N52 is an iron-nickel controlled expansion alloy suitable to soft glass sealing, with optimal chemical composition to obtain hermetic seals. Typical applications are hermetic feedtroughs, reed relays.
Equal grades:
ASTM F30
UNS N14052
DIN 17745
W 2.4478
A54-301
Alloy 52
4J50
N52
Chemical composition
| Element | Ni | Mn | Si | C | Cr | Co | P | S | Al | Fe |
| Wt, % | 50.0-51.0 | 0.60 max. | 0.30 max. | 0.05 max. | 0.25 max. | - | 0.025 max. | 0.025 max. | 0.10 max. | Rem |
Applications
Alloy 52 Average Linear Coefficient of Thermal Expansion µm/m • °C | |||
|---|---|---|---|
| Temperature Range °C | UNS N14052 | Temperature Range °C | UNS N14052 |
| 30 to 300 | 10.1 | 30 to 600 | 10.8 |
| 30 to 400 | 9.9 | 30 to 700 | 11.7 |
| 30 to 450 | 9.7 to 10.2* | 30 to 800 | 12.5 |
| 30 to 500 | 9.9 | 30 to 900 | 13.3 |
| 30 to 550 | 10.0 to 10.5* | 30 to 1000 | 14.2 |
Alloy 52 Typical Physical Properties | ||
|---|---|---|
| Density | lb/cu in | 0.30 |
| Specific Gravity | 8.3 | |
| Curie Temp | °F | 986 |
| °C | 530 | |
| Melting Point | °F | 2600 |
| °C | 1427 | |
| Electrical Resistivity | microhms-cm | 43 |
| Thermal Conductivity | W/cm °C | 18 |
| Specific Heat | Cal/g °C | 0.12 |
Alloy 52 Typical Mechanical Properties | ||
|---|---|---|
| Tensile Strength | ksi | 75 |
| MPa | 517 | |
| Yield Strength | ksi | 40 |
| MPa | 276 | |
| Elongation | % in 2 in. | 35 |
| Hardness | Rockwell | 80 |
| Modulus of Elasticity | ksi | 23 |
| MPa | 159 |
Forms of supply
Cold drawn wire
Wire rod
Round bar
Cold rolled strip
Tube
Capillary
Plate


