Kovar (shown in Blue)

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Kovar (shown in Blue)
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Properties of Copper
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Thermal Expansion of Copper
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Thermal expansion of Molybdenum
TE4.535 x 10-6 per deg C at 400 C
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Glass used with Kovar
Code 7070
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Comparison of Filler Materials

• Sn Ag Solder
• Shear Strength 2,700 psi
• Tensile Strength 5,800 psi
• Expansion 30 PPM/oC
• Liquidus 430 oF

• Georo
• Au - Ge Braze
• Shear Strength 26,825 psi
• Tensile Strength 26,835 psi
• Youngs Modulus 10.55 x 106 psi
• Expansion 13 PPM/oC
• Liquidus 673 oF

• Sn Cu - Ag Solder
• Shear Strength 5,874 psi
• Liquidus 423 oF

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Wesco Metals
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Window