What C14700 copper bar solves - in one sentence: if you are machining pure copper connectors and fighting long, stringy chips, high tool wear, and low feed rates, C14700 sulfur-bearing copper bar gives you 90% IACS conductivity with 85% machinability - a combination that pure copper (20% machinability) simply cannot offer.
Pure copper (C11000) conducts electricity beautifully - but it machines terribly. The chips are long and stringy, tool wear is high, and CNC feed rates must be kept low. C14700 solves this by adding 0.2–0.5% sulfur to the copper matrix . The sulfur forms fine Cu₂S particles that act as chip breakers, producing short, broken chips and allowing 3–4× faster machining speeds compared to pure copper .
The result: a lead-free copper alloy bar with 90% IACS electrical conductivity and 85% machinability - ideal for high-volume CNC production of electrical connectors, terminals, and switch components .
As a China manufacturer, we produce custom sizes C14700 copper bar including round bars, solid rods and flat bars. Diameter, length, surface finish and tolerance can be customized according to your drawings. All C14700 copper bars comply with ASTM B301 and EN 12167. Mill Test Certificate (MTC) is provided for every batch for full material traceability. We maintain stock for standard sizes to support fast delivery for urgent orders.
Key Specifications
Chemical Composition (ASTM B301, wt.%)
| Element | Content |
|---|---|
| Cu (+Ag) | Balance (≥99.9) |
| S | 0.2–0.5 |
| P | 0.003–0.005 |
| Pb | <0.1 (Lead-Free) |
Physical Properties
| Property | Value |
|---|---|
| Electrical Conductivity | 90% IACS (52 MS/m) |
| Thermal Conductivity | 374 W/(m·K) |
| Density | 8.9 g/cm³ |
| Melting Range | 1067–1079°C |
| Thermal Expansion (0–300°C) | 17.6 × 10⁻⁶/K |
| Modulus of Elasticity | 118 GPa |
Mechanical Properties (Typical)
| Property | Value |
|---|---|
| Tensile Strength | 221–393 MPa |
| Yield Strength | 69–379 MPa |
| Elongation | Up to 52% |
| Machinability Rating | 85 (free-cutting brass = 100) |
How Buyers Choose: When to Select C14700 Copper Bar
Choose custom sizes C14700 copper bar if your project meets these requirements
- You produce electrical connector pins, contact pins, terminal pins or cylindrical conductive components that require high electrical conductivity.
- Mass production relies on high-speed CNC turning, drilling or milling, and you want to reduce tool cost and machining cycle time.
- Finished products need to be exported to EU, USA or other markets with RoHS/REACH lead-free regulations. Lead-containing alloys like C14500 or C36000 cannot be used.
- You need non-standard diameters or cut-to-length blanks instead of fixed standard bar lengths.
Choose alternative materials instead of C14700 in these cases
- If you only do simple stamping with minimal CNC turning: select C11000 pure copper bar for maximum conductivity and lower raw material price.
- If conductivity is not required and no RoHS restriction applies: free-cutting brass C36000 delivers the lowest machining cost.
- If products are for local non-export use with no lead restriction: C14500 leaded copper can be considered for cost saving.
If you are unsure which grade fits your application, send your part drawing, machining method and target export market. Our technical team will recommend the most cost-effective copper bar solution.
Available Bar Forms & Dimensions
We supply UNS C14700 / CW114C sulfur‑bearing copper in the following bar forms:
| Form | Available Specifications | Typical Applications |
|---|---|---|
| Round Bar / Rod | Diameter: 3mm – 200mm | Screw machine products, connector pins, terminals, cold‑headed parts |
| Hex Bar | Various sizes | Fasteners, fittings, machined components |
| Square Bar | Various sizes | Busbars, custom machined parts |
| Custom Shapes | Per engineering drawings | Special connectors, switch components |
Diameter range: 3mm to 200mm. Standard lengths available or custom cut‑to‑length.
Tempers available: OS050 (soft), H02 (half‑hard), H04 (hard), H06 (extra hard).
Surface finishes: Bright, polished, as‑drawn, or ground.
