Overview
| brand | Bailian Special Steel | compressive strength | |
| granularity | Nickel content | 28.5%~29.5% | |
| Product characteristics | Kovar alloy | Product name | Nickel iron alloy |
| Grade | 4J29 | producing area | Changzhou City |
| Impurity content | 0.001% | Manufacturer or not | yes |
| Customized or not | can | ||
Product Details
4J29 alloy, also known as Kovar alloy. This alloy has a linear expansion coefficient similar to that of borosilicate hard glass at 20-450 ℃, a high Curie point, and good low-temperature structural stability. Kovar alloy is mainly used for making iron nickel cobalt alloy strips, bars, plates, and pipes that are matched and sealed with hard glass.
Combined number | Sample heat treatment system | Average linear expansion coefficient a, 10-6/℃ | ||
20-300 ℃ | 20-400 ℃ | 20-450 ℃ | ||
4J29 | Heat to 900 ± 20 ℃ in a hydrogen atmosphere, hold for 1 hour, then heat to 1100 ± 20 ℃, hold for 15 minutes, and cool to below 200 ℃ at a rate of no more than 5 ℃/min before being discharged from the furnace | ---- | 4.6 to 5.2 | 5.1 to 5.5* |
Suitable for electronic vacuum devices such as emission tubes, oscillation tubes, ignition tubes, transistors, and tube sealing plugs, relay housings, etc. It has a certain coefficient of linear expansion within the temperature range of 20 ℃ -450 ℃ and can be matched and firmly sealed with hard glass.
Business Scope: Sales of high-temperature alloys, Kovar special alloy materials, alloys, nickel chromium alloys, corrosion-resistant metal materials, and welding materials; Self operated and agent for various types of goods. (Projects that require approval according to law can only be operated with the approval of relevant departments)