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.

Kovar Round Bar / Wire

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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

F15 K94610 1.3981 7726 17745 NF A54-301 385

Types of Kovar Products We Offer


Kovar Round Bar

UNS K94610 Round Bar Stockholder in Australia | Kovar Hot Rolled Round Bars| Kovar Alloy Bar Stockist in Russia | Kovar® Round Bar | Alloy 29-17 Bars | Kovar ® Alloy Round Bars in Gulf | Kovar Round Bar Exporter in Europe | Super Alloy Kovar HR Round Bar in South America | ASTM F15 Kovar HR Bars | ASTM F15 Kovar Alloy 29-17 Round Bars | Kovar CR Bar | Kovar 1.3981 Round Bar Importer | Kovar Bar Supplier in New Zealand | Kovar Cold Rolled Round Bar in South East Asia

Kovar Wire

Alloy 29-17 Electrode Wire | Kovar Round Wire | Kovar Alloy Tig Welding Wire | Kovar MIG Welding Wire | Kovar Fine Wire | Kovar ® Alloy Wire Spools Stockist in Australia | Kovar Spool Wire in Europe | Kovar Coiled Wire | Kovar Filler Wire in New Zealand | Kovar Alloy Straight Wire | Kovar Thin Wire | Kovar Wires bobbins | Kovar Welding Wire Exporter in South East Asia | 1.3981 Wires Importer | Kovar Wires Cloth Supplier in South America | UNS K94610 Wires in Russia | Kovar Fine Wire in Gulf | Kovar Welding Electrodes
Forged Blocks

Kovar Forged Blocks

Kovar Fencing Forged Blocks in Europe | Kovar Woven Forged Blocks | UNS K94610 Forged Blocks in Russia | Kovar Hexagonal Forged Blocks | Kovar Alloy Square Forged Blocks Stockist in Australia | 1.3981 Forged Blocks | Kovar Rectangular Forged Blocks Supplier in South America | Kovar Plain Dutch Weave Forged Blocks Manufacturers | Kovar ® Alloy Forged Blocks in New Zealand | Alloy 29-17 Knitted Forged Blocks in South East Asia | Kovar® Fine Forged Blocks | Kovar Alloy Netting Forged Blocks| Kovar Welded Forged Blocks in Gulf | Super Alloy Kovar Forged Blocks Screen | Kovar Wire Cloth Mesh Manufacturer
Square Bars

Kovar Square Bar

ASTM F15 Kovar Square Bars Importer | 1.3981 Square Bar | Kovar Square Bars | Kovar Cold Rolled Square Bars in Australia | Kovar Alloy HR Square Bars Supplier in Gulf | Kovar ® Alloy Square Bar in Russia | Alloy 29-17 CR Square Bar | Super Alloy Kovar Square Bars Stockist in South America | Kovar Square Bars Exporter Stockholder in New Zealand | ASTM F15 Kovar Alloy Square Bar | UNS K94610 Square Bars | Kovar® K94610 Square Bars | Kovar Hot Rolled Square Bar | Kovar 1.3981 Square Bars Supplier in South East Asia
Hex Rods

Kovar Hex Bar

ASTM F15 Alloy 29-17 Hex Bars Importer | Kovar Alloy Hexagon Bars Stockist | Kovar Hexagonal Bar Stockist in Russia | Kovar® K94610 Hex Bar | Kovar ® Alloy CR Hex Bars in New Zealand | ASTM F15 Kovar Hexagon Bars | Alloy 29-17 Hex Bar Exporter in South America | UNS K94610 Hex Bars | Super Alloy Kovar Hexagonal Bars | Kovar 1.3981 Hex Bar Supplier in Europe | 1.3981 Hex Bar
Rectangular Rods

Kovar Rectangular Bar

Kovar Alloy K94610 Rectangular Bars Stockist in Australia | Kovar HR Rectangular Bars | UNS K94610 Rectangular Bars in Russia | Kovar 1.3981 Rectangular Bars | Kovar® CR Rectangular Bars in New Zealand | ASTM F15 Kovar Alloy Rectangular Bars | Kovar ® Alloy Rectangular Bar | 1.3981 Rectangular Bar | Kovar Rectangular Bars Supplier in South America | ASTM F15 Kovar Rectangular Bars

Chemical Composition of Kovar Wire

Weight % Ni Fe Co C Mn Si Al Cr Mg Zr Ti Cu Mo
Alloy K
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 %
psi MPa psi MPa
Alloy K
Annealed 49,000 340 75,000 520 42


Round Bar
SizeKgs / FootKgs / MtrSizeKgs / FootKgs / MtrSizeKgs / FootKgs / Mtr

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

Carpenter Technology

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

wooden pack rods

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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