| All data is for information only------(<---links) | |
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| PRODUCT DATA of Kovar |
| Material | Kovar |
| Product Datasheet | kovar DS |
| General Information | The thermal expansion characteristics match those of the borosilcate glasses, and alumina type ceramics. It is produced to a close chemistry range, yielding repeatable properties which make it a choice for electronic glass-to-metal sealed enclosures whre reliability is of importance. |
| Processing and Assembly | The alloy is normally used in the annealed condition |
| Precautions | The inflexion point is 440C |
| Product Type | Mtale alloy as wire and strip |
| Chemical Composition | Fe-29Ni-17Co |
| EXPERIENCE IN PRACTICE |
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| Development Status | Commercial Product |
| Equivalent Designations | Nilo K, UNS K94610, Fe-N29K17, Dilver P1 |
| PHYSICAL PROPERTIES |
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| Specific Gravity | 8.16 |
| Magnetic Properties | Ferromagnetic |
| Curie Temperature | 435 °C |
| ELASTIC PROPERTIES |
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| Tensile Modulus | 130 GPa |
| Poisson Ratio | 0.3 |
| ELECTRICAL PROPERTIES |
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| Electrical Volume Resistivity | 4.3e-7 ohm.m |
| THERMAL PROPERTIES |
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| Thermal Conductivity | 16.7 W/m.K |
| Thermal Expansion Coefficient | 6.2 μstrain/°C |
| Melting Range | 1450 °C |
| RELEVANT PROPERTIES FOR USE IN SPACE COMMUNITY |
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| Stress Corrosion Status | Low Resistance to SCC: Table 3
Remark: Not for primary structural items Remark: Requires Stress corrosion evaluation form Remark: acc. to ECSS-Q-ST-70-36C Data Quality: Design Data |
| EMF vs SCE | -0.3 V Remark:measured in 3.5% NaCl solution Data Quality: Design Data |