Kovar Sheets / Plates / Foil Supplier, Stockist

Kovar Sheet is an alloy composed of nickel, cobalt, and iron. It has excellent mechanical properties and a very low coefficient of thermal expansion. Kovar Plate is also available in a variety of thicknesses to suit your needs. The material can be machined, formed, or stamped into complex shapes with superior dimensional control over other alloys. Kovar foils are ideal for applications where high electrical conductivity and constrained materials expansion are required. They provide superior corrosion resistance in aggressive environments and offer excellent weldability making them ideal for most industries including aerospace, electronics, medical, telecommunications, and automotive. Kovar Sheet offers many advantages for demanding applications requiring precision manufacturing capability.

Lint Steels is a renowned Producer, stockist, and supplier of high-quality Kovar Sheets. We are providing these Kovar Plates as per the dimensions desired by our clients. We are using the best available raw materials for the production of these Kovar Coils.

What is a Kovar?

It is an alloy mixed mainly of Iron, nickel, and cobalt and has heat expansion qualities as heat-resistant glass. It is regularly fused to glass to form a gas seal. The coefficient of thermal expansion is the most essential mechanical feature of Kovar. The alloy is precisely fabricated and controlled to manufacture a coefficient of thermal expansion that is very close to that of hard glass (e.g. borosilicate glass) or ceramic, which means that it expands and contracts at the same rate.

Kovar Sheets / Plates / Foil

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What are Kovar Sheet?

The Sheet is a controlled expansion alloy. It is a Nickel Iron alloy with a combination of 29% Nickel, and 17% Cobalt, and the remaining balance is Iron. The quality of extension of Kovar matches both the borosilicate glasses and alumina ceramics which makes it one of the most admired controlled expansion alloys for hermetic sealing applications.

What are Kovar Coil?

It is produced to ensure good properties for machining and the deep drawing and is a porosity-free product.

What are Kovar Plates?

It not only possesses thermal expansion similar to glass but its nonlinear thermal expansion curve can often be made to match glass, thus allowing the joint to tolerate a wide temperature range.

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Features of KOVAR Sheets:

  • Resists erosive wear
  • good quality impact & thermal shock resistance
  • Resists heat & oxidation
  • Abrasion & corrosion resistant
  • Resists seizing & galling

Advantages of KOVAR Plates:

  • Expansion Control
  • Reliable hermetic sealing applications
  • Uniformity
  • Precise thermal expansion description

Application of Kovar Coil: It is perfect in those industrial areas where it is used in conjunction with glass or ceramic materials, especially where a hermetic seal is maintained across a wide temperature range.

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Specification of Kovar Plates

Standard Specification :UNS K94610 | Werkstoff Nr 1.3981 | DIN 17745 | ASTM F15 | AMS 7726 | AFNOR NF A54-301 | S.E.W 385
Dimensions :ASTM, ASME, and API
Sheets Thickness :Range from .008″ to .0125″
Plates Thickness :Ranges from .0125″ to 5.00″
Sheets/Plates Width :1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, etc
Sheets/Plates Length :2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc
Tempers :Annealed, 1/4, 1/2 Hard, 3/4 Hard, Full Hard
Hardness :Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc.
Value Added Service :Cladding, Heat Treatment, Annealed, Pickling, Polish, Rolling, Cutting, Bending, Forging, Minor Fabrication Etc.

Equivalent Grades of Foil

F15 K94610 1.3981 7726 17745 NF A54-301 385

Type of Kovar Sheets


Kovar Sheets

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Kovar Plates

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Chemical Composition of Kovar Plates

Chemical Analysis
Cr 20 nom
Ni 35 nom
Mo 10 nom
Co 35 nom

Mechanical Properties of Kovar Foil

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

Kovar Sheets Uses

There are many sectors and industries consuming Kovar Sheets / Plates / Foil like:

Digesters and bleach plants in the paper industrySulfuric acid reactors
Components exposed to sour gasMilitary
Oil and Gas industryDefence & Aerospace Industries
Organic chloride process equipmentEvaporators, heat exchangers, filters and mixers used in sulfuric acid environments.
Equipment for flue-gas desulfurisation plantsEquipment for processes utilizing halide or acid catalysts

Some of Our Specialities

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Countries Where We Export Kovar Sheets & Plates

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

We Supply Kovar Foil 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