Offer Kover -- 4J29 By Xi'an Gangyan Special Alloy Co., Ltd, China

Offer Kover -- 4J29

Localit�:

China

Prix de commande minimale:

Commande minimale:

0.05 Ton

Packaging Detail:

Export wooden case

Delivery Time:

Within 4 weeks

Supplying Ability:

Payment Type:

L/C, T/T

Description

Glass sealed and controllled expansion alloys
*kovar alloy,ASTM F*5, Nilo-K,UNS K****0 (FeNi*9Co*7),Chinese 4J*9
*Specifications?ASTM F*5; DIN ****5; S.E.W. **5; Werkstoff Nr. 1.***1; AFNOR NF A*****1

Note:
A Nickel-Iron-Cobalt, controlled expansion alloy containing *9% Nickel. It?s coefficient of expansion (which decreases with rising temperature to the inflection point), matches the expansion rate of borosilicate glasses and aluminia ceramics. Applications include glass to metal seals in applications requiring high reliability or resistance to thermal shock, ie. high-power transmitting valves, transistor leads and heaters and photography flash bulbs.

Similar Grades:

Russia	U.S.A.	U.K.	Japan	France	Germany
*9??	Kovar	Nilo K	KV*1	Dilver P0	Vacon *2
*9??-??	Rodar Techallony Glasseal ****7	Teleaseal	KV2 KV3	Dilver P1	Silvar *8

Grade & Chemical Composition (see Table 1)
Table 1 Grade & Chemical Composition

Grade	Chemical Composition (%)
	C	P	S	Mn	Si	Cu	Cr	Mo	Ni	Co	Fe
	?								Ni	Co	Fe
4J*9	0.*3	0.**0	0.**0	0.5	0.*0	0.*0	0.*0	0.*0	8.5?9.5	6.8?7.8	Balance
4J*4	0.*3	0.**0	0.**0	0.5	0.*0	0.*0	0.*0	0.*0	4.2?5.2	8.0?9.0	Balance

Notes:

1. The content of Al?Mg?Zr and Ti should be no more than 0.*0%?the total content should be no more than 0.*0%. Otherwise, the supplier?s PO and/or contract shall indicate clearly.
2. Under condition that the average coefficient of the linear expansion meets the requirements of the standard, the content of nickel and cobalt are allowed to deviate from the stated range.
3.The shape and dimensions of the alloys are in compliance with GB/T****5.

Mechanical Property (see Table *-Table 4)
Table 2 Tensile Strength of Wire

Symbol	Status	Tensile Strength/MPa
R	Annealed	2.5	?**0
?2.5	?**5

Physical Property (see Table 5 & Table 6)
Table 5 Coefficient of Linear Expansion

Grade	Heat Treatment of the Samples	Average Coefficient of Linear Expansion
Grade	Heat Treatment of the Samples	0?*0?	0?*0?	0?*0?C
4J*9	Heat to temperature of *0?0? in the hydrogen, hold for 1h; re-heat to **0?0?, hold for 5 min.; cooled to *0? at a rate less than 5?/min	?	4.6?5.2	5.1?5.5?
4J*4		4.3?5.1	4.6?5.2	?

?Upper limit is 5.6 for transistors.

?????????????????????????????????????????????????????????????? Table 6 Typical Coefficient of Linear Expansion

?

Grade	Average Coefficient of Linear Expansion
Grade	0?*0?	0?*0?	0?*0?	0?*0?	0?*0?	0?*0?	0?*0?	0?*0?
4J*9	5.9	5.3	5.1	5.3	6.2	7.8	9.2	*0.2
4J*4	4.9	4.6	4.9	5.9	6.8	8.7	?	?

Note: The values in the table are for reference only.
?

Usage: It is applied to hard glass-to-metal seals.

Applications

Kovar alloy 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 intergrated circuits, it has been used for the flat pack and the dual-in-line package.

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Offer Kover -- 4J29

Xi'an Gangyan Special Alloy Co., Ltd

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Offer Kover -- 4J29

Xi'an Gangyan Special Alloy Co., Ltd

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