Kovar Bars & Wire

What is Kovar?

Kovar is a nickel-iron-cobalt alloy with controlled thermal expansion properties. It is often used in hermetic sealing applications. It is tough and versatile and has a coefficient of thermal expansion similar to hard glass. Kovar alloy is made with extensive quality controls to ensure uniformity in physical properties.

Kovar Bars and Wire are versatile, high-performance materials used in industries such as electronics, aerospace, automotive and medical device production. Kovar is composed of 29% Nickel, 17% Cobalt and 54% Iron which gives it unique characteristics that make it an ideal choice for applications requiring tight dimensional control. It has excellent thermal expansion properties which ensure a secure fit between components during extreme temperature fluctuations. Additionally, its superior strength makes it incredibly durable under pressure and vibration. The malleability of Kovar allows manufacturers to shape the material into complex shapes without compromising on performance. Its ability to be machined easily furthers its appeal for precision parts fabrication with intricate details.

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Table of Content

Kovar Wires are a key component in many products. These alloys are made of nickel, cobalt, and iron and contain a low coefficient of thermal expansion. Like Kovar Sheets, Kovar Wires has unique qualities allow them to be fabricated into many different parts. Unlike many other alloys, Kovar Wires chemical composition can be controlled within very narrow limits, ensuring uniformity in thermal expansion.

Lint Steels is a renowned manufacturing company that offers the best quality Kovar round bars and wires. Our company places strong commitments towards client satisfaction through excellence, reliable quality, and competitive pricing of different products. A wide variety of Kovar Bars and Wires sizes are available with immediate shipping and custom sizes.

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Composition of Invar Round Bars:

C, carbon
MN, Manganese
P, Phosphorus
S, Sulfur
Si, Silicon
Cr, Chromium

Along with the above materials, there are also other materials present in the composition of Kovar wires such as (Ni), Nickel, (Mo) Molybdenum, (Cu) Copper, (Co) Cobalt, (Ti) Titanium, (Al) aluminum, (Fe) iron, etc.

Features that make Kovar wires unique from other materials:

Good in Expansion Control.
Reliable hermetic sealing and metals sealing applications.
Uniformity all over.
Precise and uniform thermal expansion property.
Shock-resistant property.
Seal resistant to shock and cracking property.

Applications of the Kovar round bars:

Nickel-iron-cobalt based alloy Kovar round bars have end uses which are usually glass sealing in the electronics industry. Typical Kovar bars and wires used are glass-to-metal seals, lead frames, electronic package base, lids, power tubes, microwave tubes, transistors, diodes, hybrid packages, vacuum tubes, x-ray tubes, and light bulbs.

Some other applications are listed below:

Hermetic sealing.
transistors and diodes production in the electronic industry.
Vacuum systems in chemistry and scientific research.
Electronic tubes (power, X-Ray).
Hybrid circuit casings.
Oscillator housings.
Concentrated solar power.
Scientific instruments.

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Specifications of Kovar Bar

Standards :	UNS K94610 \| Werkstoff Nr 1.3981 \| DIN 17745 \| ASTM F15 \| AMS 7726 \| AFNOR NF A54-301 \| S.E.W 385
Size Range :	0.015″ Thk up to 2″ Thk
Thickness :	Range from .008″ to .0125″
Length :	2m, 2.44m, 3m, or as required
Width :	10-2500mm

Equivalent Grades of Kovar Round Bar

ASTM	UNS	Workstoff	AMS	DIN	AFNOR	S.E.W
F15	K94610	1.3981	7726	17745	NF A54-301	385

Types of Kovar Products We Offer

Kovar Round Bar

Kovar Wire

Kovar Forged Blocks

Kovar Square Bar

Kovar Hex Bar

Kovar Rectangular Bar

Chemical Composition of Kovar Wire

Weight %	Ni	Fe	Co	C	Mn	Si	Al	Cr	Mg	Zr	Ti	Cu	Mo
Alloy K Kovar	29.0	53.0	17.0	0.04 max	0.50 max	0.20	0.10 max	0.20 max	0.10 max	0.10 max	0.10 max	0.20 max	0.20 max

Mechanical Properties of ASTM F15 Kovar Round Bar

Material	Condition	Yield Strength (0.1% Offset)		Tensile Strength		Elongation %
Material	Condition	psi	MPa	psi	MPa	Elongation %
Alloy K Kovar	Annealed	49,000	340	75,000	520	42

