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Read MoreKovar Alloy Supplier and Stockist in India
Leading Kovar Alloy Stockist in Mumbai, India. Supplier of Kovar Alloy Sheets, Kovar Alloy Round Bars Stockist, Kovar Alloy Plates as per ASTM Standards. Reliable Aerospace-Grade Kovar Alloy Supplier & Exporter
Kovar Alloy (UNS K94610) is a nickel-cobalt-iron alloy specifically engineered to have a controlled coefficient of thermal expansion, closely matching that of borosilicate glass and ceramics. This unique property makes Kovar indispensable in aerospace and defense applications that require reliable glass-to-metal or ceramic-to-metal seals. Along with excellent dimensional stability, Kovar also offers good mechanical strength, making it a trusted choice for electronic packaging, hermetic seals, and high-reliability components used in satellites, aircraft systems, and defense technologies.
Kovar Alloy Stockist
At Bhansali AeroAlloys, we supply superior-quality Kovar round bars, sheets, plates, and custom forms tailored to meet the demanding requirements of aerospace and defense industries. With our commitment to precision, strict quality standards, and timely delivery, we ensure dependable performance for mission-critical applications. For technical guidance, pricing, or custom solutions, connect with our expert team today at sales@bhansaliaeroalloys.com
and partner with a trusted supplier of specialty alloys.
Type Analysis
| Element | Min | Max |
|---|---|---|
| Carbon | -- | 0.02 |
| Nickel | -- | 29.0 |
| Iron | Balance | Balance |
| Silicon | -- | 0.20 |
| Manganese | -- | 0.30 |
| Cobalt | -- | 17.0 |
Applications
Kovar alloy is widely utilized for producing hermetic seals with hard Pyrex glass and ceramic materials. It plays a key role in power tubes, microwave tubes, transistors, and diodes. In the electronics industry, Kovar is also employed in integrated circuits, particularly for flat packs and dual-in-line packages.
Physical Properties
| Property | Value |
|---|---|
| Specific Gravity | 8.36 |
| Density (lb/cu in) | 0.302 |
| Density (kg/cu m) | 8359 |
| Curie Temperature (°F) | 815 |
| Curie Temperature (°C) | 435 |
| Melting Point (°F) | 2640 |
| Melting Point (°C) | 1450 |
| Thermal Conductivity (Btu-in/ft²/hr/°F) | 120 |
| Thermal Conductivity (W/m-K) | 17.3 |
| Electrical Resistivity (ohm-cir mil/ft) | 294 |
| Electrical Resistivity (microhm-mm) | 490 |
| Modulus of Elasticity (psi x 10⁶) | 20 |
| Modulus of Elasticity (MPa x 10³) | 138 |
Thermal Expansion Properties
| Temperature | 77°F to | 25°C to | 10⁻⁶/°F | 10⁻⁶/°C |
|---|---|---|---|---|
| — | 212 | 100 | 3.25 | 5.86 |
| — | 392 | 200 | 2.89 | 5.20 |
| — | 572 | 300 | 2.85 | 5.13 |
| — | 662 | 350 | 2.72 | 4.89 |
| — | 752 | 400 | 2.81 | 5.06 |
| — | 842 | 450 | 2.92 | 5.25 |
| — | 932 | 500 | 3.41 | 6.15 |
| — | 1112 | 600 | 4.34 | 7.80 |
| — | 1292 | 700 | 5.06 | 9.12 |
| — | 1472 | 800 | 5.73 | 10.31 |
| — | 1652 | 900 | 6.25 | 11.26 |
Typical Mechanical Properties
| Property | Value |
|---|---|
| Yield Strength (ksi) | 50 |
| Yield Strength (MPa) | 345 |
| Tensile Strength (ksi) | 75 |
| Tensile Strength (MPa) | 517 |
