JINXING MATECH CO LTD
| Payment Terms | L/C, T/T |
| Supply Ability | 3000T |
| Delivery Time | 35days |
| Packaging Details | Standard wooden case |
| Product Type | 4j29 Fe-Ni-Co Glass Sealing Alloy Wire Kovar Alloy Wire |
| Material | Feni Alloy |
| Carbon Content | low |
| Transport Package | wooden case |
| Shape | round bar |
| Condition | soft |
| Surface | Bright |
| Origin | China |
| Brand Name | JX |
| Model Number | 4j29 |
| Certification | ISO |
| Place of Origin | china |
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Product Specification
| Payment Terms | L/C, T/T | Supply Ability | 3000T |
| Delivery Time | 35days | Packaging Details | Standard wooden case |
| Product Type | 4j29 Fe-Ni-Co Glass Sealing Alloy Wire Kovar Alloy Wire | Material | Feni Alloy |
| Carbon Content | low | Transport Package | wooden case |
| Shape | round bar | Condition | soft |
| Surface | Bright | Origin | China |
| Brand Name | JX | Model Number | 4j29 |
| Certification | ISO | Place of Origin | china |
| High Light | Glass Sealing Alloy Wire ，Kovar Alloy Wire ，4j29 Alloy Wire Fe-Ni-Co | ||
Kovar Alloy Wire is a iron-nickel-cobalt, low expansion alloy whose chemical composition is controlled within narrow limits to assure precise uniform thermal expansion properties. Kovar alloy has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials.
4J29 (Expansion alloy)
(Common Name: Kovar, Nilo K, KV-1, Dilver Po, Vacon 12)4J29 also known as Kovar alloy. it was invented to meet the need for a reliable glass-to-metal seal, which is required in electronic devices such as light bulbs, vacuum tubes, cathode ray tubes, and in vacuum systems in chemistry and other scientific research. Most metals cannot seal to glass because their coefficient of thermal expansion is not the same as glass, so as the joint cools after fabrication the stresses due to the differential expansion rates of the glass and metal cause the joint to crack.
Kovar Alloy Wire Mainly used in electric vacuum components and emission control, shock tube, igniting tube, glass magnetron, transistors, seal plug, relay, integrated circuits lead, chassis, brackets and other housing sealing.
Kovar Alloy Wire Normal composition%
| Ni | 28.5~29.5 | Fe | Bal. | Co | 16.8~17.8 | Si | ≤0.3 |
| Mo | ≤0.2 | Cu | ≤0.2 | Cr | ≤0.2 | Mn | ≤0.5 |
| C | ≤0.03 | P | ≤0.02 | S | ≤0.02 |
| Code of condition | Condition | Wire | Strip |
| R | Soft | ≤585 | ≤570 |
| 1/4I | 1/4 Hard | 585~725 | 520~630 |
| 1/2I | 1/2 Hard | 655~795 | 590~700 |
| 3/4I | 3/4 Hard | 725~860 | 600~770 |
| I | Hard | ≥850 | ≥700 |
| Density (g/cm3) | 8.2 |
| Electrical resistivity at 20ºC(Om*mm2/m) | 0.48 |
| Temperature factor of resistivity(20ºC~100ºC)X10-5/ºC | 3.7~3.9 |
| Curie point Tc/ ºC | 430 |
| Elastic Modulus, E/ Gpa | 138 |
Kovar Alloy Wire picture:
4J29 not only has thermal expansion similar to glass, but its nonlinear thermal expansion curve can often be made to match a glass, thus allowing the joint to tolerate a wide temperature range. Chemically, it bonds to glass via the intermediate oxide layer of nickel oxide and cobalt oxide; the proportion of iron oxide is low due to its reduction with cobalt. The bond strength is highly dependent on the oxide layer thickness and character. The presence of cobalt makes the oxide layer easier to melt and dissolve in the molten glass. A grey, grey-blue or grey-brown color indicates a good seal. A metallic color indicates lack of oxide, while black color indicates overly oxidized metal, in both cases leading to a weak joint.
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Importer,Exporter,Seller,Other
Year Established:
2007
Total Annual:
5,000,000-10,000,000
Employee Number:
10~25
Ecer Certification：
Site Member
JINXING MATECH is a research and development, production, processing and sales of integrated, comprehensive refractory metal, precious metal material manufacturer.JINXING MATECH is an expert provider on the metal solution. Especially on the products such as Tungsten , Tungsten copper , Titanium ... JINXING MATECH is a research and development, production, processing and sales of integrated, comprehensive refractory metal, precious metal material manufacturer.JINXING MATECH is an expert provider on the metal solution. Especially on the products such as Tungsten , Tungsten copper , Titanium ...
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