Xi'an Dongmeng Group Co., Ltd. is one of the most reliable manufacturers and suppliers of uns c10700 oxygen free silver-bearing copper in China, also supports customized service. With abundant experience, we warmly welcome you to wholesale cheap products in stock here and get free sample from our factory. For price consultation, contact us.
UNS C10700 Oxygen Free Silver-Bearing Copper, also known as CDA 107, is a high-purity copper alloy containing a small addition of silver for enhanced strength, thermal stability, and electrical conductivity. This material offers excellent resistance to oxidation and hydrogen embrittlement, making it ideal for high-temperature electrical, electronic, and vacuum applications. We supply C10700 Copper Rods, Bars, Plates, Sheets, and Wires in standard ASTM B170 / CDA 107 specifications, ensuring reliable performance for precision components, electrical contacts, and conductive parts.
01
High Quality
02
Advanced Equipment
03
Professional Team
04
Custom Service
Products Description
UNS C10700 Oxygen Free Silver-Bearing Copper (OFS), also known as CDA 107, is a high-purity copper alloy that contains a small amount of silver (Ag) to improve its mechanical strength, thermal resistance, and electrical conductivity.
With an oxygen content below 0.001%, C10700 Copper provides exceptional resistance to hydrogen embrittlement and oxidation, ensuring long-term performance even at elevated temperatures.
We supply C10700 Oxygen Free Silver-Bearing Copper in various forms, including:
Rods / Bars / Plates / Sheets / Strips / Wires / Custom Machined Parts
Standard specifications: ASTM B170 / UNS C10700 / CDA 107
Available in metric and inch dimensions, with custom cutting and machining services
Chemical Composition (Typical)
| Element | Content (%) |
|---|---|
| Copper (Cu) | 99.90 min |
| Silver (Ag) | 0.03 – 0.12 |
| Oxygen (O) | ≤ 0.001 |
| Others (total) | ≤ 0.05 |
Mechanical, Physical & Fabrication Properties
| Property | Typical Value (Annealed) | Typical Value (Cold-Worked / Hardened) | Units |
|---|---|---|---|
| Tensile Strength (UTS) | 250 – 300 | 350 – 450 | MPa |
| 0.2% Proof / Yield Strength | 70 – 120 | 200 – 300 | MPa |
| Elongation | 30 – 45 | 10 – 25 | % |
| Hardness | 60 – 80 | 90 – 120 | HV |
| Electrical Conductivity | 98 – 100 % IACS | – | |
| Thermal Conductivity | 380 – 390 | W/m·K | |
| Density | 8.89 | g/cm³ | |
| Melting Point | ≈ 1083 °C | °C | |
| Modulus of Elasticity | 115 – 125 | GPa | |
| Coefficient of Thermal Expansion | 16.8 × 10⁻⁶ | / °C (at 20–300 °C) | |
Fabrication Properties
| Process | Suitability / Remarks |
|---|---|
| Cold Working | Excellent - alloy can be drawn, rolled, and formed with minimal cracking. |
| Hot Working | Good - recommended temperature range 700 – 850 °C. |
| Machinability | Good; similar to tough-pitch copper with slightly better chip formation. |
| Weldability / Brazing | Excellent; silver-bearing copper welds cleanly without hot shortness. |
| Annealing Temperature | 350 – 500 °C, followed by slow cooling. |
| Softening Resistance | Superior to pure copper - retains strength up to 250–300 °C. |
Product Form Standards
| Product Form | ASTM / ASME | EN (Europe) | ISO | Notes |
|---|---|---|---|---|
| Sheet / Plate | ASTM B152 | EN 1652 | ISO CuAg0.1 family | General wrought Cu/Cu-alloy sheet & plate |
| Strip / Coil | ASTM B152 | EN 1652 | ISO CuAg0.1 | Cold-rolled strip for electrical components |
| Rod / Bar | ASTM B187 | EN 12163 (rod), EN 12164 (bar) | ISO CuAg0.1 | Machined parts, contacts, electrodes |
| Wire | ASTM B272 | EN 12166 | ISO CuAg0.1 | Fine wire for electrical contacts |
| Forgings / Forging Stock | ASTM B124/B124M (stock) | EN 12165 (forgings) | ISO CuAg0.1 | Switchgear, commutator parts |
| Tubes (mechanical) | ASTM B111 (where applicable family) | EN 12449 | ISO CuAg0.1 | Availability by enquiry; application-specific |
Note: Exact clause coverage for CuAg (C10700 / CW013A) within each standard may vary by revision and manufacturer scope. For project compliance, we provide Mill Test Certificates (EN 10204 3.1) listing the delivered grade, chemistry, and test results against the applicable standard.
