ALLOY 36, 42, 48 (Controlled-Expansion
and Glass-Sealing)Alloy Description
The ALLOY 36, 42, 48 are nickel, iron controlled expansion alloys with high magnetic permeability.
Alloy 36 has near zero coefficient of thermal expansion at room temperature and till 100 °C. Used in instrumentation and in thermostats.
Alloy 42 has low expansion till 300 °C and it matches the expansion of soft glass. Used in lead wires for electronic applications and for core of Dumet wire (glass sealing part in lead-in-wires for electric lamps).
Alloy 48 has expansion that matches soda-lead and soda lime glass. Leads for electronic applications.
Condition of Supply
- Cold Drawn, Spring Temper.
- Cold Drawn, Annealed.
Specifications
| Alloy | Werkstoff Nr | UNS Designation | ASTM |
|---|---|---|---|
| Alloy 36 | 1.3912 | K 93600 | B 753 |
| Alloy 42 | 1.3917 | K 94000 | F 29 |
| Alloy 48 | 1.3922 | K 94800 | F 30 |
Nominal Composition
| Alloy 36 | Alloy 42 | Alloy 48 | |
|---|---|---|---|
| Nickel | 36% | 42% | 48% |
| Iron | balance | balance | balance |
Size Range
Wires: 10 mm diameter to 0 .15mm diameter. (0.393" diameter to 0.0059" diameter).
Strips: Width 0.4-100 mm, Thickness: 0.10 mm and above.
Typical Physical Properties
| Thermal Expansion : Mean Coefficient x 0.0000010 K/°C | Alloy 36 | Alloy 42 | Alloy 48 |
|---|---|---|---|
| 20-100 | 1.5 | 5.3 | 8.5 |
| 20-200 | 2.6 | 5.3 | 8.6 |
| 20-300 | 5.5 | 5.3 | 8.7 |
| 20-400 | 8.4 | 6.2 | 8.8 |
| 20-500 | 10.1 | 8.0 | 9.1 |
Note: Other Grades of controlled expansion and glass sealing alloys are also available. Please contact us for more information.
