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| Categories | Precision Alloy |
|---|---|
| Brand Name: | Tankii |
| Model Number: | Kovar 4J29 |
| Certification: | ISO Rohs |
| Place of Origin: | China |
| MOQ: | 100Kg |
| Payment Terms: | T/T, L/C, D/P, Western Union, MoneyGram |
| Supply Ability: | 50000 per month |
| Delivery Time: | 15-25days |
| Packaging Details: | Standard export wooden box packing. |
| Application: | Industrial |
| Color: | Silver |
| Hardness: | HRC45-55 |
| Heat Treatment: | Annealing |
| MOQ: | 1 Ton |
| Material: | Precision Alloy |
| Packaging: | Wooden Case |
| Processing Technology: | Forging |
| Shape: | wire strip sheet rod bar tube |
| Size: | Customized |
| Surface Treatment: | Polishing |
| Tolerance: | High Precision |
| Company Info. |
| Shanghai Tankii Alloy Material Co.,Ltd |
| Verified Supplier |
| View Contact Details |
| Product List |

Kovar (Alloy K) is a nickel-iron-cobalt controlled-expansion alloy containing 29% nickel. Its coefficient of expansion, which decreases with rising temperature to the inflection point, matches the expansion rate of borosilicate glasses and alumina ceramics. Kovar (Alloy K) is used for glass-to-metal seals in applications requiring high reliability or resistance to thermal shock. Kovar (Alloy K) is used for high-power transmitting valves, transistor leads and headers, integrated-circuit lead frames, and photography flash bulbs.
| Kovar Chemical Composition (Basic Density 8.36) | |||||||||||||
| Weight % | Ni | Fe | Co | C | Mn | Si | Al | Cr | Mg | Zr | Ti | Cu | Mo |
| Alloy K Kovar | 29.0 | 53.0 | 17.0 | 0.04 max | 0.50 max | 0.20 | 0.10 max | 0.20 max | 0.10 max | 0.10 max | 0.10 max | 0.20 max | 0.20 max |
| Material | Condition | Yield Strength (0.1% Offset) | Tensile Strength | Elongation % | ||
| psi | MPa | psi | MPa | |||
| Alloy K Kovar | Annealed | 49,000 | 340 | 75,000 | 520 | 42 |
| Specifications UNS K94610 Werkstoff Nr 1.3981 DIN 17745 ASTM F 15 AMS 7726 Wire AMS 7727 Bars and Forgings AMS 7728 Sheet, Strip and Plate MIL-I-23011 class 1 AFNOR NF A54-301 S.E.W 385 DILVER P | Registered Names Kovar ® Nicoseal ® Nicosel ® Rodar ® Telcoseal ® Sealvar ® Alloy 29-17 ® Nilo K ® Dilver ® Pernifer 29-18 ® |
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