Peeled Ni42 Rod

N42 is a 42% nickel-iron controlled expansion alloy which has been used in a wide variety of glass-to-metal sealing applications

NILO® Alloy 42  1.3917  UNS K94100

 

A nickel-iron controlled-expansion alloy containing 42% nickel. It has a low and nominally constant coefficient of thermal expansion from room temperature to about 570°F (300°C). Used for semiconductor lead frames in integrated circuits, bi-metal thermostat strip, thermostat rods, for ceramic-to-metal seals with alumina ceramics, and various glass-to-metal seals such as the core of copper-clad wire for sealing into glass envelopes of electric bulbs, radio valves, television tubes, and fluorescent lights.

 

FeNi42 (for example NILO alloy 42), has a nickel content of 42% and α ≈ 5.3 ppm/°C which matches that of silicon and therefore is widely used as lead frame material for electronic components, integrated circuits, etc.

 

Chemical Composition:

C: 0.05

P: 0.020

S: 0.020

Mn: 0.80

Si: 0.30

Al: 0.10

Co: 1.0

Ni: 41.5~42.5

Fe: Balance

 

Average Coefficient of Linear Expansion a /(10-6/K):

20~100°C: 5.6

20~200°C: 4.9

20~300°C: 4.8

20~400°C: 5.9

20~450°C: 6.9

20~500°C: 7.8

20~600°C: 9.2

 

Applications:

Alloy 42 has been used for the glass-to-metal seals in electronic tubes, automotive and industrial lamps, transformer and capacitor bushings and other glass-to-metal and ceramic-to-metal applications.

 

Forms:

We can supply these products in all forms including wire, ribbon, strip, sheet and foil. You also can send your custom Dimensions and Tolerances by email or phone us.