Engineered for maximum machinability and excellent electrical conductivity, optimizing production efficiency for advanced Barcelona workshops.
The metropolitan area of Barcelona, and the broader region of Catalonia, stands as one of Southern Europe’s primary centers for advanced engineering, automotive manufacturing, and metalworking. Historically dominated by classical manufacturing, the region is rapidly transitioning to high-tech sectors, including electric vehicle (EV) infrastructure, aerospace manufacturing, precision robotics, and green grid electrification. This technological leap has catalyzed a critical demand for structural materials that do not compromise between high electrical conductivity and rapid machinability.
Traditional pure copper (such as C11000) boasts exceptional electrical and thermal conductivity but presents severe manufacturing bottlenecks. It is notoriously gummy and soft, leading to long machining cycles, accelerated tool wear, and poor surface finishes when processed on high-speed CNC machines. C14700 Sulfur Copper (CuSP) represents the premier metallurgical solution. By incorporating a precise micro-alloyed fraction of sulfur (nominally 0.2% to 0.7%), we introduce finely dispersed copper sulfide particles that act as chip breakers without significantly degrading electrical conductivity (retaining upwards of 93% IACS).
For precision manufacturing hubs in Sant Cugat, Martorell, and Sabadell, swapping leaded brass or pure copper for C14700 Sulfur Copper means increasing CNC throughput by up to 40% while achieving clean, burr-free threads, sharp edges, and prolonged mechanical tooling lifetimes.
A deep metallurgical comparison to aid materials engineers in selection for electrical and industrial applications.
When engineering high-amperage connectors, gas cutting nozzles, or EV charging plug pins, design engineers frequently evaluate C14700 Sulfur Copper alongside C14500 Tellurium Copper. While both materials fall under the "free-machining high-conductivity" class, their microstructural behaviors and cost considerations differ slightly.
C14700 Sulfur Copper relies on sulfur to form copper sulfide inclusions. Under high-speed machining, these inclusions cause the chips to shear cleanly and break away from the cutting zone. This minimizes friction and localized heat build-up. The machinability index of C14700 is rated at 85 (compared to Free-Cutting Brass C36000 at 100), whereas pure copper is rated at 20. Economically, sulfur is more abundant than tellurium, making C14700 a highly cost-effective choice for large-scale production runs.
C14500 Tellurium Copper offers a similar machinability index of 85 but retains slightly better hot-working properties and a marginally higher resistance to hydrogen embrittlement. For Barcelona's tier-1 automotive component vendors, C14700 provides the optimal balance: saving unit costs on high-volume components while maintaining the strict conductivity ratings (≥90% IACS) required for high-efficiency electric powertrains and charging docks.
Supplying state-of-the-art specialized copper alloys to Europe's most demanding industrial sectors.
Why European procurement officers partner with Sichuan Kepai New Material Co., Ltd.
Our research and development and production team is composed of senior metallurgical experts who track global material trends. By leveraging industry-university collaborations, we have successfully developed high-performance tellurium, sulfur, and dispersion-strengthened copper alloys that match and exceed ISO standards.
Our comprehensive production system spans pure copper, oxygen-free copper, oxygen-free high-conductivity tellurium copper, nickel-tellurium copper, tin bronze, beryllium copper, and sulfur copper. These raw materials reduce tooling costs and enhance system conductivity.
Rooted in China's industrial manufacturing heartland, Kepai exports high-conductivity alloys globally. We maintain structured supply lines feeding critical European commercial depots, directly serving Spanish automotive, defense, and maritime electronics OEMs.
Our commitment goes beyond traditional manufacturing. We coordinate closely with client engineering departments to modify physical dimensions, custom-drawn profiles, and temper profiles, reducing our customers' pre-processing steps.
Modern industrial supply chains require complete consistency and predictable delivery times. Situated in the industrial zone of Guanghan, Sichuan, Sichuan Kepai is connected to key logistics corridors. By utilizing the Yuxinou (Chengdu-Europe) Railway, materials can be shipped via rail directly to European distribution networks, offering a faster alternative to traditional maritime routes. For bulk materials, we utilize ocean routes departing from major ports directly to the Port of Barcelona.
Our Factory 4.0 manufacturing processes use automated systems to monitor smelting temperatures, alloy composition, and extrusion rates in real-time. This guarantees that every batch of C14700 Sulfur Copper or C18150 Chromium-Zirconium Copper maintains a uniform distribution of free-machining elements, ensuring consistent machining behavior across different production runs.
This systematic control enables us to keep oxygen levels exceptionally low, which prevents the material from becoming brittle and ensures high thermal and electrical performance. For Barcelona's precision manufacturers, this consistency translates directly to stable setup parameters, predictable tool wear, and reduced scrap rates.
A traceably secure manufacturing process from raw copper cathode selection to precision testing.
Smelting
Laying-off
Extrusion
Drawing
Straightening
Package
Guaranteeing the physical, chemical, and electrical properties of our alloys.
Eddy Current Conductance Instrument
Chemical Composition Test Room
Metallographic Sample Polishing Machine
Microcomputer Servo Universal Testing Machine
Electronic Universal Testing Machine
Hardness Tester
Microstructural Evaluation Equipment
Laser Dimension Calibration Systems
Our production facilities maintain ISO certifications and meet EU environmental standards, including RoHS and REACH.
Get answers to common engineering, compliance, and supply chain questions from our technical specialists.
C14700 Sulfur Copper has a machinability rating of 85% compared to Free-Cutting Brass (C36000), which is the standard baseline at 100%. While slightly below leaded brass, C14700 offers significantly higher electrical conductivity (typically 90-95% IACS compared to brass's 26% IACS). This makes C14700 an excellent choice for components that require both high machinability and high electrical conductivity.
Yes, all our C14700 Sulfur Copper materials are compliant with RoHS and REACH standards. Unlike lead-bearing alloys that face strict regulatory limits in the EU, sulfur serves as an environmentally friendly alternative, allowing manufacturers to meet European environmental regulations while maintaining high machining throughput.
For standard orders, maritime freight from Shanghai or Shenzhen ports to the Port of Barcelona typically takes 30 to 35 days. For urgent projects, we can arrange rail transport via the Chengdu-Europe Express, which reduces land transit times to Central and Southern Europe. Small batch samples can also be dispatched via express air freight within 7-10 working days.
Yes, we offer custom tempers ranging from soft annealed (O60) to hard drawn (H04). We can supply copper in various shapes, including round rods, hexagonal profiles, square bars, flat wires, or custom extruded shapes designed to reduce pre-machining preparation times.
Explore our full range of specialty copper alloys, including chromium-zirconium and oxygen-free variants, engineered for high-performance applications.
Optimize your machining throughput and ensure product compliance. Our metallurgical engineers are ready to assist with alloy selection and specifications.
Kepai