Kovar Ring Export to Canada: A Commitment to Excellence in ASTM F15 Precision Alloys
ZYTC Alloy is proud to announce the successful completion and delivery of a Kovar Ring export order to Canada, manufactured in strict accordance with ASTM F15 specifications. The order comprised three precision Kovar Ring specifications: 120*65*2.02, 163*115*2.02, and 213.02*138.06*2.02. Every Kovar Ring was produced following our rigorous standardized, process-driven, and specialized production and inspection protocols, ensuring that each Kovar Ring met the highest quality standards before final customer delivery.
Kovar is one of the most mature and trusted materials in ZYTC Alloy’s portfolio. As a nickel-iron-cobalt controlled-expansion alloy, Kovar (UNS K94610, Werkstoff Nr. 1.3981) is renowned for its unique thermal expansion characteristics that closely match those of borosilicate glass and alumina ceramics. This makes Kovar the material of choice for glass-to-metal sealing applications where reliability and thermal shock resistance are paramount. With years of expertise in Kovar metallurgy, ZYTC Alloy has exported Kovar products to multiple countries worldwide, earning a reputation for consistency, quality, and technical excellence.
Chemical Composition of Kovar (ASTM F15)
The chemical composition of Kovar is precisely controlled within narrow limits to ensure uniform thermal expansion properties. The nominal composition of Kovar per ASTM F15 is as follows:
| Element | Weight % |
|---|---|
| Nickel (Ni) | 29.0 |
| Iron (Fe) | Balance (approx. 53.0) |
| Cobalt (Co) | 17.0 |
| Carbon (C) | 0.04 max |
| Manganese (Mn) | 0.50 max |
| Silicon (Si) | 0.20 |
| Chromium (Cr) | 0.20 max |
| Aluminum (Al) | 0.10 max |
| Magnesium (Mg) | 0.10 max |
| Zirconium (Zr) | 0.10 max |
| Titanium (Ti) | 0.10 max |
| Copper (Cu) | 0.20 max |
| Molybdenum (Mo) | 0.20 max |
This precise Kovar chemistry is the foundation of its exceptional performance in hermetic sealing applications.
Mechanical Properties of Kovar
Kovar exhibits excellent mechanical properties that make it suitable for demanding engineering applications. The typical mechanical properties of annealed Kovar per ASTM F15 include:
| Property | Value |
|---|---|
| Tensile Strength | 518 MPa (75 ksi) |
| Yield Strength (0.1% Offset) | 340 MPa (49 ksi) |
| Elongation | 30-42% |
| Hardness (Rockwell B) | 80 HRB |
Kovar also demonstrates good ductility, making it readily formable and machinable using conventional methods. The Kovar alloy can be welded or brazed to steel, copper, and nickel, making Kovar suitable for bonding dissimilar materials.
Physical Properties of Kovar
Key physical properties of Kovar include:
| Property | Value |
|---|---|
| Density | 8.36 g/cm³ |
| Melting Point | 1449°C (2640°F) |
| Curie Temperature | 435°C (815°F) |
| Modulus of Elasticity | 207 MPa (20 × 10⁶ psi) |
| Thermal Conductivity (20°C) | 17.3 W/m·K |
| Electrical Resistivity | 49 μΩ·cm (490 μΩ·mm) |
| Specific Heat | 0.11 J/g·°C |
| Poisson's Ratio | 0.317 |
Kovar is magnetic at all temperatures below the Curie point. The thermal expansion coefficient of Kovar is its defining characteristic, matching the expansion rate of borosilicate glasses and alumina ceramics across a wide temperature range.
Applications of Kovar
Kovar finds extensive application across multiple high-technology industries:
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Hermetic sealing and glass-to-metal sealing in electronic components
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Power tubes, microwave tubes, transistors, and diodes
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Integrated circuit lead frames and flat pack packaging
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Hybrid circuit casings and oscillator housings
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Aerospace hermetic connectors and high-reliability sensor leads
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Defense and military electronic systems
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Medical devices and implantable electronics
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Scientific instruments and vacuum systems
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Semiconductor devices requiring hermetic integrity
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Telecommunications and optical equipment
The low thermal expansion characteristics of Kovar make it indispensable for applications requiring a reliable hermetic seal between metal and glass or ceramic components.
ZYTC Alloy’s Kovar Product Capabilities
ZYTC Alloy offers a comprehensive range of Kovar product forms to meet diverse customer requirements. We manufacture Kovar in:
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Kovar Sheet and Kovar Plate
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Kovar Strip and Kovar Coil
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Kovar Wire and Kovar Rod
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Kovar Bar and Kovar Tube
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Kovar Forgings and custom Kovar components
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Kovar Ring and precision-machined Kovar parts
We welcome custom orders and can manufacture Kovar products to customer drawings and specifications. Every Kovar product is produced under strict ASTM F15 standards, ensuring consistent quality and performance.
Why Choose ZYTC Alloy for Kovar?
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Standardized Production: Our Kovar manufacturing processes follow rigorous standardization protocols, ensuring every Kovar product meets or exceeds specifications.
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Process-Driven Quality: From raw material selection to final inspection, every step of Kovar production is controlled and documented.
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Specialized Expertise: With years of experience in Kovar metallurgy, ZYTC Alloy possesses deep technical knowledge of Kovar processing, heat treatment, and sealing preparation.
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Fast Delivery: We understand the importance of timely delivery and maintain efficient production schedules for all Kovar orders.
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Competitive Pricing: Our efficient operations allow us to offer high-quality Kovar products at reasonable prices.
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Global Reach: ZYTC Alloy has exported Kovar to multiple countries and continues to expand its international presence.
Quality Assurance
ZYTC Alloy executes standardized, process-driven, and specialized production and inspection procedures for every Kovar order. Our Kovar products undergo comprehensive testing to verify chemical composition, mechanical properties, dimensional accuracy, and surface quality. Only after passing all inspection criteria are our Kovar products released for customer delivery. This commitment to quality has made Kovar one of our most trusted and成熟 materials.
Contact ZYTC Alloy for Your Kovar Requirements
Whether you need Kovar Sheet, Kovar Strip, Kovar Wire, Kovar Rod, Kovar Bar, Kovar Tube, Kovar Forgings, or custom Kovar components such as Kovar Rings, ZYTC Alloy is your trusted partner. We produce Kovar to ASTM F15 standards with fast turnaround, competitive pricing, and uncompromising quality. Contact us today to discuss your Kovar project.
