Top Quality Ready Stock of Kovar Tube / Pipe 4J29 / 29HK Tube

Name: Top Quality Ready Stock of Kovar Tube / Pipe 4J29 / 29HK Tube
Brand: Ohmalloy Material Co.,Ltd

Price Negotiable

Price: 50~200USD/KG

MOQ: 1kg

Delivery Time: Negotiable

Brand: OHMALLOY

Product Description

Kovar(4J29) Alloy Material
Kovar/4J29/UNS K94610/W.Nr.1.3912
Kovar is a Nickel-Cobalt-Iron alloy that has compatible thermal expansion characteristics to Borosilicate Glass. This property allows Kovar to maintain a mechanical connection to the glass over a range of temperatures. Etched Kovar parts are commonly used for step lids, carriers, covers and electronic shims.
Kovar (4J29) Chemical components
	C	Si	Mn	P	S	Ni	Fe	Cu	Cr	Co	Mo
max	0.03	0.3	0.5	0.02	0.02	29.5	bal	0.2	0.2	17.8	0.2
min						28.5				16.8
Kovar (4J29)Mechanical property & Physical properties:
Yield Strength		Tensile Strength		Elongation		Hardness		Density		Melting point
(Mpa)		(Mpa)		(%)		(HRC)		Density		Melting point
344		517		30		78HB		8.36 g/cm3		1450 °C
Supply scope
O.D: 0.20~100mm Wall thickness: 0.05~10mm The tolerance we could meet: Out diameter: ±0.003mm Wall thickness: ±0.005mm
Coefficient of Thermal Expansion (Nominal):
°C		20-200	20-300	20-400	20-450	20-500	20-600	20-700	20-800
10-6 /°C		5.9	5.3	5.1	5.3	6.2	7.8	9.2	10.2

Kovar (4J29)Applied field:
1.Kovar alloy has been used for making hermetic seals with the harder Pyrex glasses and ceramic materials.
2.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