Common Names & International Identifiers
Copper Silver Alloy is commonly known as Silver-Bearing Copper and is widely used under multiple international designations. With approximately 0.08–0.12% silver addition, it offers enhanced softening resistance and mechanical strength compared to electrolytic tough pitch (ETP) copper while maintaining nearly full conductivity. The identifiers below cover global equivalences for CuAg0.1 and related grades such as UNS C10700.
| Region / Standard | Designation | Standard Reference | Common Name |
|---|---|---|---|
| UNS / CDA (USA) | C10700 | ASTM B152 / B187 / B272 | Silver-Bearing Copper |
| EN (Europe) | CW013A | EN 1652 / EN 12163 / EN 12166 | CuAg0.1 |
| ISO | CuAg0.1 | ISO 1634-1 / ISO 5182 | Silver-Bearing Copper |
| BS (United Kingdom) | CuAg0.1 | BS 2871 / BS 2874 (Historical) | High-Conductivity Silver Copper |
| DIN (Germany) | CuAg0.1 | DIN 17666 / DIN 1787 | Silberkupfer (Silver Copper) |
| JIS (Japan) | C1070 | JIS H3100 | Silver-Bearing Copper |
Other Trade Names: CuAg Alloy, CuAg0.1, Silver Copper, Silver-Bearing Copper, High-Conductivity Silver Copper, CuAg Alloy Rod, CuAg Contact Wire.
Supplied worldwide by Dongmeng steel Syndicate with full traceability, mill certification, and export-grade packaging.
Common Product Forms & Dimensions
Copper Silver Alloy (C10700 / CuAg0.1 / CW013A) is supplied by Dongmeng steel in a full range of wrought forms - including bars, rods, plates, tubes, strips, wires, and custom profiles. Each product is manufactured to meet tight dimensional tolerances, with optional tempers such as Soft (O), Quarter Hard (H01), Half Hard (H02), Hard (H04), and Hard Drawn (H80) available on request. All material is delivered with full Mill Test Certificates (EN 10204 3.1) and conforms to ASTM, EN, and international standards.
| Form | Available Sizes (Imperial / Metric) | Applicable Specifications |
|---|---|---|
| Round Bar | 0.25" – 4" diameter 5 mm – 150 mm diameter |
ASTM B187, ASTM B133 |
| Flat Bar | 0.093" – 4" thickness range | ASTM B187 |
| Hexagon Bar | 0.25" – 4" A/F | ASTM B187 |
| Square Bar | 0.25" – 4" square | ASTM B187 |
| Bus Bar | 0.093" – 1" thickness | ASTM B187 |
| Tube (Seamless / Welded) | OD: 3 mm – 300 mm Wall Thickness: 0.5 mm – 20 mm |
ASTM B68 / B75, ASTM B188 |
| Sheet / Strip / Plate | Thickness: 0.1 mm – 50 mm Width: 100 mm – 600 mm |
ASTM B152 |
| Wire | Fine and medium gauges (e.g. 0.08" section size for select tempers) | ASTM B1, ASTM B2, ASTM B3 |
| Shapes / Profiles | Custom extruded or rolled forms | Hot extruded or hot rolled stock |
Applications
C10700 Oxygen Free Silver-Bearing Copper is widely used in electrical, electronic, aerospace, and vacuum equipment industries where conductivity and stability are critical.
