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Product Details:
Payment & Shipping Terms:
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| Material: | Fe Ni Co Alloy | Condition: | Soft |
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| Wire Diameter Range: | 0.1mm ~ 9.0mm | Package: | Spool, Coil, Wooden Case |
| Surface: | Bright | Density: | 8.27 G/cm3 |
| Application: | Sealing Material For Ceramics | Annealing Treatment: | In Vacuum Furnace |
| Elongation: | More Than 25% | ||
| High Light: | nickel iron alloy,low expansion alloys |
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Expansion Fe Ni Co Alloy Wire Ni33Co17 For Sealing And Matching Ceramics
OhmAlloy-4J33 (Expansion alloy)
(Common Name: 33НК, 4J33, KV-4, Ni33Co17)
4J33 alloy has a close Linear expansion coefficient with 95% Al2O3 ceramic in the range of -60 to 600 degrees Celsius. it is an Important sealing structural material in the electric vacuum industry; Mainly used for matching and ceramic sealing.
Ohmalloy-4J33 for Sealing and matching ceramics
| Ni | 32.0~33.6 | Fe | Bal. | Co | 14.0~15.2 | Si | ≤0.3 |
| Mo | - | Cu | - | Cr | - | Mn | ≤0.5 |
| C | ≤0.05 | P | ≤0.02 | S | ≤0.02 |
| Density (g/cm3) | 8.27 |
| Electrical resistivity at 20℃(Ωmm2/m) | 0.46 |
| Thermal conductivity, λ/ W/(m*℃) | 17.6 |
| Curie point Tc/ ℃ | 440 |
| Elastic Modulus, E/ Gpa | 139 |
Coefficient of expansion
| θ/℃ | α1/10-6℃-1 | θ/℃ | α1/10-6℃-1 |
| 20~300 | 6.3 | 20~400 | 6.1 |
| 20~500 | 6.9 | 20~600 | 8.3 |
| Tensile Strength | Elongation |
| Mpa | % |
| 539 | 32 |
| The heat treatment process | |
| Stress relief annealing | Heating to 470~540℃. Keep 1~2h, cooling in the air |
| Annealing | Heating to 750~ 900℃ In the medium vacuum |
| Holding time, h | 15min. ~ 1 hour |
| cooling | In the air |
Style of supply
| Alloys Name | Type | Dimension | ||
| OhmAlloy-4J33 | Wire | D= 0.1~8 mm | ||
| OhmAlloy-4J33 | Strip | W= 5~250 mm | T= 0.1 mm | |
| OhmAlloy-4J33 | Foil | W= 10~100 mm | T= 0.01~0.1 mm | |
| OhmAlloy-4J33 | Bar | Dia= 8~100 mm | L= 50~1000 mm | |
1. What's the minimum quantity customer can order?
If we have your size in stock, we can provide any quantity you want.
If we do not have, for spool wire, we can produce 1 spool, about 2-3kg. For coil wire, 25kg.
2. How can you pay for small sample amount?
We have account, wire transfer for sample amount also ok.
3. 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.
4. 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.
5. 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.
6. 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.
Sales Manager:Michaeal Qiu.
What's App:+86 13795230939
Tel:+86-21-66796338 Mobile Phone: +86 13795230939
Contact Person: Mr. Qiu
Tel: +8613795230939
