Model No.: 4J29, UNS K94610, W.Nr.1.3981, FeNi29Co17
Brand: HDF
Place Of Origin: China
Species: Nickel Wire
Whether Powder: Not Powder
Packaging: Standard export packaging, wooden box packaging
Transportation: Ocean,Land,Air,Express
Place of Origin: China
Certificate: ISO9001
Port: SHANGHAI
Payment Type: L/C,T/T,Paypal
Incoterm: FOB
4J29 Invar alloy, also known as Kovar alloy or ASTM F15 alloy, is an iron-nickel-cobalt alloy with unique thermal expansion properties and excellent mechanical properties. It plays a crucial role in high-tech industries, especially in the fields of electro-vacuum industry, aerospace, and electronic packaging. Its preparation involves melting, casting, and heat treatment, and processing requires appropriate parameters. Heat treatment can optimize its performance.
FEATURE
1. Low coefficient of thermal expansion: Within the temperature range of 20 to 450°C, the linear expansion coefficient of 4J29 alloy is similar to that of silicon borate hard glass, making it an ideal sealing material in the electrical vacuum industry.
2. Good processing performance: This alloy can be processed through various methods such as forging, rolling, and drawing, and the surface quality after processing is easy to control.
3. Excellent mechanical properties: 4J29 alloy has a high tensile strength (518 MPa or 75 ksi) and yield strength (276 MPa or 40 ksi), which can meet the usage requirements under various complex working conditions.
4. Good thermal stability: This alloy maintains stable performance within a wide temperature range and is suitable for various high-temperature and low-temperature environments.
CHEMICAL COMPONENT
| Element | Ni | Co | Fe | Si | Mn | C | S | P |
| % | 28.5-29.5% | 16.8-17.8% | Bal | ≤0.30% | ≤0.50% | ≤0.05% | ≤0.02% | ≤0.02% |
PHYSICAL & MECHANICAL COMPONENT
| Density | Melting | Tensile strength | Yield strength | Elongation |
| 8.3 g/cm³ | 1450°C | 500 MPa | 325 MPa | 20% |
APPLICATION
1. Electric Vacuum Industry: In the manufacturing of electric vacuum components such as electron tubes, oscillators, igniters, magnetrons, and transistors, 4J29 alloy is used as the main sealing structural material, achieving a tight seal with hard glass to ensure the airtightness and reliability of the components.
2. Aerospace Field: Due to its excellent mechanical properties and stable size changes, 4J29 alloy is widely used in the aerospace field, such as for manufacturing high-temperature components like satellite structures and rocket engines.
3. Electronic Packaging Field: In the packaging of electronic devices such as integrated circuits and vacuum tubes, 4J29 alloy can provide stable dimensions and performance, protecting electronic components from thermal stress.
4. Medical Devices Field: In the manufacturing of medical devices such as artificial heart valves and prosthetics, 4J29 alloy is favored due to its good biocompatibility and mechanical properties.
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