Explore our flagship non-ferrous cast products engineered for extreme electrical conductivity, superior wear resistance, and mechanical resilience.
In modern industrial manufacturing, selecting premier High-Quality Copper Casting Factories & Companies is a pivotal strategic decision. Pure copper and high-performance copper alloys—such as Tellurium Copper (C14500), Beryllium Copper (C17200 / C17300), Chromium-Zirconium Copper (C18150), and Lead Bronze (C54400)—form the structural and electrical backbone of high-voltage electric vehicles (EVs), plasma arc cutting systems, subsea marine infrastructure, aerospace power generation, and precision electronic interconnects.
As the world transitions toward decarbonization, electrification, and Industry 4.0 automation, traditional foundry practices are no longer sufficient. Modern non-ferrous casting requires strict control over gas porosity, oxide inclusions, grain boundaries, and elemental segregation. Through continuous casting, vacuum induction melting (VIM), micro-alloying, and specialized heat treatments (precipitation hardening), leading specialized factories achieve ultra-high electrical conductivity (>85% to 100% IACS) coupled with elevated tensile strength (>1380 MPa in age-hardened beryllium alloys).
Established in May 2017, Sichuan Kepai New Materials Co., Ltd. stands as a national high-tech enterprise at the forefront of non-ferrous alloy research, continuous casting technology, and precision cold drawing. Spanning over 29,000 square meters of specialized production facilities, Kepai focuses on the independent R&D, casting, and extrusion of oxygen-free high-conductivity tellurium copper, beryllium cobalt copper, sulfur copper, and high-strength wear-resistant bronze alloys.
Driven by proprietary technological breakthroughs, Kepai solved the historic trade-off between electrical conductivity and free-cutting machinability. By developing oxygen-free tellurium copper with independent intellectual property rights, the company supplies critical components to over 1,000 high-end manufacturing enterprises across North America, Europe, East Asia, and Southeast Asia.
Understanding the metallurgical properties of specialized copper alloys is crucial for design engineers seeking optimal performance in thermal, electrical, and mechanical environments.
| Alloy Grade & UNS Standard | Primary Alloying Elements | Tensile Strength (MPa) | Electrical Conductivity (% IACS) | Machinability Index | Key Engineering Attributes |
|---|---|---|---|---|---|
| Tellurium Copper (C14500) | Te: 0.40–0.70%, P: 0.004–0.012%, Cu: Bal. | 250 – 380 | 85% – 93% | 85 (Free-Cutting) | Exceptional arc resistance, high thermal conductivity, zero chip sticking. |
| Beryllium Copper (C17200) | Be: 1.80–2.00%, Co+Ni: >0.20%, Cu: Bal. | 1100 – 1380 | 22% – 28% | 20 (Post-Anneal CNC) | Highest strength among copper alloys, anti-magnetic, non-sparking, fatigue resistant. |
| Beryllium Cobalt Copper (C17500) | Be: 0.40–0.70%, Co: 2.40–2.70%, Cu: Bal. | 650 – 850 | 45% – 60% | 50 (Moderate) | High thermal dissipation, excellent stress relaxation resistance at high temps. |
| Chromium Zirconium Copper (C18150) | Cr: 0.50–1.20%, Zr: 0.03–0.30%, Cu: Bal. | 480 – 620 | 80% – 88% | 30 (Medium) | Superior softening resistance up to 500°C, high resistance spot welding electrodes. |
| Nickel-Silicon Copper (C19160) | Ni: 0.8–1.2%, Si: 0.15–0.35%, Pb: 0.4–0.8% | 550 – 750 | 50% – 60% | 80 (High) | Precipitation strengthened (CuNiSi), corrosion resistant, high elasticity. |
| Lead Bronze / Bearing Bronze (C54400) | Sn: 3.5–4.5%, Pb: 3.5–4.5%, Zn: 1.5–4.5% | 380 – 520 | 15% – 20% | 80 (Self-Lubricating) | Excellent anti-friction properties, high fatigue strength, resistant to seawater corrosion. |
| Sulfur Copper (C14700) | S: 0.20–0.50%, P: 0.002–0.005%, Cu: Bal. | 240 – 360 | 85% – 92% | 85 (Eco-Alternative) | Free-machining alternative to leaded copper, eco-compliant, high conductivity. |
By utilizing upward continuous casting and vacuum induction melting, Kepai controls dissolved oxygen content below 10 ppm. This eliminates hydrogen embrittlement during high-temperature brazing and ensures a uniform, grain-refined crystalline matrix free of shrinkage cavities or slag entrapment.
