Ohmalloy Material Co.,Ltd
| Payment Terms | L/C, T/T, , MoneyGram,Paypal |
| Supply Ability | 30 tons per month |
| Delivery Time | 5-8 working days after payment confirm |
| Packaging Details | Plywood case |
| Name | Expansion Precision Alloy 4J29 (Ni29Co18) UNS K94610 Electric Vacuum Kovar Strip Tube Bar Wire Plate |
| Material Shape | Bar/Strip/Plate/Tube(Customized) |
| Content | Ni29Co18 |
| Application | Matching and sealing with the hard glass/Electric Vacuum |
| State | Soft/ 1/2 Hard/ Hard(Customized) |
| Feature | low coeffficient of expansion |
| Brand Name | OHMALLOY/OEM |
| Model Number | SP-OHMALLOY-4J29 |
| Certification | Rohs/CE/SGS |
| Place of Origin | China |
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Product Specification
| Payment Terms | L/C, T/T, , MoneyGram,Paypal | Supply Ability | 30 tons per month |
| Delivery Time | 5-8 working days after payment confirm | Packaging Details | Plywood case |
| Name | Expansion Precision Alloy 4J29 (Ni29Co18) UNS K94610 Electric Vacuum Kovar Strip Tube Bar Wire Plate | Material Shape | Bar/Strip/Plate/Tube(Customized) |
| Content | Ni29Co18 | Application | Matching and sealing with the hard glass/Electric Vacuum |
| State | Soft/ 1/2 Hard/ Hard(Customized) | Feature | low coeffficient of expansion |
| Brand Name | OHMALLOY/OEM | Model Number | SP-OHMALLOY-4J29 |
| Certification | Rohs/CE/SGS | Place of Origin | China |
| High Light | nickel iron alloy ，low expansion alloys | ||
Expansion Precision Alloy 4J29 (Ni29Co18) UNS K94610 Electric Vacuum Kovar Strip Tube Bar Wire Plate
OhmAlloy-4J29 (Expansion alloy)
(Common Name: Kovar, Nilo K, KV-1, Dilver Po, Vacon 12)
OhmAlloy-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.
Chemical Composition
| Grade | C% | P% | S% | Mn% | Si% | Cu% | Cr% | Mo% | Ni% | Co% | Fe% |
| Kovar | Max 0.03 | Max 0.020 | Max 0.020 | Max 0.50 | Max 0.30 | Max 0.20 | Max 0.20 | Max 0.20 | 28.5-29.5 | 16.8-17.8 | Bal. |
Specifications
| Grade | UNS | Werkstoff Nr. |
| Kovar | K94610 | 1.3981 |
Physical Properties
| Grade | Density | Melting Point |
| Kovar | 8.17 g/cm3 | 1449°C |
Mechanical Properties
| Grade | Tensile Strength N/mm² | ||||
| Soft | 1/4 Hard | 1/2 Hard | 3/4 Hard | Full Hard | |
| Kovar Strip | <570 | 520-630 | 590-700 | 600-770 | >700 |
| Kovar Wire | <585 | 585-725 | 655-795 | 725-860 | >860 |
Coefficient of Expansion
| Alloy | Linear Coefficient of Thermal Expansion a,10-6/°C | |||||||
| 20-200°C | 20-300°C | 20-400°C | 20-450°C | 20-500°C | 20-600°C | 20-700°C | 20-800°C | |
| Kovar | 5.9 | 5.3 | 5.1 | 5.3 | 6.2 | 7.8 | 9.2 | 10.2 |
Package
Company Details
Business Type:
Manufacturer,Distributor/Wholesaler,Exporter,Trading Company
Year Established:
2008
Total Annual:
4000000-6000000
Employee Number:
20~50
Ecer Certification：
Verified Supplier
Ohmalloy Material Co.,Ltd is a high-tech enterprise which specialized in making all kinds of alloy such as high resistance alloy, low-resistance copper nickel alloy, precision alloy, FeCrAl alloy and thermocouple Alloy. Ohmalloy Material Co.,Ltd have a full production line from melting, surface... Ohmalloy Material Co.,Ltd is a high-tech enterprise which specialized in making all kinds of alloy such as high resistance alloy, low-resistance copper nickel alloy, precision alloy, FeCrAl alloy and thermocouple Alloy. Ohmalloy Material Co.,Ltd have a full production line from melting, surface...
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