China Special Bolts, Inc. 
                                                                  电话  +86-755-23202160
                                                                  邮箱-4 inquiry.bolts@shapedparts.com
You are here: Home » Products » Alloy Material » Precision Alloy » Kovar

Alloy Fasteners

Bolt
Nut
Studs
Washer
Other Fasteners

Alloy Material

Share to:

Kovar

Quantity:
Inquire Contact Us

Kovar / 4J29

Kovar is a nominal 29%Ni-17%Co-54%Fe alloy that is a well-known glass-sealing alloy suitable for sealing to hard glasses. Kovar has a nominal expansion coefficient of approximately 5 ppm/°C and inflection temperature of ~450 °C (840 °F).

Kovar (ASTM F15) has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials. This alloy has found wide application in power tubes, microwave tubes, transistors, and diodes. In integrated circuits, it has been used for the flat pack and the dual-in-line package. 


Kovar Chemical Composition:
Grade C% P% S% Mn% Si% Cu% Cr% Mo% Ni% Co% Fe%
Kovar Max 0.03 Max 0.020 Max 0.020 Max 0.50 Max 0.30 Max 0.20 Max 0.20 Max 0.20 28.5-29.5 16.8-17.8 Bal.

Kovar Physical Properties:
Grade Density Melting Point
Kovar 8.17 g/cm3 1449°C

Previous: 
Next: 

Alloy Fasteners

Bolt
Nut
Studs
Washer
Other Fasteners

Alloy Material

Hastelloy Alloys
Monel Alloys
Nickel Alloys
Inconel Alloys
Incoloy Alloy
Precipitation Hardening Steel
Anti-corrosion Alloy
Duplex Stainless Steel
Superalloy
Precision Alloy
Austenitic Stainless Steel
Special Welding Wire

Navigation

Home
About Us
News
Contact US

Contact Us

Tel: +86-755-23202160  
Fax: +86-755-23001761
Email: inquiry.bolts@shapedparts.com
Office Add:
The 6th Industrial Park, Gonghe, Shajing, Baoan, Shenzhen, Guangdong, China.
 

KEEP IN TOUCH

 
Copyright © China Special Bolts, Inc..