Shanghai Tankii Alloy Material Co.,Ltd
Shanghai Tankii Alloy Material Co.,Ltd First Quality, Sincere Service
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Kovar Alloy - Strip of Sealing Alloy 4J29 for Integrated Circuit Framework
Application: Vacuum device main seal structure material
Feature: At 20 to 450 degrees and having a linear expansion coefficient similar borosilicate hard glass, high Curie point, has good low temperature stability of the organization. Suitable for use in mercury discharge instrument. Rectangular hysteresis loop.
Specifications
| Grade | 4J29- Strip |
| Thickness | 0.01~5mm |
| Width | 4~250mm |
| Weight of coil | 2-50 kgs |
| Condition | Soft/ Hard; Bright/ Oxidized |
Chemical composition(%)
| Grade | C | Si | Mn | P | S | Ni | Cu | Cr | Mo | Co | Fe |
| 4J29 | ≤0.03 | ≤ 0.3 | ≤ 0.5 | ≤0.02 | ≤0.02 | 28.5~29.5 | ≤ 0.2 | ≤0.2 | ≤0.2 | 16.8~17.8 | Bal. |
Physical properties
Mechanical properties
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| Yield Strength (Mpa) | Tensile Strength (Mpa) | Elongation, % | Hardness, HV |
| 4J29 | Cold-rolling | 695 | 780 | 5 | 230 |
| As annealed | 315 | 520 | 24 | 148 |