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FeNiCo Controlled Expansion Alloys 4J29 For Vacuum Electronic Devices Glass Sealing
| Place of Origin | China |
|---|---|
| Brand Name | XUNSHI |
| Model Number | 4J29 |
| Minimum Order Quantity | 50 kg |
| Price | Negotiable |
| Packaging Details | Plywood case |
| Delivery Time | 30-35 days |
| Payment Terms | T/T |
| Supply Ability | 5000kg per week |
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xProduct Details
| Certification | ISO9001 | Equal Grades | 4J29, Kovar, Nilo K |
|---|---|---|---|
| Forms Of Supply | WIre, Strip, Bar, Forging, Plate | Density | 8.36g/cm3 |
| Model | 4J29 | Product Name | Controlled Expansion Alloys |
| High Light | thermal expansion nickel,corrosion resistant alloys |
||
Product Description
FeNiCo Controlled Expansion Alloys 4J29 For Vacuum Electronic Devices Glass Sealing
4J29 is an equal grade of Kovar controlled expansion alloy in China. It has a high Curie point and good low temperature tissue stability
Chemical compistion of 4J29
| Element | C | Mn | Si | P | S | Cu | Cr | Mo | Ni | Co | Fe |
| Weight(%) | 0.03 max | 0.5 max | 0.30 max | 0.020 max | 0.020 max | 0.20 max | 0.20 max | 0.20 max | 28.5~29.5 | 16.8~17.8 | Bal |
Features
- High Curie point
- Good low-temperature stability
- Tense oxide film, and can be well wetted by the glass
- No reaction with mercury
- Good corrosion resistance in air, fresh water and sea water
Applications
Kovar is widely used in applications such as power tubes, microwave tubes, transistors, diodes, hybrid packages, and other kinds of scientific instruments.
- Sealing alloys for hard glasses
- Transmitting tube
- Oscillation tube
- Ignitron
- Transistor
- Relay shell
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