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| Place of Origin | CHINA |
| Brand Name | OEM/ODM |
| Certification | ISO |
| Model Number | NiFe |
0.03-3.0mm Alloy 4j50 Vacovit 500 Nilo51 Ns-1 As Glass Sealing Material
Alloy 4j50, Vacovit 500, Nilo51, Ns-1
4J50 the other common Name: 50H, N50, Vacovit 500, FeNi50, Nilo51, Ns-1
4J50 is mainly composed of iron, nickel elements. It is characterized with a fixed coefficient of expansion
| Grade | 4J42,4J45,4J50,4J52,4J54 | |
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| Features |
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| Application | Used as soft glass or ceraimc sealing material in the electric vacuum industry. |
Normal composition%
| Grade | C | P | S | Mn | Si | Al | Ni | Co | Fe |
| 4J42 | ≤0.05 | ≤0.02 | ≤0.02 | ≤0.8 | ≤0.3 | ≤0.1 | 41.5-42.5 | ≤1.0 | Bal. |
| 4J45 | ≤0.05 | ≤0.02 | ≤0.02 | ≤0.8 | ≤0.3 | ≤0.1 | 44.5-45.5 | / | Bal. |
| 4J50 | ≤0.05 | ≤0.02 | ≤0.02 | ≤0.8 | ≤0.3 | ≤0.1 | 49.5-50.5 | / | Bal. |
| 4J52 | ≤0.05 | ≤0.02 | ≤0.02 | ≤0.6 | ≤0.3 | / | 51.5-52.5 | / | Bal. |
| 4J54 | ≤0.05 | ≤0.02 | ≤0.02 | ≤0.6 | ≤0.3 | / | 53.5-54.5 |
4J50 Typical Physical properties
| Density (g/cm3) | 8.21 |
| Electrical resistivity at 20ºC(ohm.mm2/m) | 0.44 |
| Thermal conductivity, λ/ W/(m*ºC) | 16.7 |
| Curie point Tc/ ºC | 500 |
| Elastic Modulus, E/ Gpa | 158 |
4J50 Coefficient of expansion
| θ/ºC | α1/10-6ºC-1 | θ/ºC | α1/10-6ºC-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 |
The heat treatment process
| Annealing | Heated to 900 ±20ºC in a hydrogen atmosphere |
| Holding time, h | 1 hour |
| cooling | With speed not more than 5 ºC / min. cooling to below 200 ºC |
FAQ
1. What's the minimum quantity customer can order?
If we have your size in stock, we can provide any quantity you want.
If the size is not in stoct, our MOQ will be about 30kgs.
2. Customer do not have express account. How will us arrange the delivery for sample order?
Just need to provide your address information, we will check the express cost, you can arrange the express cost together with sample value.
3.What's our payment terms?
We can accept LC T/T payment terms, it also depending on delivery and total amount. Let's talk more in details after getting your detailed requirements.
4.Do you provide free samples?
If you want several meters and we have stock of your size, we can provide, customer need to bear the International express cost.
5.What's our working time?
We will give you reply through email/phone Online contact tool within 24 hours. No matter working day or holidays.
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