Cyfansoddiad Cemegol mewn %, Invar
| brand | Cyfansoddiad cemegol | ||||||||
| Ni | Fe | C | P | Si | Co | Mn | Al | S | |
| ≤ | |||||||||
| 4j42 | 41.5~42.5 | Bal | 0.05 | 0.02 | 0.3 | - | 0.80 | 0.10 | 0.02 |
| 4j45 | 44.5~45.5 | Bal | 0.05 | 0.02 | 0.3 | - | 0.80 | 0.10 | 0.02 |
| 4j50 | 49.5~50.5 | Bal | 0.05 | 0.02 | 0.3 | 1.0 | 0.80 | 0.10 | 0.02 |
| 4j52 | 51.5~52.5 | Bal | 0.05 | 0.02 | 0.3 | - | 0.60 | - | 0.02 |
| 4j54 | 53.5~54.5 | Bal | 0.05 | 0.02 | 0.3 | - | 0.60 | - | 0.02 |
Cysonion ffisegol sylfaenol a phriodweddau mecanyddol yr aloi:
| brand | Dargludedd thermol | Capasiti gwres penodol | Dwysedd | Gwrthiant trydanol | Pwynt Curie |
| 4j54 | 18.8 | 502J | 8.28 | 0.42 | 530 |
| Nodwedd ehangu nodweddiadol (10 -6 / ºC) | ||||||||
| Ystod tymheredd | 20~100 | 20~200 | 20~300 | 20~350 | 20~400 | 20~450 | 20~500 | 20~600 |
| Cyfernod ehangu | 10.7 | 12.7 | 10.7 | 10.7 | 10.8 | 10.3 | 10.8 | 11.2 |
Defnyddir aloi 4 j54 yn bennaf ar gyfer a mica, gwydr selio meddal
150 0000 2421