Firafitra simika amin'ny %, Invar
| marika | Firafitra simika | ||||||||
| Ni | Fe | C | P | Si | Co | Mn | Al | S | |
| ≤ | |||||||||
| 4j42 | 41.5~42.5 | Bala | 0.05 | 0.02 | 0.3 | - | 0.80 | 0.10 | 0.02 |
| 4j45 | 44.5~45.5 | Bala | 0.05 | 0.02 | 0.3 | - | 0.80 | 0.10 | 0.02 |
| 4j50 | 49.5~50.5 | Bala | 0.05 | 0.02 | 0.3 | 1.0 | 0.80 | 0.10 | 0.02 |
| 4j52 | 51.5~52.5 | Bala | 0.05 | 0.02 | 0.3 | - | 0.60 | - | 0.02 |
| 4j54 | 53.5~54.5 | Bala | 0.05 | 0.02 | 0.3 | - | 0.60 | - | 0.02 |
Ireo tsy miovaova ara-batana fototra sy ireo toetra mekanikan'ny firaka:
| marika | Fitondran-tena mafana | Fahafahana hafanana manokana | hakitroky | Fanoherana elektrika | Teboka Curie |
| 4j54 | 18.8 | 502J | 8.28 | 0.42 | 530 |
| Toetra mahazatra amin'ny fivelarana (10 -6 / ºC) | ||||||||
| Elanelana mari-pana | 20~100 | 20~200 | 20~300 | 20~350 | 20~400 | 20~450 | 20~500 | 20~600 |
| Koefisienan'ny fanitarana | 10.7 | 12.7 | 10.7 | 10.7 | 10.8 | 10.3 | 10.8 | 11.2 |
Ny firaka 4 j54 dia ampiasaina indrindra amin'ny fitaratra misy mika sy tombo-kase malefaka.
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