KOVAR ROUND BAR WEIGHT CHART

Round Bar
Size	Kgs / Foot	Kgs / Mtr	Size	Kgs / Foot	Kgs / Mtr	Size	Kgs / Foot	Kgs / Mtr
3mm	0.017	0.055	20mm	0.753	2.470	3″	10.900	35.762
1/8″	0.019	0.062	22mm	0.908	2.979	3-1/4″	12.800	41.996
5/32″	0.029	0.095	7/8″	0.926	3.038	3-1/2″	14.850	48.772
4mm	0.030	0.098	24mm	1.080	3.543	3-3/4″	17.001	55.780
3/16″	0.043	0.141	25mm	1.180	3.871	4″	19.306	63.340
5mm	0.047	0.154	1″	1.210	3.970	4-1/4″	21.908	72.249
7/32″	0.058	0.190	26mm	1.271	4.170	4-1/2″	24.4487	80.340
6mm	0.068	0.223	27mm	1.368	4.490	4-3/4″	27.366	90.249
1/4″	0.076	0.249	1-1/8″	1.534	5.033	5″	30.461	99.940
7mm	0.091	0.298	30mm	1.691	5.548	5-1/2″	36.690	121.000
5/16″	0.118	0.387	1-1/4″	1.924	6.349	6″	43.860	143.900
8mm	0.120	0.398	32mm	1.894	6.314	6-1/2″	51.093	167.630
9mm	0.152	0.498	1-3/8″	2.303	7.550	7″	59.432	196.000
3/8″	0.170	0.557	35mm	2.390	7.553	7-1/2″	68.226	225.000
10mm	0.189	0.620	36mm	2.438	7.999	8″	77.586	254.55
11mm	0.228	0.748	38mm	2.792	8.903	10″	121.048	397.140
7/16″	0.232	0.761	1-1/2″	2.715	8.951
12mm	0.271	0.889	40mm	3.009	9.872
1/2″	0.303	0.994	1-5/8″	3.200	10.449
13mm	0.318	1.043	1-3/4″	3.712	12.179
14mm	0.368	1.207	45mm	3.807	12.555
9/16″	0.383	1.256	1-7/8″	4.260	13.977
15mm	0.424	1.391	48mm	4.330	14.205
5/8″	0.473	1.551	50mm	4.698	15.414
16mm	0.481	1.578	2″	4.848	15.906
17mm	0.543	1.791	2-1/8″	5.475	17.963
11/16″	0.573	1.880	2-1/4″	6.135	20.128
18mm	0.610	2.001	60mm	6.768	22.205
3/4″	0.682	2.237	2-3/8″	6.838	22.435
			2-1/2″	7.576	24.856
			2-5/8″	8.354	27.409
			2-3/4″	9.169	30.083

Kovar Round Wire Uses

There are many sectors and industries consuming Kovar Round Bar / Wire like:

Defence	Making arms and ammunition
Military	To produce Cold headed components
Automobile Industries to make nuts, bolts, shafts	Used in Agricultural sector
Manufacturing gears, bearings, and hinges	For Oil and Gas
Oil and Gas industry	Heavy engineering Industries

Kovar Round Bar Manufacturer

ATI Make Kovar Round Bar / Wire

Bohler Make Kovar Alloy Round Bar / Wire

Valbruna Group Make Round Bar / Wire

VDM Metals Make Kovar ® Alloy Round Bar / Wire

Some of Our Specialities

Looking for Hard To Find Alloys?
We at Lint Steels are specialists in Hard To Find Alloys. We regularly source materials from the USA, Europe, China & Japan for aerospace, defense, chemical, military, petrochemical, medical, nuclear applications.
We Specialize in Nickel Alloys, Cobalt Alloys, Titanium Alloys, Aluminum Alloys, Magnesium Alloys, Zirconium, Tungsten, Niobium, Tantalum, and lot more..!
We are exporting our products around the globe within 7-10 days, helping you in times of urgency.
We can customize products like forged parts, rings, special parts in various grades as per your requirement.
Email us now to get a quote within 24 hours..!

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Countries Where We Export Kovar Round Bar

Taiwan, Portugal, United Arab Emirates, Israel, Mongolia, Thailand, Canada, Finland, Trinidad & Tobago, Croatia, Qatar, Iraq, Gabon, Poland, China, Bulgaria, Ecuador, Chile, France, Afghanistan, Puerto Rico, Greece, Algeria, South Africa, Belarus, Philippines, Sri Lanka, Austria, Tibet, Ghana, Ukraine, Bahrain, Costa Rica, Egypt, Sweden, Switzerland, Serbia, Vietnam, Saudi Arabia, Morocco, Bhutan, Venezuela, Macau, Mexico, Slovakia, Oman, Zimbabwe, Czech Republic, India, Russia, Nigeria, Spain, Chile, Norway, Lebanon, Pakistan, Estonia, Peru, New Zealand, Germany, Azerbaijan, Australia, Hong Kong, United Kingdom, Malaysia, Hungary, Indonesia, Romania, United States, Colombia, Ireland, Angola, Japan, Yemen, Nepal, Gambia, Kenya, Denmark, Nigeria, Argentina, Kuwait, Lithuania, Belgium, Kazakhstan, Italy, Libya, Poland, Namibia, South Korea, Brazil, Bolivia, Singapore, Netherlands, Bangladesh, Tunisia, Turkey, Mexico, Jordan.

We Supply Kovar Wire in the following cities

Dubai	Abu Dhabi	Sharjah	Ajman	Al Ain	Ajman
Fujairah	Umm al-Quwain	Cairo	Manama	Istanbul	Baghdad
Riyadh	Ankara	Alexandria	Jeddah	Jeddah	Damascus
Basra	New Cairo	Doha	Kuwait City	Beirut	Sana’a
Yas Island	Muscat	Erbil	Aleppo	Marrakesh	Sharjah
Moscow	London	Saint Petersburg	Berlin	Madrid	Kyiv
Rome	Bucharest	Paris	Minsk	Vienna	Hamburg
Warsaw	Budapest	Barcelona	Munich	Kharkiv	Milan
Belgrade	Prague	Nizhny Novgorod	Kazan	Sofia	Birmingham
Brussels	Samara	Ufa	Rostov-on-Don	Cologne	Voronezh
Perm	Volgograd	Odessa	Sydney	Melbourne	Brisbane
Perth	Adelaide	Canberra	Hobart	Darwin	Gold Coast
Auckland	Christchurch	Wellington	Hamilton	Tauranga	Dunedin
Sao Paulo	Lima	Bogota	Rio de Janeiro	Santiago	Caracas

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Phone

+91 9920490522

Email

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Address

Head Office - Prasad chambers 912, 9th floor, Near Charni road station, Tata Road no. 2, Mumbai -400004.
Back Office - 32/34, Damodar Niwas, Second Floor, C. P. Tank, Mumbai 400004.