Specifications

4J29 Kovar Expanding alloy bar
1.Certification:ISO9001:2008
2.Fine after-sale service
3.High quality
4.samples available

4J29 Kovar Expanding alloy bar

 

Properties of Kovar

Kovar alloy is a vacuum melted, iron-nickel-cobalt alloy that is widely used in the electronics industry.suitable for sealing to hard glasses, in applications requiring high reliability or resistance to thermal shock, ie. high power transmitting valves.

Chemical Compositions:

C	Ni	Fe	Si	Mn	S	Co
Max0.02	Nom29.0	Balance	Max0.20	Max0.30	Max0.025	Nom17.0

 

Thermal Expansion Properties:

Temperature		Coefficient
77°F to	25°C to	10(-6)/°F	10(-6)/°C
212 392 572 662 752 842 932 1112 1292 1472 1652	100 200 300 350 400 450 500 600 700 800 900	3.25 2.89 2.85 2.72 2.81 2.92 3.41 4.34 5.06 5.73 6.25	5.86 5.20 5.13 4.89 5.06 5.25 6.15 7.80 9.12 10.31 11.26

 

Mechanical Properties in the Annealed Condition:

Yield Strength (0.1% Offset)		Tensile Strength		Elongation
psi	MPa	psi	MPa	(%)
49,000	340	75,000	520	42

 

Physical Properties:

DENSITY	8.16 g/cm3	0.295 lb/in3
MELTING POINT	1450oC	2640oF
INFLECTION POINT	450°C	840°F
THERMAL CONDUCTIVITY	16.7 W/m•°C	116 btu•in/ft2•h°F

 

Our company has been in this line over 10 years, we can supply good products and good services.

 

Win-Win is our company tenet!

 

Dont hesitate to contact me, we will give you a satisfactory reply! 

 

 

Certification:

 

 

Equipment:

 

 

Testing: