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Home Products Precision Alloys

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

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FeCrAl Alloy (161)

Nickel Strip (40)

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I search for Nichrome plate long time, and successfully bought it from Ohmalloy material. OHMALLOY provide real good service in alloy service and can always help me in finding the correct resistance alloy.

—— Mike Harness

OHMALLOY can provie me only 1kg Kovar alloy wire 1.0mm with short time, that is really amazing. Thanks

—— Janey

Really professional in thermocouple wire and cable, what i want just can get from OHMALLOY

—— Chris

Enamelled Constantan 0.08mm, i never expect to get only 2kg of it. But OHMALLOY supply it to me with good quality. God Jesus! Such a reliable supplier from china

—— Aaron

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

Large Image : Top Quality Ready Stock of Kovar Tube / Pipe 4J29 / 29HK Tube Get Best Price

Product Details:

Place of Origin:	China
Brand Name:	OHMALLOY
Certification:	ISO
Model Number:	Ohmalloy-Kovar

Payment & Shipping Terms:

Minimum Order Quantity:	1kg
Price:	50~200USD/KG
Packaging Details:	Wooden-Case
Payment Terms:	T/T, L/C,

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Detailed Product Description

Material:	Kovar	Type Of Material:	Precision Alloy
OD:	0.2mm~100mm	ID:	0.015mm～10mm
Type Of Tube:	Seamless
Highlight:	nickel iron alloy , fe ni alloy

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