If you are machining electrical connectors, welding tips, or precision terminals from pure copper and fighting long stringy chips, high tool wear, and inconsistent surface finish - C14500 tellurium copper is the answer. It delivers 85–95% IACS conductivity with 85% machinability, a combination pure copper cannot match. You get the conductivity of copper with the machinability of brass - in rod, bar, sheet, and plate forms from a China manufacturer.
The one-line rule: C14500 (Tellurium Copper) → free-cutting, high-conductivity for precision electrical components. C14700 (Sulfur Copper) → cost-effective alternative for light-load contacts. C11000 (ETP Copper) → maximum conductivity when machining is not the limiting factor.
What Is C14500 Tellurium Copper?
C14500 Tellurium Copper is a premium free-machining copper alloy developed for high-precision electrical industrial use. As a professional China manufacturer, we produce standardized high conductivity free machining tellurium copper rod, bar, sheet and plate with strictly controlled 0.40%-0.70% tellurium content. Different from ordinary pure copper, the tellurium element forms uniform copper telluride particles inside the alloy, which breaks long copper chips during processing, realizing efficient free machining while retaining near-pure copper conductivity. All ourC14500 Tellurium Copper products comply with ASTM B301 standard, lead-free, RoHS and REACH certified, suitable for global industrial resale and precision manufacturing.
C14500 Tellurium Copper Technical Specification
| Item | Specification |
|---|---|
| UNS Grade | C14500 (CuTe, Tellurium Copper) |
| Relevant Standard | ASTM B301 |
| Chemical Composition (wt%) | Cu: 99.0 Min; Te: 0.40 ~ 0.70; Others: ≤0.10 |
| Electrical Conductivity | 90 ~ 93 % IACS (20℃) |
| Thermal Conductivity | ~380 W/m·K |
| Machinability Rating | 85% (C11000 pure copper = 20% reference) |
| Density | 8.94 g/cm³ |
| Tensile Strength (Hard temper) | 310 ~ 380 MPa |
| Tensile Strength (Soft / Annealed) | 220 ~ 270 MPa |
| Elongation (Annealed) | 20% min |
| Hardness (O temper annealed) | 60 ~ 70 HV |
| Hardness (H hard temper) | 90 ~ 110 HV |
| Available Forms | Tellurium Copper Rod, Tellurium Copper Bar, Tellurium Copper Sheet, Tellurium Copper Plate, custom cut blanks |
| Surface Condition | Mill finish, clean bare copper surface, no coating |
| Tolerance | Dimension tolerance follows ASTM B301; custom tight tolerance available upon request |
International Grade Equivalents
| Standard | Grade |
|---|---|
| USA | UNS C14500, ASTM B301 |
| China | QTe0.5 (GB/T 5231) |
| Europe | CuTeP, CW118C |
| Japan | C1450 |
| Germany | CuTeP (DIN 17672) |
Core Industry Pain Points
Most manufacturers struggle with an unavoidable performance trade-off when selecting copper materials, which seriously affects production efficiency and product yield:
- Pure C11000 copper pain point: Ultra-high conductivity but extremely poor machinability. Serious sticky copper phenomenon, long tangled chips block equipment, frequent shutdown cleaning, severe tool wear, high production cost and low finished product yield, unable to adapt to high-speed CNC mass production.
- Brass alloy pain point: Good machining performance but extremely low electrical and thermal conductivity, unable to meet high-current electrical component and heat dissipation application standards.
- Ordinary tellurium copper pain point: Unstable tellurium content from irregular suppliers, batch-to-batch performance difference, inconsistent machining effect and conductivity, easy to cause defective products and engineering debugging failures.
- Processing dilemma: High-precision electrical contacts, EV terminals and plasma nozzles require both high conductivity and tight tolerance machining, no universal copper material can meet dual standards.
Our Solution: C14500 Tellurium Copper
Our C14500 Tellurium Copper | High Conductivity Free Machining Tellurium Copper Rod, Bar, Sheet & Plate perfectly solves the industry's copper material performance trade-off dilemma. As a reliable China manufacturer, we precisely control the alloy composition to ensure every batch of C14500 tellurium copper has stable free machining capability and high electrical conductivity. It thoroughly improves the problems of sticky copper, tool loss and low efficiency in pure copper processing, while avoiding the low conductivity defect of brass, helping customers greatly reduce production costs, improve processing efficiency and stabilize product quality.
