Weight %. Tellurium inclusions break chips without seriously degrading conductivity; a trace of phosphorus deoxidizes the melt.
| Element | Symbol | Min % | Max % | Typical % |
|---|---|---|---|---|
| Copper (incl. Ag) | Cu | 99.2 | 99.6 | 99.4 |
| Tellurium | Te | 0.40 | 0.70 | 0.55 |
| Phosphorus | P | 0.004 | 0.012 | 0.008 |
| Property | Condition | Value | Unit |
|---|---|---|---|
| Tensile Strength | soft → hard | 230–400 | MPa |
| Yield Strength | soft → hard | 70–350 | MPa |
| Elongation | by temper | 8–45 | % |
| Electrical Conductivity | annealed | ~93 | % IACS |
| Thermal Conductivity | — | ~355 | W/(m·K) |
| Machinability | vs C36000 = 100 | 85% | — |
| Density | — | 8.94 | g/cm³ |
| Melting Range | solidus–liquidus | ~1050–1075 | °C |
| Standard | Designation |
|---|---|
| UNS / ASTM (USA) | C14500 — ASTM B301 |
| EN — equivalent | CW118C / CuTeP |
| Related pure copper | C11000 / Cu-ETP |
| Trade name | Tellurium Copper / Te-Cu |
C14500 is free-machining copper per ASTM B301 — 99.2–99.6% copper with 0.4–0.7% tellurium and a trace of phosphorus. The tellurium forms inclusions that break chips, lifting machinability to 85% (versus ~20% for pure copper) while retaining 93% IACS electrical conductivity.
Choose C14500 whenever the part has real machined geometry — threads, cross-holes, grooves, small diameters. The 7% conductivity penalty versus C11000 is usually invisible in service, while cycle times, tool life, and surface finish improve dramatically. Keep C11000 for simple high-current busbars where every %IACS counts.
The EN designation is CW118C (CuTeP) — the same tellurium-copper metallurgy. Bar stock typically certifies to either designation; we confirm certificate wording at quotation.
Yes — C14500 suits our sliding-head CNC and Swiss-type machines well, and is our recommended grade for machined electrical components such as connectors, terminals, and welding-torch parts. Parts are made to your drawing; send it for a quote within 24 hours.
Free-machining copper for electrical components — 93% IACS, made to your drawing. ISO 9001:2015. Quote within 24 hours.
Request a QuoteComposition ranges, mechanical properties, machinability ratings and regulatory data on this page are cross-referenced against the publishers below. Tolerances and minimum values are taken from the relevant published standard at the time of writing — for procurement specification, always reference the current published edition.
Last reviewed: June 2026. EN/ISO/ASTM standards are updated periodically. This datasheet reflects the editions listed; for safety-critical or contract-critical applications, always verify against the current published edition of the standard. For project-specific deviations or supplier-specific composition windows, request a Type 3.1 mill certificate (EN 10204) with your order.
Brassland machines C14500 into brass turned parts and CNC machined components to your drawing in Jamnagar, India, including precision turned brass components on 28+ Swiss-type lathes, with an EN 10204 3.1 certificate on every shipment.