UNS K94610 Kovar Alloy Bar With Good Low Temperature Tissue Stability
UNS K94610 Kovar Alloy Bar With Good Low-Temperature Tissue Stability
Kova alloy bar is also called sealing alloy or constant expansion alloy. Alloys with relatively constant low or moderate expansion coefficients over the temperature range -70 to 500 ° C. It is close to the expansion coefficient of glass or ceramic and other sealing materials, so as to achieve the effect of matching the seal. The main types are Fe-Ni, Fe-Ni-Co, Fe-Ni-Cr alloys. There are also non-oxygen 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 Bar
| 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 Bar
- 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
Application of Kovar Alloy Bar
It is suitable for transmitting tube, oscillating tube, pilot tube, transistor, sealed plug, relay shell and other electric vacuum devices. It has a certain linear expansion coefficient in the temperature range of 20 ℃ - 450 ℃, and can match with hard glass to sea firmly.
Kovar Alloy Bar Picture:
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