Precise stoichiometry of trace elements (Te, Be, Co, Cr, Zr) creates sub-micron intermetallic precipitates during solution annealing and precipitation heat treatment. This micro-structural control maximizes yield strength while minimizing electron scattering.
In Tellurium (C14500) and Sulfur (C14700) copper alloys, microscopic CuTe and CuS phases act as natural chip breakers. This reduces tool wear by over 40%, enables extreme spindle speeds, and yields smooth surface finishes (<Ra 0.4 µm) without requiring toxic lead additions.
Why global tier-1 automotive, energy, and electronics OEMs partner with Sichuan Kepai for high-precision non-ferrous copper castings.
From raw electrolytic copper cathodes to melting, horizontal/upward continuous casting, hot extrusion, cold drawing, heat treatment, and precision CNC turning—all operations take place within Kepai's integrated 29,000 m² complex.
Equipped with flexible melting furnaces and modular casting dies, Kepai delivers custom alloy formulations, non-standard bar geometries, and tailored temper specifications in as fast as 7–10 days.
Direct proximity to high-purity copper smelting bases in Southwest China, combined with automated continuous drawing lines, minimizes raw material handling overhead and delivers 15–25% overall cost savings to international buyers.
100% traceabilty backed by Optical Emission Spectrometers (OES), eddy current flaw detectors, ultrasonic thickness gauges, hydrostatic pressure testing, and coordinate measuring machines (CMM).
Discover how Kepai's high-grade cast copper alloys solve mission-critical engineering challenges across demanding global sectors.
High-voltage liquid-cooled EV charging pins demand extremely low contact resistance to prevent thermal runaway at current densities exceeding 500A. Kepai's OFT Tellurium Copper (C14500) provides >93% IACS conductivity while supporting intricate CNC turned male/female pin geometries.
In MRI RF shielding, CT scanner high-power vacuum tubes, and antimicrobial hospital equipment, Kepai's ultra-pure C10100 Oxygen-Free Copper offers non-magnetic purity (<1.001 permeability), preventing magnetic field distortion while resisting hydrogen embrittlement.
Flight-critical power distribution systems operate under severe vibration and temperature fluctuations (-55°C to +200°C). Kepai's C17200 / C17300 Beryllium Copper provides tensile strengths over 1380 MPa combined with exceptional stress relaxation resistance.
High-strength lead bronze (C54400) and tin-phosphor copper alloys resist biofouling, cavitation erosion, and saltwater corrosion in submarine communication cable connectors, offshore oil platform pump bearings, and naval valve bushings.
Plasma nozzle tips and electrode holders operate under intense heat arcs exceeding 10,000°C. Kepai's C18150 Chromium-Zirconium Copper and tellurium copper provide elevated thermal dissipation and resist arc erosion, multiplying consumable service life by 3x.
Utility-scale solar battery storage inverters utilize Kepai's custom continuous-cast oxygen-free copper busbars and high-conductivity sulfur copper terminals to ensure high energy yield, minimal system losses, and 25+ years of operational durability.
Maintaining stringent quality control standards certified under international management frameworks.
Engineers from national key materials laboratories lead Kepai's alloy design team, actively formulating national and industry standards for tellurium copper and special non-ferrous alloys.
Full operational compliance with ISO 9001:2015 (Quality Management), ISO 14001:2015 (Environmental Management), and OHSAS 45001:2018 / ISO 45001 (Occupational Health & Safety).
Environmentally conscious manufacturing using eco-friendly free-cutting sulfur copper (C14700) and tellurium copper (C14500) to meet EU RoHS Directive 2011/65/EU and REACH SVHC regulations.
Complete catalog of specialized oxygen-free copper tubes, beryllium copper foils, tellurium alloys, and high-strength industrial materials.
Exporting high-precision non-ferrous copper castings and alloys to over 50 countries across North America, Europe, Asia-Pacific, and the Middle East.
Expert answers to technical inquiries regarding alloy selection, thermal-electrical trade-offs, casting tolerances, and OEM customization.
Need tailored alloy advice, physical samples, technical data sheets, or rapid RFQ quotes for your non-ferrous casting requirements? Our metallurgical engineers are ready to assist.
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