Key Advantages of Custom C14700 Copper Bar
- 85% Machinability & 95% IACS Conductivity: Balances high electrical conductivity and excellent chip-breaking performance for high-speed CNC turning
- Lead-Free & RoHS/REACH Compliant: No lead content, meets global electronics export requirements for EU, US and other regions
- Custom dimension service: Custom OD, length, straightness, tolerance and surface finish, cut-to-length C14700 copper bar available
- Strict straightness control: Minimizes secondary straightening work for pin and connector mass production
- Full batch inspection & MTC: Chemical and mechanical property test for each shipment, documents ready for customs and third-party audit
- Fast delivery for standard stock: Ready stock for common sizes to shorten lead time for urgent customer projects
- Global export support: Seaworthy export packaging, shipment to worldwide ports
Commercial and Delivery Term
| Item | Details |
|---|---|
| MOQ | 50 KG; small trial orders negotiable |
| Lead Time | 5–10 working days for standard stock C14700 copper bar for fast delivery; 12–22 working days for fully custom sizes |
| Payment Terms | T/T 30% deposit, 70% before shipment; L/C at sight for large orders |
| Price Terms | FOB, CFR, CIF. Main ports: Shanghai, Ningbo, Qingdao or any of china ports |
| Packaging | Export seaworthy package: waterproof film + wooden pallet / wooden case, anti-scratch protection for bar surface |
| Shipping | Sea freight, air freight; international courier for small test samples |
| Sample Service | Free small C14700 copper bar samples; buyer covers courier freight |
| Shipping Documents | Commercial invoice, packing list, MTC, certificate of origin |
How do I avoid procurement pitfalls when buying C14700?
Key Check List
- Verify the grade - confirm UNS C14700 / CW114C / CuSP equivalence .
- Check sulfur content - S 0.2–0.5% .
- Confirm phosphorus content - P 0.003–0.005% for deoxidation .
- Request the Mill Test Certificate - confirm compliance to ASTM B301 .
- Verify temper - H04 is common; confirm against your machining requirements.
- Request PMI verification - confirms material authenticity and sulfur content.
Comparison with Other Free-Machining Coppers
| Alloy (UNS) | Key Alloying Element | Machinability (% of C36000) | Conductivity (% IACS) | Key Trade-off / Note |
|---|---|---|---|---|
| C14700 | Sulfur (S) | 90% | ~95% | Best balance for most applications. Excellent conductivity with great machinability. |
| C14500 | Tellurium (Te) | 90% | ~95% | Very similar to C14700. Tellurium offers slightly better tool life in some operations. Often called "Tellurium Copper." |
| C36000 | Lead (Pb) & Zinc (Zn) | 100% (Benchmark) | ~26% | Free-Cutting Brass. Best machinability, but poor conductivity. Used where conductivity is NOT required. |
| C11000 | None (ETP Copper) | 20% | 100%+ | Pure copper. Worst machinability, best conductivity/formability. Used for wiring, busbars where no machining is needed. |
Not sure whether C14700 or C14500 is right for your application? Read the full C14500 vs C14700 free-cutting copper comparison first, then confirm your specification.
Typical Applications of C14700 Copper Bar
- Electrical connectors and terminals - stamped or machined
- Motor and switch components
- Transformer and circuit breaker terminals
- Clamps and cable glands
- Welding torch tips and nozzles
- Plumbing fittings and fasteners
For more details about the industry applications of ourC14700 Copper Bar , please visit our Product Applications Module.
Why Choose C14700 Copper Bar?
C14700 Copper Bar is the engineer's solution when you need to mass-produce a complex, precision part from copper that must also carry significant electrical current or dissipate heat. It sacrifices a negligible amount of conductivity to gain a massive improvement in manufacturability, reducing machining time, improving tool life, and lowering overall production costs for machined components. It is a classic example of a high-performance, specialized material designed for a specific set of industrial challenges.
C14700 Copper Bar is a versatile and reliable material that bridges the gap between high conductivity and ease of machining. Its unique combination of properties makes it an ideal choice for applications requiring precision, durability, and efficient electrical or thermal performance. Whether for electrical systems, thermal management, or machined components, C14700 delivers exceptional performance and value.
View full case study >>C14700 Sulfur‑Bearing Copper Round Rods Shipped To Thailand EV Electrical‑Component Manufacturer
About Us
HSMetal owns complete in‑house workflow for C14700 copper bar: billet smelting, hot extrusion, cold‑drawing, temper adjustment, precision cutting and finished‑goods inspection. For C14700 sulfur‑bearing copper bar, we tightly monitor sulfur‑content range to guarantee consistent free‑cutting performance for CNC processing. We support small trial sample orders as well as large‑volume export batches. Every batch passes spectral composition analysis, mechanical‑property test and dimensional checking before shipment, with traceable MTC documents.
Beyond C14700 copper bar, we supply comprehensive portfolio of non‑ferrous alloys: tellurium copper, aluminum bronze, nickel‑aluminum bronze, Hastelloy, Inconel, Kovar expansion alloy, titanium alloy and other special metal semi‑finished products. We serve electrical‑electronics, chemical‑processing equipment, aerospace, new‑energy and marine‑machinery industries.
We accept single‑grade bar orders as well as mixed consolidated shipments of multiple different alloy grades for one customer. With rich export experience for Thailand, Germany, USA and other global regions, we are familiar with international standards and export‑document requirements. Whether you only require C14700 copper bar, or you want one‑stop sourcing of multiple copper / nickel / titanium alloys, HSMetal can deliver traceable, cost‑effective metal‑material solutions.
