Premium metal-to-glass sealing assemblies, aerospace modules, and high-precision CNC components.
A global benchmark in Kovar precision processing and special metal composites engineering.
Founded in November 2014, Xinyunyang Precision Technology Co., Ltd. has established itself as an industry pioneer. Sticking rigidly to the principles of Integrity, Innovation, Cooperation, and Sharing, we have committed ourselves to resolving the most challenging problems in special metallurgy processing.
By centering our core competitiveness around Kovar (ASTM F15) precision processing technology, we deeply penetrate high-demand fields including semiconductors, optical communications, aerospace, defense, medical machinery, and new energy. We provide reliable micro-machined and customized hermetic package lids, high-density connectors, and custom alloy frames to industry-leading enterprises globally.
High-precision processing capability Advanced technology and equipment Strict quality control Flexible customized servicesSupported by 3 Core R&D Capabilities
The company maintains a high-caliber technical team of over 100 specialists, with engineers making up 30% of our active workforce to continuously innovate material behavior and fabrication solutions.
Core specialists have focused on high-precision special alloy processing (such as Kovar, Invar, and Titanium) for more than a decade, paving the way for 5G, artificial intelligence, and new energy packaging requirements.
Backed by an ISO 9001 certified quality management framework and an automated scheduling platform. Regular logistics and production cycles are shortened by 15% to 20% compared to standard manufacturers.
A comprehensive chemical and physical blueprint for extreme high-reliability hermetic sealing.
ASTM F15 Kovar is a controlled expansion iron-nickel-cobalt alloy. It contains approximately 29% nickel and 17% cobalt, with the remainder composed of iron. Its coefficient of thermal expansion (CTE) is precisely calibrated to match that of borosilicate glasses (such as Pyrex) and alumina ceramics over a broad temperature range. This match prevents mechanical stresses and fractures during thermal cycling, making Kovar an indispensable material in high-vacuum, cryogenic, and high-frequency environments.
| Chemical Element | Nominal Content (%) | Maximum Limit (%) | Standard Specification (ASTM F15) |
|---|---|---|---|
| Nickel (Ni) | 29.0 | 28.5 - 29.5 | Controlled Thermal Coefficient matching Borosilicate Glass |
| Cobalt (Co) | 17.0 | 16.5 - 17.5 | Maintains structure under wide temperature gradients |
| Manganese (Mn) | 0.30 | 0.50 max | Scavenges oxygen, improves forgeability |
| Silicon (Si) | 0.15 | 0.30 max | Deoxidizing element in melting processes |
| Carbon (C) | 0.02 | 0.04 max | Low values required to avoid outgassing at high vacuum |
| Chromium (Cr) | - | 0.20 max | Minimized to avoid interference with oxidation |
| Iron (Fe) | Balance | Balance | Structural core and base alloy element |
High-grade Kovar ASTM F15 must remain free from phase transformation down to -80°C. Lower quality variants might experience an irreversible structural shift from FCC (Austenite) to BCC (Martensite) at sub-zero temperatures, which is accompanied by an abrupt volume expansion. This expansion tears apart the glass-to-metal seal, causing immediate hermeticity loss. Xinyunyang runs rigorous chemical profiling and cryogenic checks to safeguard absolute phase stability down to -196°C.
How Xinyunyang drives modernization and reliability across high-tech industries.
Providing custom glass-to-metal and ceramic-to-metal sealed packaging lids, high-power leadframes, and transistor outlines (TO-cans) that preserve chip integrity from external contamination.
Processing miniaturized Kovar carrier substrates and custom packages with low insertion loss, accommodating extreme operating frequencies above 40GHz and maintaining thermal stability.
Manufacturing ultra-precision electronic control housings, guidance sensors, radar components, and reliable micro-relays that withstand high G-forces and sudden thermal shocks.
Delivering high-reliability pacemaker implant housings, micro-machined sensor brackets, and endoscopic optical module housings where biocompatibility and leak-proof seals are paramount.
The standard expansion values of Kovar are critical to engineers calculating shear stress at material boundaries. Standard values of ASTM F15 alloy under precise annealing are detailed below:
| Temperature Range (°C) | Expansion Coefficient (10⁻⁶/°C) - Nominal | Expansion Coefficient (10⁻⁶/°C) - Maximum Limit |
|---|---|---|
| 30 - 300 | 4.7 - 5.2 | 5.5 |
| 30 - 400 | 4.6 - 5.1 | 5.2 |
| 30 - 450 | 5.1 - 5.5 | 5.7 |
| 30 - 500 | 5.8 - 6.2 | 6.8 |
Ensuring conflicts-free, environmentally clean, and regulatory compliant special alloys.
High-end global supply chains mandate more than dimensional accuracy. They require rigorous compliance with international laws, supply security, and sustainability guidelines. As a forward-thinking global supplier, Xinyunyang ensures that its ASTM F15 processing conforms to multiple environmental and political regulations, enabling frictionless imports for tier-1 OEMs.
All finished products are systematically screened and certified under the European Union RoHS (Restriction of Hazardous Substances) and REACH directives. Heavy metal concentrations like Lead, Cadmium, and Mercury are strictly controlled below detectable limits.
We trace 100% of our Cobalt and Nickel supply chains. We enforce strict supplier audits to guarantee all ores originate from validated, non-conflict-affected areas, offering complete peace of mind to our defense, military, and corporate clients.
Our intelligent digital scheduling and storage frameworks ensure flexible JIT (Just-In-Time) deliveries. With local distribution partners across Europe, North America, and Southeast Asia, we minimize lead times to under 15 working days.
A closer look inside Xinyunyang's advanced manufacturing and quality testing floors.
Pioneering next-generation manufacturing technology for Kovar and multi-metal composites.
Modern engineering trends demand higher integration densities and smaller dimensions. As components shrink, standard fabrication processes encounter severe limitations. Xinyunyang is actively investing in three primary technological paths to define the future of high-reliability glass-to-metal interfaces:
By upgrading our high-speed precision centers, we achieve dimension tolerances down to ±1.5 microns. This allows developers to pack multiple micro-pins into micro-optics hermetic structures without stressing physical barriers.
We are actively researching the co-processing of Kovar with Copper and Alumina variants to combine low thermal expansion with high thermal conductivity. These composite designs mitigate heat problems in 5G amplifiers.
Our upcoming production scheduling platforms will deploy advanced analytics to monitor tool wear in real time. This ensures consistent surface roughness (Ra < 0.2 microns) and zero-defect machining on critical Kovar orders.
In-depth responses to highly technical questions regarding Kovar ASTM F15 processing.
High-end specialty solutions, microwave packages, and ESG-validated hermetic seal bases.
Xinyunyang Precision