Ohmalloy Material Co.,Ltd
| Payment Terms | L/C, T/T |
| Delivery Time | 15 workdays |
| Packaging Details | coil |
| Material | FeNi |
| Shape | strip |
| Application | sealing material |
| Chemical composition | Ni Fe Co V |
| Product name | 4J50 |
| Density | 8.21g/cm3 |
| Standard | GB ASTM AISI,ASTM/ASME/AISI/GB/DIN |
| Color | Silvery White,bright |
| Surface | Bright |
| Feature | low coeffficient of expansion from Cryogenic temperature |
| Brand Name | Ohmalloy |
| Model Number | 4J50 |
| Certification | ISO CE |
| Place of Origin | China |
View Detail Information
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Product Specification
| Payment Terms | L/C, T/T | Delivery Time | 15 workdays |
| Packaging Details | coil | Material | FeNi |
| Shape | strip | Application | sealing material |
| Chemical composition | Ni Fe Co V | Product name | 4J50 |
| Density | 8.21g/cm3 | Standard | GB ASTM AISI,ASTM/ASME/AISI/GB/DIN |
| Color | Silvery White,bright | Surface | Bright |
| Feature | low coeffficient of expansion from Cryogenic temperature | Brand Name | Ohmalloy |
| Model Number | 4J50 | Certification | ISO CE |
| Place of Origin | China | ||
| High Light | FeNi Low Expansion Alloys ，Bright Sealing Low Expansion Alloys ，FeNi50 Low Expansion Alloys | ||
(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.
| 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 |
| 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 |
| 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 |
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Trading Company
Year Established:
2008
Total Annual:
4000000-6000000
Employee Number:
20~50
Ecer Certification：
Verified Supplier
Ohmalloy Material Co.,Ltd is a high-tech enterprise which specialized in making all kinds of alloy such as high resistance alloy, low-resistance copper nickel alloy, precision alloy, FeCrAl alloy and thermocouple Alloy. Ohmalloy Material Co.,Ltd have a full production line from melting, surface... Ohmalloy Material Co.,Ltd is a high-tech enterprise which specialized in making all kinds of alloy such as high resistance alloy, low-resistance copper nickel alloy, precision alloy, FeCrAl alloy and thermocouple Alloy. Ohmalloy Material Co.,Ltd have a full production line from melting, surface...
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