4J45
4J45 is a precision alloy with exceptional thermal expansion properties. It has been widely used in the electronic industry, precision measurement tools, precision instruments, cryogenic engineering, etc.
Chemical Composition
| C % | P % | S % | Mn % | Si % | Al % | Ni % | Fe % |
Min. | - | - | - | - | - | - | 44.5 | Bal. |
Max. | 0.05 | 0.02 | 0.02 | 0.80 | 0.30 | 0.10 | 45.5 |
Mechanical properties
| Status | Tensile strength (MPa) |
Strip | soft state | <590 |
hard state | >700 |
Linear thermal expansion
20-100℃ | 20-200℃ | 20-300℃ | 20-400℃ | 20-450℃ | 20-500℃ |
7.5 | 7.5 | 7.1 | 7.2 | 7.1 | 8.3 |
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