Kovar 4j29 Alloy Wire Rod Bar for Glass Sealing and Electronic Components

Product Description

ASTM F15 cobalt base alloy rod nickel alloy kovar material 4J29 bar price

Product Description

Kovar alloy is a vacuum melted, iron-nickel-cobalt, low expansion alloy whose chemical composition is controlled within narrow limits to assure precise uniform thermal expansion properties. Extensive quality controls are employed in the manufacture of this alloy to ensure uniform physical and mechanical properties for ease in deep drawing, stamping and machining.

 

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.
 

Element	Min	Max
Carbon	--	0.02
Nickel	--	29.0
Iron	Balance
Silicon	--	0.20
Manganese	--	0.30
Cobalt	--	17.0

 

Thermal Expansion Properties

The following are the average coefficient of expansion properties after annealing in hydrogen for 1 hr at 1650°F (900°C) and 15 minutes at 2010°F (1099°C) and cooled to room temperature within 1 hr. Material heat treated using this procedure should not exhibit any transformation when cooled to -112°F (-80°C) for 4 hrs. This was determined by means of metallographic examination.
Mean coefficient of thermal expansion as annealed.
 

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

Product Parameters

Soft magnetic alloys are a class of alloys with high permeability and low coercivity in weak magnetic fields. According to the different elements that make up the alloy, it can be divided into electromagnetic pure iron (industrial pure iron), iron-silicon alloy, iron-nickel alloy, iron-aluminum alloy, iron-silicon-aluminum alloy and iron-cobalt alloy, etc.1J06,1J12,1J17,1J18,1J22,1J30,1J36,1J38,1J46,1J50,1J51,1J54,1J76,1J77,1J79,1J80,1J85,1J87

Permanent magnet alloy not only has high hardness and mechanical properties, but also has strong anti-demagnetization ability, high coercivity value (greater than 20kA/m), magnetic "hard" and other characteristics, so it is also called hard magnetic alloy.2J04,2J07,2J09,2J10,2J31,2J53,2J84,2J85Elastic alloys include high elastic alloys and constant elastic alloys. It is used to make elastic elements such as elastic sensitive elements, energy storage elements and frequency elements in precision instruments.3J01,3J21,3J53Expansion alloys(Invar Alloy) are divided into Kovar alloys, ceramic sealing alloys, low expansion alloys, and constant expansion alloys. Widely used in electronic industry, precision measuring tools, precision instruments and low temperature engineering and other fields.4J28,4J29,4J32,4J33,4J36,4J40,4J42,4J50
Precision alloys with nickel, chromium, aluminum and iron as the main components, the resistivity is about three times higher than that of manganese copper, and has a lower temperature coefficient of resistance and low thermal potential to copper, with good long-term resistance stability and resistance. Oxidation properties.
It is suitable for making precision resistance elements in various measuring instruments and meters, making precision micro-resistance elements and strain gauges.6J10,6J15,6J20,6J22,6J23,6J24

expansion alloy
Grade	C≤	S≤	P≤	Mn	Si	Ni	Cr	Cu	Al	Fe
6J10	≤0.05	≤0.01	≤0.01	≤0.3	≤0.2	nI+cO rem	9-10	≤0.2		≤0.4
6J15	≤0.05	≤0.02	≤0.03	≤1.5	0.4-1.3	55-61	15-18		≤0.3	rem
6J20	≤0.05	≤0.01	≤0.01	≤0.7	0.4-1.3	rem	20-23		≤0.3	≥1.5
6J22	≤0.04	≤0.01	≤0.01	0.5-1.5	≤0.2	rem	19-21.5		2.7-3.2	2-3
6J23	≤0.04	≤0.01	≤0.01	0.5-1.5	≤0.2	rem	19-21.5	2-3	2.7-3.2
6J24	≤0.04	≤0.01	≤0.01	1.0-3.0	0.9-1.5	rem	19-21.5		2.7-3.2	≤0.5

Detailed Photos

 

 

Company Profile

Our company Principle is  " Quality first, Customer first".

CHANGZHOU DLX ALLOY CO, LTD was established in 2002 and has got Iso9001 International Quality Management System Certificate and SGS Certificate. Our factory is professional in researching and producing special alloy material. From melting, drawing, heat treatment, finishing and testing .We offer nickel-based, copper-based, and iron-based alloys, including super alloy, welding materials, anti-corrosion alloy, precision alloy, FeCrAl alloy, NiCr alloy, CuNi alloy, thermocouple and etc, in the form of wire, strip, ribbon, bar, tube, plate.

What is your working time?

Monday-Friday : 8:30AM-17:00PM (Beijing time, GMT+08.00)

We have public holiday during May.1-3, Oct.1-7 and Chinese New Year holiday . Pls e-mail us during our holiday if u have any questions.

 

Do you provide free samples?

Yes, we can provide a free sample for testing,buyer should bear the shipping costs.

 

What is your payment terms?

T/T,L/C,D/A,D/P,Western Union,MoneyGram,Paypal

 

What is the lead time?

Usually sample lead time is 15 days after payment has been confirmed.