These are nickel-iron based alloys that are required for applications where a hermetic seal is required between metal and glass or ceramic. They are also used for applications where a certain thermal expansion is required over a given temperature range. Examples of such applications are light bulbs, vacuum tubes, optoelectronics, etc.
Alloy 36 This grade exhibits near zero coefficient of thermal expansion from room temperature to 100 °C. It is used for applications that cannot tolerate any dimensional changes due to temperature changes. It finds use in precision laser measurement equipment, electronic devices, instrumentation, thermostats, and in antenna/aerial technologies. Another common usage is for making the low expansion part of bimetallic thermostats.
Alloy 42 has a constant low rate of thermal expansion up to temperatures approaching 350 °C. The thermal coefficient of expansion of this alloy matches that of soft glass. As a result, it is used for glass-sealing applications in microelectronic components and vacuum devices. Alloy 42 is also used as the core of Dumet wire, which forms the glass-sealing component of the lead-in-wires used in electric light bulbs. This alloy is also used for thermostats and thermo switches.
Alloy 48 has a thermal expansion coefficient which matches that of soda-lime glass. It is widely used for electric wiring in glass-to-metal connections. It is also used in thermostats for industrial applications up to 450 °C.
Alloy 52 is also a glass-to-metal sealing alloy that is used in compact fluorescent lamps (CFL) and other electronic applications.
Alloy 54 is also a glass-to-metal sealing alloy that is used in compact fluorescent lamps (CFLs), special auto lamps, and other electronic applications.
Note: Other variants with customer specified Nickel content can also be manufactured. Please contact JLC for more details.
|Alloy||Werkstoff Nr||UNS designation||ASTM||Ni||Fe|
|Alloy||Density||Electrical Resistivity at 20 °C||Tensile Strength||Elongation|
|g/cm³||µΩ-cm||N/mm²||% at L0=100 mm|
|Alloy||Temperature Range (°C)|
|Alloy 36||1.5 - 2.0||Supplied in custom lengths|
|Wire||0.3 - 10.0||-|
Click here to download this data sheet in PDF format.