Iron-Nickel-Cobalt sealings alloy Kovar
Description
Kovar Alloy
  is a vacuum melted, iron-nickelcobalt,Â
low expansion alloy whose chemical composition is controlled within narrow limits to assure precise uniform thermal expansion properties. ExtensiveÂ
quality controls are employed in the manufacture of this alloy to ensure uniform sical and mechanical
 properties for ease in deep drawing, coining, stamping and machining.
Parameter
Chemical Composition
C | P | S | Mn | Si | Cr | Mo | Ni | Co | Fe |
0.03Max | 0.020Max | 0.020Max | 0.50Max | 0.30Max | 0.20Max | 0.20Max | 28.5-29.5 | 16.8-17.8 | Bal. |
Notes:
1.The shape and dimensions of the alloys are in compliance with ASTM F30
2. Content of cu 0.20(Max)
sical Property
Density(g/cm3 | 8.36 |
Cure Temperature,°C | 435 |
Resistivity (microhm-mm) | 490 |
Thermal Conductivity W/m-K | 17.3 |
Coefficient of pansion (average coefficient of pansion)
Heat Treatment of the Sample | 20-400ºC | 20-450ºC |
Heat to temperature of 900±20â in the hydrogen,hold for 1h;re-heat to 1100±20â, hold for 15 min.;cooled to 200â at a rate less than 5â/min | 4.6-5.2 | 5.1-5.5 |
Important NoticeChemical composition,sical and Mechanical Properties will be engineered according to specific customer requirements.Therefore chemical composition,sical and Mechanical Properties might be different to values listed in this document. Information about product characteristics or applicability of materials are shown only for informative purposes.
Sample PolicyThe samples are big enough (typically about 200mm in length for strip or plate) to get an understanding of the material characteristics, meanwhile custom-made sample available !    If you still have questions about the material , do not hesitate to Paul with any specific questions.