HPM® Ni 42 is a Nickel-Iron alloy with a thermal expansion coefficient suitable for matching to the ceramic chip in numerous miniature electronic circuits
The alloy is readily formed from the annealed temper and can be welded or brazed by standard methods. The alloy is not corrosion resistant at 20°C when exposed to a moist or salt-containing atmosphere.
Available Sizes:
HPM® Ni 42 is available from Hamilton Precision Metals as strip product in thicknesses from 0.001” to 0.050” (0.0254 mm to 1.27 mm) in widths up to 12.0” (304.8 mm). The material conforms to ASTM F30 and UNS K94100.
Nominal Composition
| HPM® Ni 42 NOMINAL COMPOSITION |
| Nickel |
41.0%
|
| Manganese |
0.40%
|
| Silicon |
0.20%
|
| Iron |
Balance
|
Mechanical Properties
| HPM® Ni 42 MECHANICAL PROPERTIES |
|
ANNEALED |
COLD ROLLED |
| Ultimate Tensile Strength |
72,000 PSI |
110,000 PSI
|
| Yield Strength (0.2% Offset) |
40,000 PSI |
105,000 PSI
|
| Elongation in 2” * |
35%
|
5%
|
| Modulus of Elasticity (Tension) |
21 X 106
PSI
|
- |
| Poisson’s Ratio |
0.25
|
- |
*The measured elongation will be less as thickness decreases to 0.002” and less.
These values may be adjusted by control of process variables – consult HPM for desired values
Physical Properties
| HPM® Ni 42 PHYSICAL PROPERTIES |
| Density |
0.293 lbs/cu.in. |
| Melting Point (Approx.) |
1440°C |
| Electrical Resistivity @ R.T. |
70 Microhm·cm
|
|
Temperature Coefficient of Resistivity (20° to 100°C)
|
2500 PPM/°C
|
| Thermal Expansion Coefficient (30° to 400°C) |
6.0 X 10-6/°C
|
| Thermal Conductvity @ R.T. |
14.5 W/m·K |
| Curie Temperature |
375°C
|
| Magnetic Attraction |
Yes |
Typical values to guide alloy selection but are not a guarantee of minimum or maximum.