Sealing FeNi Low Expansion Alloys For Electric Vacuum Industry
Price:
USD 21-USD39/KGS
MOQ:
30kg
Delivery Time:
15 workdays
Brand:
Ohmalloy
Product Description
(Common Name:50H, N50, Vacovit 500, FeNi50)
4J50 alloy is mainly composed of iron, nickel elements. It is characterized with a fixed coefficient of expansion. Increase the thermal expansion coefficient and the Curie point with increase of nickel content.
4J50 alloy is widely used the structure of the sealing material in the electric vacuum industry.
Normal composition%
| Ni | 49.5~50.5 | Fe | Bal. | Co | 1.0 | Si | ≤0.3 |
| Mo | - | Cu | - | Cr | - | Mn | ≤0.8 |
| C | ≤0.05 | P | ≤0.02 | S | ≤0.02 | Al | ≤0.1 |
Typical Physical properties
| Density (g/cm3) | 8.21 |
| Electrical resistivity at 20℃(Ωmm2/m) | 0.44 |
| Thermal conductivity, λ/ W/(m*℃) | 16.7 |
| Curie pointTc/ ℃ | 500 |
| Elastic Modulus, E/ Gpa | 158 |
Coefficient of expansion
| θ/℃ | α1/10-6℃-1 | θ/℃ | α1/10-6℃-1 |
| 20~100 | 9.8 | 20~400 | 9.4 |
| 20~200 | 9.8 | 20~450 | 9.4 |
| 20~300 | 9.5 | 20~500 | 9.7 |
| 20~350 | 9.4 | 20~600 | 10.6 |
Typical Mechanical properties
| Tensile Strength | Elongation |
| Mpa | % |
| 490 | 35 |
The heat treatment process
| Annealing | Heated to900 ±20℃in a hydrogen atmosphere |
| Holding time, h | 1 hour |
| cooling | With speed not more than 5 ℃ / min. cooling to below 200 ℃ |
Style of supply
| Alloys Name | Type | Dimension | |
| OhmAlloy-4J50 | Wire | D=0.1~8mm | |
| OhmAlloy-4J50 | Strip | W= 5~250mm | T= 0.1mm |
| OhmAlloy-4J50 | Foil | W= 10~100mm | T= 0.01~0.1 |
| OhmAlloy-4J50 | Bar | Dia=8~100mm | L=50~1000 |
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Company
Ohmalloy Material Co.,Ltd
Location
Room 311, No.1211, Mudanjiang Road, Baoshan district, Shanghai
Contact Person
Qiu