High-performance industrial alloys tailored for severe environmental conditions and heavy-duty operation.
Kyrgyzstan’s economic development is deeply linked to heavy industries, metallurgy, and mining sectors. Major open-pit mines and high-altitude processing facilities—such as the world-renowned Kumtor gold mine and the processing plants in Jeruy and Bozymchak—operate continuously under extreme environmental conditions. High mechanical loads, substantial dust levels, and dramatic temperature fluctuations require industrial components that exhibit remarkable wear resistance and low coefficients of friction.
This is where Lead Bronze excels. Composed of copper, tin, and a controlled distribution of lead, this alloy is specially engineered to provide superior self-lubricating properties. In heavy mineral processing machinery, planetary gearboxes, jaw crushers, and dragline excavators, standard brass alloys fail due to seizure under boundary lubrication conditions. Under heavy stress, the microscopic lead particles in lead bronze spread across the contacting surface, acting as a dry lubricant to prevent catastrophic component seizure.
Additionally, Kyrgyzstan’s expanding infrastructure sectors—including major railway maintenance hubs, heavy transport corridors, and hydroelectric installations—require reliable wear components like bushings, sliding bearings, and wear strips. Establishing a reliable, direct manufacturing supply chain for these specialized copper alloys is critical to minimizing downtime and improving overall equipment effectiveness (OEE).
Focus on high conductivity and high strength free cutting tellurium copper and other copper alloys
Established in May 2017, Sichuan Kepai New Materials Co., Ltd. is a high-tech private company specializing in R&D, production, and sales of high-conductivity and high-strength free-cutting tellurium copper, lead bronze, and other special copper alloys. Operating from a highly modernized manufacturing facility, Kepai supports high-end industries globally, offering exceptional precision and consistent material composition.
By leveraging custom horizontal and vertical continuous casting systems, along with advanced testing equipment, Kepai ensures that each batch of lead bronze meets strict international quality standards. This commitment makes us a reliable partner for industrial operations throughout Kyrgyzstan and Central Asia.
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A deep comparative overview of premium lead bronze alloys designed for high-stress boundary friction environments.
Understanding the metallurgical properties of lead bronze is essential for engineering selection. Standard alloys like CuPb10Sn10 contain a dispersion of lead within a strong tin-bronze matrix. The tin provides strength, hardness, and corrosion resistance, while the lead remains as discrete particles, providing a low-friction slide. Below is a mechanical data chart showcasing typical performance values of our primary lead bronze alloys compared to standard copper alloys:
| Alloy Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) | Main Applications |
|---|---|---|---|---|---|
| CuPb10Sn10 (C93700) | ≥ 220 | ≥ 110 | ≥ 8 | 70 - 90 | High-speed, heavy-load bearings, mill rolls, steel-backed bushings. |
| CuPb15Sn8 (C93800) | ≥ 200 | ≥ 100 | ≥ 6 | 65 - 80 | High-friction sliding parts, wear plates, mining machinery linkages. |
| CuPb5Sn5Zn5 (C83600) | ≥ 240 | ≥ 110 | ≥ 15 | 60 - 75 | Low-pressure valves, pump impellers, general-purpose bearings. |
| C36000 Lead Brass | ≥ 340 | ≥ 150 | ≥ 15 | 75 - 95 | High-speed free-cutting screws, fittings, pneumatic connectors. |
These values demonstrate that while high-lead copper alloys have slightly lower tensile limits than work-hardened pure coppers, their specialized microstructure makes them highly resilient in operations subject to dry friction, shaft misalignment, or abrasive mineral dust ingress.
Seamless border-crossing logistics, custom fabrication, and complete technical compliance documentation.
Our plant in Sichuan utilizes optimized routes through the Horgos and Irkeshtam land ports, ensuring transit times to major industrial zones like Bishkek, Osh, and Jalal-Abad are kept to a minimum.
Every shipment is accompanied by complete Mill Test Certificates (MTC) matching EN 10204 3.1 specifications, guaranteeing correct elemental distribution of copper, tin, and lead.
We supply raw hollow bars, continuous cast solid rounds, plate components, or finished machined bushings to match the exact engineering specifications of your machinery.
Where our high-performance copper and lead bronze alloys are deployed to ensure operation continuity.
Providing wear-resistant frame bushings and eccentric shaft bearings for cone and jaw crushers in major gold and ore processing facilities.
Precision-made guide vane bearings and wear plates built for water-control gates and turbine control linkages in hydro stations like Toktogul.
Supplying specialized wear pads, hot rolling mill slide plates, and thermal conductivity molds engineered for demanding high-temperature smelting plants.
Backed by international quality certificates (ISO9001:2015, ISO14001:2015, and OHSAS 45001:2018).
By controlling the continuous casting cooling rate, we ensure a highly uniform distribution of lead throughout the tin-bronze matrix, eliminating soft zones.
We refine chemical elements with strict tolerances to manage impurities, ensuring optimal mechanical wear values and preventing early component fatigue.
Equipped with optical emission spectrometers (OES), ultrasonic testing instruments, and tensile testers, we guarantee every shipment meets all required physical parameters.
Oxygen free and highly conductive tellurium copper alloy and lead bronze with independent intellectual property rights, meeting high-end manufacturing needs.
Comply with international standards such as ISO and IATF to ensure reliable product quality, environmental health, and occupational safety.
Access our complete inventory of premium copper, brass, and bronze alloys directly from the manufacturer.
Key insights for engineering and purchasing specialists looking to optimize performance and material lifecycle.
Lead bronze contains microscopic lead particles that stay suspended in the alloy structure. If lubrication fails during heavy operations, this lead acts as a solid, self-lubricating barrier. This helps protect the steel shafts of mining equipment from seizing, preventing unexpected breakdowns.
Our alloys are manufactured to conform to global standards including ASTM B505, ASTM B271, DIN 1716, and EN 1982. This ensures chemical consistency and structural integrity for critical equipment replacement parts.
We maintain strict control at every step of our process—from purchasing raw materials to final extrusion and casting. Our laboratory performs regular checks using optical emission spectrometers (OES) and mechanical testing systems, providing customers with complete quality trace documentation.
Standard custom production runs typically require 15 to 25 days depending on profile complexity. Transport from our Sichuan factory via Central Asian overland corridors takes approximately 10 to 14 days to arrive in Kyrgyzstan hubs, including customs clearance.
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