Our Factory
Rolling Mill Equipment
Aging Treatment Equipment
Automatic Cold Drawing Line For Precision Copper Alloy Bars
Rotating+Passing Eddy Current Flaw Detector
Electron Microscope
German Spike Spectral Analyzer
Need Custom Sizes C14700 Copper Bar?
Tell us your required diameter, length, quantity, and machining application. We will confirm availability, provide a quotation, and ship with full documentation.
Related Knowledge Read our buying‑guide: Which Free‑Cutting Copper Do You Need? C14500 vs C14700
FAQ
Q1: What is C14700 copper bar used for?
A: C14700 is used for electrical connectors, terminals, switch components, motor parts, transformer and circuit breaker terminals, clamps, cable glands, welding torch tips, and plumbing fittings . It is chosen when you need high electrical conductivity combined with free-machining performance .
Q2: What forms of C14700 copper bar do you offer?
A: We offer round bars, hex bars, square bars, and custom shapes. Diameter ranges from 3mm to 200mm. Standard and custom lengths, multiple tempers (soft, half‑hard, hard), and surface finishes (bright, polished, as‑drawn, ground) are available.
Q3: What is the difference between C14700 and C14500 copper?
A: Both are high‑conductivity free‑cutting coppers. C14700 uses sulfur as the machining additive; C14500 uses tellurium. C14700 typically offers slightly higher conductivity (90–96% IACS) and is more cost‑effective. C14500 is often preferred for hot forging applications. Both have similar machinability ratings (~80% of C36000).
Q4: What is the machinability rating of C14700?
A: C14700 has a machinability rating of approximately 80% of free‑cutting brass (C36000) , significantly higher than pure copper. This enables high‑speed screw machine production with longer tool life.
Q5: What are the typical applications of C14700 copper bar?
A: Electrical connectors, relay contacts, switch components, automotive/EV terminals, sensor housings, battery terminals, cold‑headed parts, screw machine products, and plumbing fittings.
Q6:What is the difference between C14700 copper bar and pure copper bar?
A. Pure copper bar has 100% IACS conductivity but very poor machinability. C14700 copper bar adds sulfur for chip breaking, allowing high-volume CNC turning, while still retaining 95% IACS conductivity for electrical applications.
Q7: Can C14700 be heat treated?
A: No. C14700 is a solid‑solution alloy and cannot be strengthened by heat treatment. Strength depends on cold working (temper). Available tempers: OS050 (soft), H02 (half‑hard), H04 (hard), H06 (extra hard).
Q8: What is the machinability rating of C14700?
A: C14700 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.
Q9: What chips does C14700 produce during machining?
A: C14700's sulfur addition creates short, broken chips . This is a major advantage over pure copper's long, stringy chips, allowing higher feed rates, easier chip evacuation, and safer unattended machining.
Q10: Is C14700 resistant to hydrogen embrittlement?
A: Yes. C14700 is phosphorus-deoxidized, giving it resistance to hydrogen embrittlement . This is important for components exposed to elevated temperatures or reducing atmospheres.
Q11: What standards cover C14700?
A: C14700 is covered by ASTM B301 (Standard Specification for Free-Cutting Copper Rod, Bar, Wire, and Shapes) . The European equivalent designation is CW114C (CuSP) .
Q12: Can C14700 be welded?
A: C14700 has good soldering and brazing characteristics . Resistance welding (butt weld) is rated good. Inert gas shielded arc welding and gas welding are rated poor - these processes are not recommended .
Q13: What bar sizes are available?
A: Standard diameter: 3 mm – 180 mm (custom available) . Standard length: 1 m – 3 m (custom cut available). H04 temper standard, other tempers available on request.
Q14: Can I order custom sizes of C14700 copper bar?
A:Yes. As a China manufacturer, we produce custom OD, length, straightness and surface finish for C14700 copper bar. Cut-to-length blanks can be produced per your technical drawings.
Q15:Is C14700 copper bar RoHS compliant for export?
A: Yes. C14700 copper bar is lead-free and meets RoHS and REACH requirements. MTC and compliance documents can be supplied for customs clearance and third-party inspection.
Q16:When should I choose C14700 copper bar instead of leaded copper or brass bar?
A: Choose C14700 when you need both high conductivity and good machinability plus lead-free compliance for export. Leaded copper fails RoHS rules, and brass has far lower conductivity for electrical conductive parts.
Q17: Can I get a sample of C14700 copper bar for testing?
A:Free small C14700 copper bar samples are available. Customer pays courier freight, sample preparation takes 3–5 working days.
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