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.

Stock program

Bars

Standard lengths of 2000 mm up to 6000 mm. Cut to size on request (tolerance +2/-0 mm). 

        Ø

2.50 mm              
4.75 mm              
6.35 mm              
9.52 mm              
12.00 mm              
16.00 mm              
20.00 mm              
25.40 mm              
31.75 mm              

Sheets / Plates

Dimensions: widths 1000/1220/1500 mm, lengths 2000/2500/3000 mm.

Thickness:

0.25 mm              
0.50 mm              
0.63 mm              
1.00 mm              
1.50 mm              
2.03 mm              
3.18 mm              
4.76 mm              
6.35 mm              
9.52 mm              
12.70 mm              
15.88 mm              
19.05 mm              
25.40 mm              
38.10 mm              
Limiting
Fe   Balance  
Ni¹   42.00 %
Co max. 1.00 %
Mn max. 0.80 %
Si max. 0.30 %
Cr max. 0.25 %
Al max. 0.15%  
C max. 0.05 %
S max. 0.035 %
P max. 0.025 %

¹ Nominal value; adjusted to meet expansion requirements.

Density
g/cm³   8.11
lb/in³   0.293