High-demand precision refractory components engineered to meet rigorous aerospace, space propulsion, and extreme high-temperature industrial specifications in Southern California.
As the premier aerospace, defense innovation, and advanced research capital of the United States, Southern California represents one of the world's most demanding procurement markets for high-purity refractory metals.
The Greater Los Angeles metropolitan area—extending from the South Bay aerospace corridor (El Segundo, Hawthorne, Torrance, Long Beach) to the Pasadena research cluster and outward to the Mojave spaceport ecosystem—hosts the highest concentration of private space exploration firms, defense aviation primes, quantum engineering labs, and advanced medical device developers in the nation. In this cutting-edge environment, conventional materials fail under extreme thermal, corrosive, and superconducting stress. High-purity niobium plates and sheets (ASTM B393, R04200, R04210, C-103) have become indispensable raw materials for engineers pushing the frontiers of propulsion, cryogenics, and microelectronics.
Southern California's commercial aerospace renaissance has dramatically accelerated the demand for ductile, oxidation-resistant, and high-melting-point refractory alloys. From liquid rocket engine combustion chamber liners and radiation-cooled nozzle extensions to Superconducting Radio Frequency (SRF) particle acceleration cavities developed in collaboration with top academic institutions like Caltech and UCLA, niobium sheets provide an unmatched balance of formability, low thermal neutron absorption cross-section, and supreme mechanical stability at temperatures exceeding 1050°C (1922°F).
Supplying C-103 niobium-hafnium and R04200 pure niobium sheets for rocket engine skirts, thruster nozzles, hypersonic thermal shielding, and satellite attitude-control thrusters across Hawthorne and Long Beach.
Providing RRR > 300 ultra-pure niobium plates for superconducting radiofrequency (SRF) cavities, quantum qubit fabrication, particle accelerators, and fusion plasma containment liners in Southern California labs.
Milling high-density planar niobium sputtering targets and backing plates for dielectric optical coatings, electrochromic smart glass, SAW filters, and advanced microelectronic barriers produced in Silicon Beach.
Medical-grade ASTM F2384 / ASTM B393 niobium sheets offering supreme biocompatibility, osseointegration, and MRI artifact reduction for custom orthopedic plates, pacemaker casings, and surgical clips in Irvine and LA.
Providing heavy tantalum and niobium cladding plates for chemical reactor vessels, acid heat exchangers, and chlor-alkali equipment operating under harsh nitric and hydrochloric acid environments.
Custom thermal shields, heating elements, and charge carriers built from rolled niobium sheets for vacuum sintering furnaces, single-crystal growth furnaces, and specialized diamond-coating facilities.
Our state-of-the-art cold rolling, vacuum annealing, and precision slitting lines adhere strictly to international aerospace and industrial standards.
| Material Grade | UNS Number | Purity / Composition | Standard Thickness Range | Primary Los Angeles Applications |
|---|---|---|---|---|
| Type 1 (Reactor Grade Pure Nb) | UNS R04200 | Nb ≥ 99.95%, Low Impurities (Ta < 0.1%) | 0.05 mm – 25.0 mm | Superconducting RF Cavities, Nuclear Applications, Quantum Qubits |
| Type 2 (Commercial Pure Nb) | UNS R04210 | Nb ≥ 99.85% | 0.1 mm – 50.0 mm | Chemical Processing Equipment, Sputtering Targets, Anodes |
| Type 3 (Reactor Grade Nb-1%Zr) | UNS R04220 | Nb + 0.8–1.2% Zr | 0.2 mm – 20.0 mm | High-Pressure Sodium Vapor Lamps, Aerospace Structural Members |
| C-103 High-Temp Alloy | UNS R04295 | Nb-10Hf-1Ti-0.7Zr | 0.5 mm – 15.0 mm | Rocket Thruster Skirts, Hypersonic Leading Edges, Spacecraft Nozzles |
| Superconducting High-RRR Nb | Custom Ultra-Pure | Nb ≥ 99.99% (RRR ≥ 300) | 1.0 mm – 4.5 mm | Particle Colliders, Synchrotron Light Sources, Advanced Cryogenic Sensors |
Procuring raw materials for mission-critical applications requires uncompromising metallurgical consistency. Baoji Yunjie implements a multi-stage quality assurance protocol for every batch of niobium sheet and plate exported to the Los Angeles port and LAX cargo hub. Every shipment includes 100% full traceability with Certified Material Test Reports (CMTR / EN 10204 3.1) documenting:
Founded in 1995 and headquartered in Baoji, Shaanxi—China's "Titanium Valley" and the country's largest base for rare-metal processing—Baoji Yunjie Metal Products Co., Ltd. has specialized for over three decades in refractory and specialty metals, including tungsten, molybdenum, tantalum, niobium, titanium, nickel, and zirconium. Today, Yunjie is recognized as a leading specialist and innovator in the region's specialty-metal processing industry.
Yunjie operates a 15,000 m² manufacturing campus with 8,000 m² of integrated R&D, production, and office facilities, and a registered capital of RMB 15 million. The company has established comprehensive quality management, production assurance, and in-house R&D and innovation systems—providing end-to-end, hardware-to-process control that underpins stable quality and supports large-scale, high-precision manufacturing for global tier-one supply chains.
Our continuous investments in technological innovation, high-purity metallurgy, and precision fabrication have earned provincial and national accreditations.
Named a "Gazelle Enterprise" by Baoji High-tech Zone; certified by the Shaanxi Department of Industry and Information Technology as a "Specialized, Refined, Characteristic & Innovative (SRDI)" SME and a High-tech Enterprise.
Awarded Shaanxi Hidden Champion Enterprise, Demonstration Enterprise for Transformation & Upgrading of the Private Economy, and Shaanxi Industrial Premium Product Enterprise.
Upgraded to a Municipal-level R&D Institution for Industrial Enterprises (Baoji); in October 2024, accredited as a Baoji Municipal Military-Civil Fusion Enterprise. These credentials reflect Yunjie's growing industry recognition.
Focusing on special metals and alloys (W, Mo, Ti, Ta, Nb, Zr, Ni), Yunjie runs complete processing lines—including rolling (calendering), heat treatment, and sheet-metal & precision machining—enabling full in-house control from raw-material processing to finished-product delivery.
Guided by the principle "Quality ensures survival, efficiency drives growth, and continuous improvement earns customer satisfaction," Yunjie has continuously upgraded its quality systems for more than 30 years. With professional manufacturing services and consistently excellent product performance, we have earned the lasting trust of customers in China, Los Angeles, and around the world.
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Combining China's deepest raw material reserves with export-ready logistics to deliver fast, reliable, and tariff-optimized refractory solutions directly to California ports.
Eliminate intermediary markup by purchasing directly from our 15,000 m² Baoji production facility, achieving substantial cost savings on large-scale aerospace and R&D material procurements.
Direct container shipping to the Port of Los Angeles / Long Beach for high-tonnage orders, plus expedited air freight via LAX delivering urgent custom prototypes within 5-7 business days.
Near-net-shape custom cutting, precision shearing, laser edging, and deep-drawing services to match your exact CAD blueprints and CAD/CAM manufacturing requirements in California.
From ultra-thin pure foils and calibrated wire coils to heavy forged plates, thermal fields, and custom flanges—manufactured to exact ASTM, AMS, and ISO standards.
