4J29 Silver Alloy Casting Alloy Suit In Sealing Glass ISO 9001 / RoHS

Soft Kovar Alloy Wire 4J29 for Sealing Glass ISO 9001 / RoHS 

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

Chemical composition(%)

Physical properties

• Density (g/cm³): 8.17
• Elastic Modulus (MPa): 165*10³
• Mean Coefficient of Thermal Expansion (10^-6/℃): 5.0 (20~400℃); 5.2 (20~450℃)
• Curie point (℃): 430
• Electrical resistivity (μΩ*cm): 46 (20℃)
• Specific heat (J/kg*℃): 418
• Thermal conductivity ( W/m. ℃): 20.3

Mechanical properties

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