Commercial & Delivery Term
| Item | Detailed Terms |
|---|---|
| Product Name | C14500 Tellurium Copper |
| Grade Standard | UNS C14500, ASTM B301 Standard, CuTe Alloy (Te: 0.40%-0.70%) |
| Available Forms | Tellurium Copper Rod, Tellurium Copper Bar, Tellurium Copper Sheet, Tellurium Copper Plate, Custom Cut Blanks |
| Core Performance | 90-93% IACS High Conductivity, 85% Free Machinability, Short Chip Processing, Low Tool Wear |
| Certification | MTC Mill Test Certificate, SGS, RoHS, REACH Compliance |
| MOQ | Standard sizes: 50KG; Custom sizes: 100KG |
| Sample Service | Free small samples available, freight collect; sample fee refundable for bulk orders |
| Packaging | Seaworthy export packaging: waterproof film + wooden pallet/wooden case |
| Lead Time | Stock products: 3-7 working days; Custom processing: 12-20 working days |
| Price Basis | FOB(Shanghai / Tianjin) or any of China ports CIF, CFR or EXW |
| Payment Terms | T/T 30% deposit, 70% balance before shipment; L/C available for large orders |
| Shipping Method | Sea freight / Air freight, global delivery support |
| Inspection & Documents | Third-party inspection acceptable; Provide commercial invoice, packing list, full material certificates |
Why Choose Our C14500 Tellurium Copper?
Numerous suppliers provide tellurium copper products, but only our China-manufactured C14500 Tellurium Copper, High Conductivity Free Machining Tellurium Copper Rod, Bar, Sheet & Plate can solve your core production problems stably and long-term:
- Professional factory guarantee: We are a focused C14500 tellurium copper manufacturer, with independent alloy smelting, rolling and processing workshops, no middlemen markup, cost-effective and stable supply.
- Strict technical standard: Most merchants sell generalized copper alloys with unstable tellurium content; we strictly follow ASTM standards for fixed ratio alloying, ensuring consistent conductivity and machinability of each batch of tellurium copper rod, bar, sheet and plate.
- Lower comprehensive production cost: Superior machinability saves tool replacement and labor time, high yield reduces waste loss, high conductivity improves product qualification rate, bringing long-term cost reduction for your factory.
- Complete export service: Rich experience in European, American and Southeast Asian export business, proficient in international logistics, customs declaration documents and third-party inspection, supporting global resale and engineering procurement.
- Professional technical support: Provide free material selection guidance, CNC machining parameter suggestions and pre-production sample testing services to avoid engineering risks.
- Full ASTM B301 / GB/T 5231 compliance. Every shipment includes a Mill Test Certificate (MTC) with chemical composition and mechanical properties verified to ASTM B301 or GB/T 5231.
- Custom sizes cut to your drawing. Rod diameter from 3 mm to 100 mm, sheet/plate thickness from 0.5 mm to 50 mm, custom cut lengths. No wasted material.
- Multiple tempers in stock. H02 (Half Hard) and H04 (Hard) tempers available to match your strength and formability requirements.
About Us
HSMetal is a professional China manufacturer and exporter specializing in high-performance copper alloy materials, including C14500 tellurium copper, tellurium copper rod, bar, sheet and plate, phosphor bronze, beryllium copper, aluminum bronze, nickel aluminum bronze, pure copper and other custom copper alloy profiles.
With decades of accumulated metallurgy experience and stable upstream raw material supply chain, we focus exclusively on copper alloy production, precision cutting, slitting and custom blank processing. Our internal quality control system covers incoming raw material spectroscopy inspection, mechanical property testing, dimension verification and batch traceability for every copper alloy shipment. We strictly follow ASTM international standards for copper grades such as UNS C14500 tellurium copper, ensuring consistent chemical composition, conductivity and machinability for global buyers.
We serve industrial customers across Europe, the Middle East, Southeast Asia and North America, supplying copper alloys for EV new energy, electrical contacts, power transmission, precision CNC machining, instrumentation and thermal dissipation applications. Our core product C14500 tellurium copper - high conductivity free machining tellurium copper rod, bar, sheet & plate - is widely adopted by component manufacturers for high-current contact parts and precision machined copper components.
Our mission: Deliver stable, high-quality copper alloy materials with full technical transparency to global industrial manufacturers and distributors.
Our Factory
Our Team
Aging Treatment Equipment
Rolling Mill Equipment
Straight Pipe Cutting Machine
Product Quality Control
Exhibitions And Customer On-site Inspections
Typical Applications
Our C14500 Tellurium Copper | High Conductivity Free Machining Tellurium Copper Rod, Bar, Sheet & Plate is widely used in scenarios that require both high conductivity and precision machining, covering multiple high-end industries:
- New Energy & EV Industry: EV charging terminals, new energy vehicle conductive connectors, battery contact pins, high-current busbar accessories
- Electrical Power Industry: Switch contacts, relay conductive parts, circuit breaker components, high-power electrical connection terminals
- Precision CNC Machining: Swiss lathe precision copper pins, customized conductive shafts, mechanical precision copper structural parts
- Welding & Thermal Industry: Plasma cutting nozzles, welding torch conductive tips, heat dissipation copper sheets and plates
- Instrument & Aerospace: Precision instrument conductive components, sensor contact parts, aerospace lightweight conductive accessories
Need C14500 Tellurium Copper in Rod, Bar, Sheet, or Plate Form?
