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Glass Sealing Precision Alloys Kovar Alloy 4J29 With Ceramic Wire / Rod / Strip
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Brand Name:OHMALLOY
Model Number:4J29
Certification:SGS, ISO
Price:negotiable
Payment Terms:L/C, D/A, D/P, T/T,
Supply Ability:25000 KG per month
Delivery Time:25-35 working days
Company Data
Verified Supplier
Contact Person
Qiu
Business Type:
Manufacturer Distributor/Wholesaler Exporter Trading Company
Officials:
Room 311, No.1211, Mudanjiang Road, Baoshan district, Shanghai
Quality:
Quality Certifitation Available
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Product Details
Company Profile
Product Details
Sealing Ceramic Vacuum Switch Fe Ni Co Alloy Ceramic - To - Metal
Ohmalloy-4J33 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.
Normal composition%
| 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 |
Typical Physical properties
| 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 |
| 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 |
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 |
Typical Mechanical properties
| Tensile Strength | Elongation |
| Mpa | % |
| 539 | 32 |
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 | |
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 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.
Company Profile
Ohmalloy Material Co.,Ltd
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 cleaning, rolling and slitting, full set of testing machine and can meet all kinds of technical requirement from customer. Our product is widely used in heating equipment, big steel mill, mineral, electrical equipment, food machinery, auto industry, aerospace industry. Our product not only is popular in domestic market, but also been exported to all over the world.
Our company aims to be the best-quality alloy producer in the
world. We insist on developing the more advanced alloy strip
technology, to serve all the customer, improve people’s living
level, make a more green earth in the future
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