HPM® Ni 36 is a Nickel-Iron alloy with the lowest thermal expansion of any active alloy from -240°C to 330°C. It is selected when dimensional changes from temperature
variation need to be minimized in electronic control devices, such as use within airbag igniters and precision metal stampings.
The alloy can be readily formed from the annealed temper.Annealed hardness can be modified to approximately DPH 180 for best blanking characteristic. Grain size
can be adjusted to provide the optimum deep drawing characteristic. It can be welded and brazed using conventional methods.
Available Sizes:
HPM® Ni 36 is available from Hamilton Precision Metals as strip product in thicknesses from 0.0005” to 0.025” (0.0127 mm to 0.635 mm) in widths up to 12.0” (304.8 mm). It is also available in foil as thin as 0.000100” (0.00254 mm) in widths of 4.0” (101.6 mm) maximum. The metal conforms to
UNS K93603, ASTM F1684.
Nominal Composition
| HPM® Ni 36 NOMINAL COMPOSITION |
| Nickel |
36%
|
| Manganese |
0.30%
|
| Carbon |
0.01%
|
| Iron |
Balance
|
Mechanical Properties
| HPM® Ni 36 MECHANICAL PROPERTIES |
|
ANNEALED |
COLD ROLLED |
| Ultimate Tensile Strength |
70,000 PSI |
130,000 PSI
|
| Yield Strength (0.2% Offset) |
40,000 PSI |
125,000 PSI
|
| Elongation in 2” * |
35%
|
2%
|
| Modulus of Elasticity (Tension) |
21 X 106
PSI
|
- |
| Poisson’s Ratio |
0.295
|
- |
*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 36 PHYSICAL PROPERTIES |
| Density |
0.291 lbs/cu.in. |
| Melting Point (Approx.) |
1425°C |
| Electrical Resistivity @ R.T |
82 Microhm·cm |
|
Temperature Coefficient of Resistivity (20° to 100°C)
|
1100 PPM/°C
|
| Thermal Expansion Coefficient (20° to 200°C) |
1.05 X 10-6/°C
|
| Thermal Conductivity @ 100°C |
10.5 W/R.T.
|
| Curie Temperature |
280°C |
| Magnetic Attraction |
Yes |
Typical values to guide alloy selection but are not a guarantee of minimum or maximum.