Model No.: 4J29、W.Nr.1.3981、FeNi29Co17、UNS K94610
Brand: jinagsu nickel alloy
Place Of Origin: China
Species: Nickel Plate
Whether Powder: Not Powder
Packaging: standard export packing, plastic film inside, wooden pallets outside , choose the suitable packing
Transportation: Ocean,Land,Air,Express
Place of Origin: China
Supply Ability: 20 metric tons per month
Port: shanghai
Payment Type: L/C,T/T,D/P,D/A,Paypal
Incoterm: FOB,CIF,EXW,FCA
4J29 Kovar 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 vital role in the high-tech industry, especially in the electric vacuum industry, aerospace, electronic packaging and other fields plays an important role. Its preparation includes melting, casting, heat treatment, etc. The processing needs appropriate parameters, and the heat treatment can optimize the performance.
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 |
Performance Feature
- Low coefficient of thermal expansion: In the temperature range of 20 ~ 450 ° C, the linear expansion coefficient of 4J29 alloy is similar to that of borosilicate hard glass, which makes it an ideal sealing material in the electric vacuum industry.
- Good machining performance: the alloy can be processed by forging, rolling, drawing and other ways, and the surface quality after processing is easy to control.
- 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 requirements of various complex working conditions.
- Good thermal stability: The alloy maintains stable performance over a wide temperature range and is suitable for a variety of high and low temperature environments.
Physical & Mechanical Property
| Density | Melting | Tensile strength | Yield strength | Elongation | Hardness |
| 8.30g/cm³ | 1450°C | 500MPa | 325MPa | 20% | 150 |
Application Area
- Electric vacuum industry: In the manufacture of electric vacuum components such as emission tube, oscillation tube, ignition tube, magnetron, transistor, etc., 4J29 alloy as the main sealing structural material, and hard glass to achieve tight sealing, to ensure the tightness and reliability of components.
- Aerospace field: Due to its excellent mechanical properties and stable dimensional changes, 4J29 alloy is widely used in the aerospace field, such as for the manufacture of satellite structures, rocket engines and other high-temperature components.
- In the field of electronic packaging: In the packaging of electronic devices such as integrated circuits and tubes, 4J29 alloy can provide stable size and performance, and protect electronic components from thermal stress.
- In the field of medical devices: In the manufacture of medical devices such as artificial heart valves and prosthetics, 4J29 alloy is favored for its good biocompatibility and mechanical properties.
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