Get your free C14500 Tellurium Copper sample and customized quotation within 24 hours! Inquiry our high conductivity free machining tellurium copper rod, bar, sheet & plate now. We provide complete MTC test reports, RoHS certification and professional technical support, support small batch trial order and bulk wholesale. Trust professional China C14500 tellurium copper manufacturer to solve your precision copper machining and conductivity problems perfectly.
Or contact our technical team with your conductivity, machining, and erosion requirements - we will recommend the right alloy and temper for your design.
Explore our other copper products → [C14700 Sulfur Copper Rod] | [C11000 ETP Copper Bar] | [C17510 Beryllium Copper] | [C19400 Copper Alloy Strip]
FAQ
Q1: What is C14500 tellurium copper used for?
A: C14500 is used for electrical connectors, transistor bases, motor parts, switch components, welding torch tips, plasma cutting nozzles, plumbing fittings, and precision machined terminals. It is chosen when you need high conductivity combined with free-machining performance.
Q2: What forms of C14500 tellurium copper are available?
A: We supply C14500 in rod, bar, sheet, and plate forms. Rod diameter 3 mm to 100 mm; sheet/plate thickness 0.5 mm to 50 mm; custom cut lengths available.
Q3: What is the difference between C14500 and C14700?
A: C14500 contains tellurium (0.4–0.7%); C14700 contains sulfur. Both deliver similar conductivity (85–95% IACS) and machinability (85). C14500 offers superior anti-electrical-erosion performance; C14700 is more cost-effective because sulfur is cheaper than tellurium. Choose C14500 for electrical contacts and precision terminals; choose C14700 for light-load contacts and lamp fittings.
Q4: What is the electrical conductivity of C14500?
A: C14500 delivers 85–95% IACS electrical conductivity (typical 93%). This is significantly higher than brass (C36000: ~26% IACS) and approaches the conductivity of pure copper (C11000: 101% IACS).
Q5: What is the machinability rating of C14500?
A: C14500 has a machinability rating of 85 (free-cutting brass = 100). This compares to 20 for pure copper (C11000) - a 4× improvement in machining speed and chip control.
Q6: What chips does C14500 produce during machining?
A: C14500's tellurium addition creates short, broken chips that clear easily. This is a major advantage over pure copper's long, stringy chips, allowing higher feed rates, easier chip evacuation, and safer unattended machining.
Q7: Is C14500 resistant to electrical erosion?
A: Yes. C14500 has superior anti-electrical-erosion performance compared to other free-cutting coppers. This makes it suitable for electrical connectors, switch components, and relay parts where contact erosion limits service life.
Q8: What standards cover C14500?
A: C14500 is covered by ASTM B301 (Free-Cutting Copper Rod, Bar, Wire, and Shapes). The Chinese equivalent is QTe0.5 (GB/T 5231). The European designation is CuTeP (CW118C).
Q9: Can C14500 be welded?
A: C14500 has excellent soldering and good brazing characteristics. Oxyacetylene welding is rated fair; gas shielded arc welding is fair; coated metal arc welding and resistance welding are not recommended.
Q10: What is the maximum service temperature of C14500?
A: C14500 has a softening temperature of approximately 350°C. It is suitable for continuous service up to approximately 200°C in air. Above this, softening and oxidation increase.
Q11: How do I avoid procurement pitfalls when buying C14500?
A: Key checks:
- Verify the grade - confirm C14500 / QTe0.5 / CuTeP equivalence.
- Check tellurium content - Te 0.40–0.70%.
- Confirm phosphorus content - P 0.004–0.012%.
- Confirm the temper - H02 or H04; verify against your strength and machining requirements.
- Request the Mill Test Certificate (MTC) - confirm compliance to ASTM B301.
- Request PMI verification - confirms material authenticity and tellurium content.
Q12: What is the one-line rule for choosing C14500?
A: Choose C14500 tellurium copper when you need 85–95% IACS conductivity combined with 85% machinability and superior anti-electrical-erosion performance for electrical connectors, welding tips, and precision terminals - in rod, bar, sheet, or plate form. For cost-effective light-load contacts, choose C14700 (sulfur copper). For maximum conductivity, choose C11000 (ETP copper).
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