High Coefficient Kovar Alloy Rods Of Thermal Expansion UNS K94610
High Coefficient Of Thermal Expansion Kovar Alloy Rods UNS K94610
Kovar Alloy Rods is also called sealing alloy or constant expansion alloy. Alloy with relatively constant low or medium expansion coefficient in the temperature range of - 70 to 500 ℃. It is close to the expansion coefficient of sealed materials such as glass or ceramics, so as to achieve the effect of matching sealing. The main types are iron nickel, iron nickel cobalt, iron nickel chromium alloys. There are also oxygen free copper, tungsten, molybdenum and their alloys and composites. It is mainly used as sealing material in electronic industry and electric vacuum industry.
Chemical Composition of Kovar Alloy Rods
| Chemical Composition (Basic Density 8.36) | |
| Element | Content |
| NICKEL (Ni) | 29 |
| COBALT (Co) | 17 |
| MANGANESE(Mn) | 0.5 |
| SILICON (SI) | 0.2 |
| SULFUR (S) | 0.025 |
| CHROMIUM(Cr) | 0.2 |
| COPPER (Cu) | 0.2 |
| MOLYBDENUM (Mo) | 0.2 |
| ZIRCONIUM (Zr) | 0.1 |
| PHOSPHORUS (P) | 0.025 |
| CARBON (C) | 0.06 |
| IRON | BALANCE |
Product specifications of Kovar Alloy Rods
- Density: 0.302 lbs./in3
- Specific Gravity: 8.36 g/cc
- Curie Temperature: 435o C / 815o F
- Melting Point: 1450o C / 2640o F
- Specific Heat: 0.105 cal/gm/ o C at 0o C & 0.155 cal/gm/ o C at 430o C
- Thermal Conductivity: 17.3 W/m ⋅ K
- Electrical Resistivity: 49 microhm/cm
Kovar Alloy Rods Picture:
![]()
![]()
![]()
Application of Kovar Alloy Rods
It is used for glass sealing of electric vacuum components such as emission tube, oscillating tube, pilot tube, magnetron, transistor, sealing plug, relay, outgoing line of integrated circuit, chassis, shell, support, etc
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.