Controlled-expansion nickel-iron alloys
Controlled-expansion nickel-iron alloys are materials formulated to provide predictable thermal expansion and good dimensional stability. They are used for glass-to-metal seals, electronic packages and precision instruments where limiting thermal mismatch is important.
| Grade | Material no. | C | Si | Mn | Fe | Ni |
|---|---|---|---|---|---|---|
| FCDLE1 | — | — | — | — | — | — |
| SCLE1 | — | — | — | — | — | — |
| FCLE1 | — | — | — | — | — | — |
| FCLE4 | — | — | — | — | — | — |
| FCDLE4 | — | — | — | — | — | — |
| SCLE4 | — | — | — | — | — | — |
| FCLE3 | — | — | — | — | — | — |
| FCDLE3 | — | — | — | — | — | — |
| SCLE3 | — | — | — | — | — | — |
| FCLE2 | — | — | — | — | — | — |
| FCDLE2 | — | — | — | — | — | — |
| SCLE2 | — | — | — | — | — | — |
| Ni36 | 1.3912 | ≤0,10\n(≤0,05) | ≤0,50\n(≤0,03) | ≤0,50 | Rest/Bal. | 35,0-37,0 |
| Ni42 | 1.3917 | ≤0,05 | ≤0,30 | ≤1,00 | Rest/Bal. | 41,0-43,0\n(40,0-43,0) |
| Ni48 | 1.3922 | ≤0,05 | ≤0,30 | ≤0,50 | Rest/Bal. | 46,0-49,0 |
Standards covering this category
7Property ranges
4| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| Rm | N/mm² | 120 | 370 | 12 |
| Re | N/mm² | 180 | 200 | 8 |
| A | % | 7 | 10 | 8 |
| rho | g/cm³ | 7.85 | 8.2 | 3 |
Derived from 12 grades in this category with a recorded value.
Composition range
5| Property | Unit | Min | Max | Grades |
|---|---|---|---|---|
| C | % | 0.05 | 0.05 | 2 |
| Si | % | 0.3 | 0.3 | 2 |
| Mn | % | 0.5 | 1 | 3 |
| Fe | % | 50.15 | 54 | 1 |
| Ni | % | 35 | 49 | 2 |
Derived from 3 grades in this category with a recorded value.