1. What is the main composition of this alloy?
Answer: The alloy primarily consists of Nickel (Ni) 29%, Cobalt (Co) 18%, with the rest being Iron and trace elements. This composition gives Kovar 4J29 its excellent thermal expansion compatibility with glass and ceramics.
2. What are the typical applications of Kovar 4J29 alloy bars?
Answer: Kovar 4J29 is widely used in electronics and precision engineering, such as in vacuum tubes, glass-to-metal seals, electronic connectors, and other devices that require controlled thermal expansion.
3. Why is the surface of the rod described as "bright"?
Answer: The bright surface indicates that the rod has been polished or treated to remove oxidation and surface defects. This improves aesthetic quality and ensures better performance in welding or sealing processes.
4. What makes this alloy "expandable" or have controlled expansion properties?
Answer: Kovar 4J29 has a coefficient of thermal expansion (CTE) that closely matches that of borosilicate glass. This controlled expansion prevents cracking or stress when used in metal-to-glass joints or similar assemblies.
5. How should this alloy bar be stored and handled to maintain quality?
Answer: The alloy should be stored in a dry, clean environment to avoid oxidation. Handling should avoid surface scratches or contamination, as these can affect welding, sealing, and overall performance.
