Huona (Shanghai) New Material Co., Ltd.
| Resisivity（μΩ·m） | 0.49 μΩ·m |
| Delivery Time | 7-20days |
| Tensile strength(N/m㎡） | 490-690mpa |
| Payment Terms | T/T |
| Hardness（Hv) | 140-220Hv |
| Density（g/m³） | 8.17 |
| Max continuous Operating Temperature（℃） | 450℃ |
| Melting point（℃） | 1450℃ |
| Thermal Conductivity (W/m·K, 20°C) | 17.3 |
| Packaging Details | Spool + Carton + Wooden Case |
| Supply Ability | 100 Tons per year |
| Elongation（%) | ≥20% |
| Model Number | 4J29 |
| Certification | ISO9001, SGS, and so on |
| Brand Name | Huona |
| Place of Origin | Shanghai |
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Product Specification
| Resisivity（μΩ·m） | 0.49 μΩ·m | Delivery Time | 7-20days |
| Tensile strength(N/m㎡） | 490-690mpa | Payment Terms | T/T |
| Hardness（Hv) | 140-220Hv | Density（g/m³） | 8.17 |
| Max continuous Operating Temperature（℃） | 450℃ | Melting point（℃） | 1450℃ |
| Thermal Conductivity (W/m·K, 20°C) | 17.3 | Packaging Details | Spool + Carton + Wooden Case |
| Supply Ability | 100 Tons per year | Elongation（%) | ≥20% |
| Model Number | 4J29 | Certification | ISO9001, SGS, and so on |
| Brand Name | Huona | Place of Origin | Shanghai |
| High Light | 4J29 Kovar alloy Fe-Ni-Co controlled expansion alloy 29HK ASTM F15 ，low thermal expansion matching thermal expansion coefficient glass-to-metal hermetic sealing ，stable microstructure compact oxide film mercury resistant | ||
4J29 Alloy Wire (Kovar Wire) is a precision iron-nickel-cobalt low-expansion sealing alloy designed for glass-to-metal sealing applications. It offers excellent thermal expansion compatibility, good mechanical strength, and reliable hermetic sealing performance. Its coefficient of thermal expansion closely matches that of hard glass and borosilicate glass over a specified temperature range, making it an ideal material for Glass-to-Metal Seals (GTMS).
The alloy wire features excellent cold workability, weldability, dimensional stability, and consistent surface quality. Manufactured under strict chemical composition control and optimized heat treatment processes, 4J29 wire provides stable microstructure, reliable performance, and high production consistency.
4J29 alloy wire is widely used in aerospace, military, electronics packaging, vacuum devices, relays, sensors, RF connectors, integrated circuit packages, power feedthroughs, cable sealing assemblies, and other hermetically sealed electrical and electronic components requiring long-term reliability.
Various wire diameters, coil or straight wire forms are available. Customized dimensions, tolerances, surface finishes, and packaging can also be provided according to specific customer requirements.
1. Chemical Composition:
|
Ni |
28.5-29.5 |
|
C |
≤0.03 |
|
Fe |
Bal |
|
Co |
16.8-17.8 |
2. Technical Specifications:
|
Parameter |
Specification |
|
Max continuous Operating Temperature(℃) |
450℃ |
|
Resisivity(μΩ·m) |
0.49 μΩ·m |
|
Density(g/m³) |
8.17 |
|
Thermal Conductivity (W/m·K, 20°C) |
17.3 |
|
Tensile strength(N/m㎡) |
490-690mpa |
|
Melting point(℃) |
1450℃ |
|
Hardness(Hv) |
140-220Hv |
|
Elongation(%) |
≥20% |
3. Production Attributes
|
Product Form |
4J29 wire |
|
Diameter |
customization |
|
Surface Finish |
Bright, Polished |
|
Packaging Type |
Coil, Bundle, Straight Rods |
|
Certification |
ISO9001, SGS, and so on |
|
Application Environment |
Chemical, Industrial,Home |
4.Applications
5.Key features
Company Details
Business Type:
Manufacturer,Exporter
Year Established:
2008
Total Annual:
8000000-100000000
Employee Number:
100~120
Ecer Certification：
Verified Supplier
Huona (Shanghai) New Material Co., Ltd. Was established in 2008, currently have three divisions: Magnesium Division, Thermal Spray Division and Functional Material Division.Magnesium Division produces magnesium metal products. Various models of high-quality magnesium alloy plate, magnesium rods, hig... Huona (Shanghai) New Material Co., Ltd. Was established in 2008, currently have three divisions: Magnesium Division, Thermal Spray Division and Functional Material Division.Magnesium Division produces magnesium metal products. Various models of high-quality magnesium alloy plate, magnesium rods, hig...
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