| Elongation in 2" | 30 |
| Hardness (Rockwell B) | 68 |
Magnetic Properties
| Flux Density | 1830°F (30min FC) Permeability | 2010°F (20min FC) Permeability |
|---|---|---|
| 500 | 1000 | 1900 |
| 1000 | 1400 | 3500 |
| 2000 | 2000 | 5800 |
| 5000 | 2300 | 10000 |
| 10000 | 3400 | 8200 |
| 12000 | 3000 | 5000 |
Preparation for Sealing
| Step | Details |
|---|---|
| Degassing and Annealing | Parts should be degassed and annealed in wet hydrogen atmosphere to prevent carbon pickup. Heat within 1540–2010°F for 20 minutes to 2 hours, then cool below 570°F before removal. |
| Oxide Film | A thin, tightly adhering oxide film is formed by heating to 1200–1290°F in air until a dark gray to slight brown oxide appears. |
Workability
| Operation | Recommendation |
|---|---|
| Forging | Heat quickly, avoid soaking. Forge at 2000–2150°F to prevent sulfur pickup and oxide issues. |
| Coolant | Use Cool Tool with fatty esters to reduce friction and remove cutting heat. |
| Tooling | Use high-speed steel or carbide tooling such as T-15, M-3 Type 2, K-6, #370 Carboloy; ensure tools are sharp and edges are smooth. |
| Machining | Follow specific angles: end cutting 7°, nose radius ~0.005", side cutting 15°, back rake 8°, side rake 8°. Use appropriate feeds/speeds. |
| Drilling/Reaming | Use short drills with thin webs; speeds about 40 FPM, feeds 0.002–0.005" per rev. Reaming: half drill speed, triple feed. |
| Tapping | Use slightly larger tap drills; two or three fluted taps; nitrided tools recommended; speed ~20 FPM. |
Global Export Destinations for Our Kovar Alloy
We export Kovar Alloy to countries across the globe, including Afghanistan, Albania, Andorra, Austria, Bahrain, Bangladesh, Bhutan, Brunei, Belarus, Belgium, Bulgaria, Cambodia, China, Cyprus, Croatia, Czech Republic, Denmark, Estonia, Egypt, Finland, France, Germany, Greece, Georgia, Hungary, Iceland, Ireland, Italy, Indonesia, Iran, Iraq, Israel, Japan, Jordan, Kazakhstan, Kuwait, Kyrgyzstan, Lebanon, Latvia, Latin America, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Malaysia, Maldives, Mongolia, Myanmar (Burma), Nepal, North Korea, Netherlands, Norway, Oman, Poland, Portugal, Pakistan, Palestine, Philippines, Qatar, Russia, Romania, Russia, San Marino, Serbia and Montenegro, Slovakia, Slovenia, Spain, Sweden, Switzerland, Saudi Arabia, Singapore, South Korea, South Africa, Sri Lanka, Syria, Taiwan, Tanzania, Tajikistan, Thailand, Turkey, Turkmenistan, United States, Ukraine, United Kingdom, United Arab Emirates (UAE), Uzbekistan, Vietnam, Yemen
Domestic Cities Where We Supply Kovar Alloy
We supply Kovar Alloy to cities including Mumbai, Delhi, Kolkata, Chennai, Bengaluru, Hyderabad, Ahmedabad, Pune, Surat, Jaipur, Kanpur, Lucknow, Nagpur, Ghaziabad, Indore, Coimbatore, Kochi, Patna, Kozhikode, Bhopal, Thrissur, Vadodara, Agra, Malappuram, Thiruvananthapuram, Kannur, Ludhiana, Nashik, Vijayawada, Madurai, Varanasi, Meerut, Faridabad, Rajkot, Jamshedpur, Srinagar, Jabalpur, Asansol, Vasai-Virar City, Allahabad, Dhanbad, Aurangabad, Amritsar, Jodhpur, Ranchi, Raipur, Kollam, Gwalior, Durg-Bhilainagar, Chandigarh, and Tiruchirappalli.
