Suzhou Xunshi New Material Co., Ltd
| Payment Terms | T/T |
| Supply Ability | 1000kg per week |
| Delivery Time | 3-5 weeks |
| Packaging Details | Wooden case |
| Material | Fe-Ni-Co |
| Forms | Strip, bar, wire, pipe |
| Equal grades | 4J29(China), ASTM F-15, NILO K, Pernifer 2918, Rodar, Dilvar P1, UNS K94610, 29-17 alloy |
| Size range | 20~300mm |
| Density | 8.36g/cm3 |
| Tc | 430°C |
| Brand Name | XUNSHI |
| Model Number | Kovar |
| Certification | ISO9001:2015 |
| Place of Origin | China |
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Product Specification
| Payment Terms | T/T | Supply Ability | 1000kg per week |
| Delivery Time | 3-5 weeks | Packaging Details | Wooden case |
| Material | Fe-Ni-Co | Forms | Strip, bar, wire, pipe |
| Equal grades | 4J29(China), ASTM F-15, NILO K, Pernifer 2918, Rodar, Dilvar P1, UNS K94610, 29-17 alloy | Size range | 20~300mm |
| Density | 8.36g/cm3 | Tc | 430°C |
| Brand Name | XUNSHI | Model Number | Kovar |
| Certification | ISO9001:2015 | Place of Origin | China |
| High Light | iron nickel alloy ，corrosion resistant alloys | ||
Kovar Controlled Expansion Alloy Hot Forged Round Bar for Glass Sealing Application
A-ONE ALLOY keeps in stock Kovar hot fogerd round bar from diameter 20mm to diameter 300mm. And we could make fast delivery for customized sizes as well as forged pieces.
Kovar controlled expansion alloy, most likely know as 4J29 in China, is a Nickel Iron alloy with 29% Nickel, 17% Cobalt and the remaining balance is Iron.
Kovar controlled expansion alloy, 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 area.
Kovar has thermal expansion similar to glass. Meanwhile its nonlinear thermal expansion curve can often be made to match a glass. This makes it the most popular controlled expansion alloy so far.
Chemical compostion of Kovar
| Alloy | % | Ni | Cr | Co | Cu | C | Mn | Si | P | S | Mo | Fe |
| Kovar | Min | 28.5 | 16.8 | Rem | ||||||||
| Max | 29.5 | 0.2 | 17.8 | 0.20 | 0.03 | 0.50 | 0.30 | 0.02 | 0.02 | 0.20 |
The average linear expansion coefficient(10-6C)
| 20~100°C | 20~300°C | 20~400°C | 20~450°C | 20~500°C | 20~530°C | 20~600°C |
| — | — | 4.6~5.2 | 5.1~5.5 | — | — | — |
Applications of Kovar
Forms available at A-ONE ALLOY
Company Details
Business Type:
Manufacturer
Year Established:
2015
Total Annual:
1000-1200
Employee Number:
100~120
Ecer Certification：
Verified Supplier
Suzhou Xunshi New Material Co., Ltd (refered as Xunshi afterwards) is a professional supplier of high performance alloys. Our factory is specialized in manufacturing Nickel alloys & Cobalt alloys for 10+ years，with a company mission to provide a high quality, reliable source for precision... Suzhou Xunshi New Material Co., Ltd (refered as Xunshi afterwards) is a professional supplier of high performance alloys. Our factory is specialized in manufacturing Nickel alloys & Cobalt alloys for 10+ years，with a company mission to provide a high quality, reliable source for precision...
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