | Cu | Mn | Co | Ni | Fe |
| ≤ | ||||||||
| 0.05 | 0.20 | 0.020 | 0.020 | 0.4-0.8 | 0.2-0.6 | 3.2-4.2 | 31.5-33.0 | Remainder |
Linear thermal expansion:
| 20-50℃ | 20-100℃ | 20-200℃ | 20-300℃ | 20-400℃ | 20-500℃ |
| 0.7 | 0.8 | 1.4 | 4.3 | 7.2 | 9.3 |
Main purpose:
Suitable for various instruments, instrument components, thermal bimetallic passive layers, and resonant cavities that require dimensional stability.
Main features:
Low expansion coefficient within the range of 20-100 ℃.
Supply form: steel plate, steel strip, steel rod, steel pipe, steel wire.
