| Customization: | Available |
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| Product Type: | Tube/Pipe |
| Material: | Iron-Nickel-Cobalt Alloy |
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LORK is a alloy manufacturer with 20 years of manufacturing experience.
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.
| FeNi Glass Sealing Alloys | |
| Grade | 4J42,4J45,4J50,4J52,4J54 |
| Size | Strip:(0.03-0.1)mm*(180-250)mm (0.1-1.0)mm*(10-250)mm (1.0-3.0)mm*(100-250)mm Wire:0.1-6.0mm Bar:20-100mm(Hot forging) 2.0-20mm(Cold drawing) |
| Features | It has a certain linear expansion coefficient in a certain temperature rang |
| Application | Used as soft glass or ceraimc sealing material in the electric vacuum industry. |
4J50 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 | / | Bal. |
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 |
4J50 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 |
Q1: Do you accept the trial order ?
A1: Yes,if we have the exactly size in stock.we can delivery even 1 piece/meter .
Q2: Can I have free sample before making orders?
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