Typical applications include:
Electrical conductors and bus bars
High-performance connectors and terminals
Resistance welding electrodes
Rotor and motor components
Vacuum tube and semiconductor bases
Cryogenic and superconducting equipment
Packaging & Delivery
Standard export seaworthy packaging (plastic film + wooden case)
Custom labeling and pallet packaging available
Fast delivery within 7–15 working days depending on order size
Global shipping with air, sea, and express logistics options
Quality Assurance
All UNS C10700 Oxygen Free Silver-Bearing Copper products are produced according to ASTM B170 / CDA 107 standards.
Each batch is tested and supplied with:
Material Test Certificate (MTC)
Chemical and mechanical analysis report
Dimensional inspection sheet
We ensure consistent quality, traceability, and performance for all supplied materials.
What is Oxygen Free Silver-Bearing Copper?
Oxygen Free Silver-Bearing Copper (OFC-Silver, C10700) is a high-purity copper alloy with a small silver content (0.015–0.05%) and ultra-low oxygen (≤0.0005%), offering excellent electrical and thermal conductivity with enhanced mechanical strength.
Features:
High electrical conductivity (≥101% IACS)
Excellent thermal conductivity (~398 W/m·K)
Low oxygen, high purity, resistant to hydrogen embrittlement
Silver improves high-temperature creep resistance and strength
Applications:
High-end electrical wiring and cables
Electronic components and connectors
Heat exchangers and industrial conductors
Vacuum and cryogenic equipment
In short, it is a high-conductivity, high-strength, low-impurity copper alloy ideal for electrical, electronic, and thermal applications.
Technical Comparison & Performance Analysis
1. Comparison with Standard Oxygen-Free Copper (OFC, C10200)
| Property | C10200 (OFC) | C10700 (OFC-Silver) | Notes |
|---|---|---|---|
| Copper Purity | ≥99.95% | ≥99.95% | Both ultra-pure |
| Silver Content | 0% | 0.015–0.05% | Silver enhances mechanical strength |
| Electrical Conductivity | ≥101% IACS | ≥101% IACS | Essentially the same |
| Thermal Conductivity | ~398 W/m·K | ~398 W/m·K | No significant difference |
| Tensile Strength | 210–240 MPa | 220–250 MPa | Slightly stronger with silver |
| Elongation | 35–50% | 35–50% | Comparable ductility |
| Creep Resistance | Moderate | Higher | Silver improves high-temperature stability |
| Corrosion Resistance | Excellent | Excellent | Both highly corrosion resistant |
Analysis: C10700 maintains the high conductivity of OFC but offers better strength and creep resistance, making it suitable for mechanical stress applications and high-temperature environments.
2. Comparison with Electrolytic Tough Pitch Copper (ETP, C11000)
| Property | C11000 (ETP) | C10700 (OFC-Silver) | Notes |
|---|---|---|---|
| Copper Purity | 99.90% | ≥99.95% | OFC-Silver is purer |
| Oxygen Content | ~0.02–0.04% | ≤0.0005% | Lower oxygen reduces hydrogen embrittlement |
| Electrical Conductivity | 100% IACS | ≥101% IACS | Slightly higher in C10700 |
| Thermal Conductivity | ~390 W/m·K | ~398 W/m·K | Better heat transfer in C10700 |
| Mechanical Strength | 210 MPa | 220–250 MPa | OFC-Silver stronger |
| Corrosion Resistance | Good | Excellent | OFC-Silver more reliable in sensitive applications |
Analysis: C10700 is purer, stronger, and more stable than ETP copper, ideal for high-performance electrical and thermal systems.
3. Performance Highlights of OFC-Silver (C10700)
Electrical & Thermal Conductivity: Maintains the highest conductivity, suitable for sensitive circuits and high-current applications.
Mechanical Strength: Silver addition improves tensile strength and creep resistance at elevated temperatures.
Purity & Reliability: Ultra-low oxygen content ensures minimal risk of hydrogen embrittlement and oxidation.
Versatility: Works well in aerospace, electronics, cryogenics, and high-end industrial applications.
Longevity: High corrosion resistance and mechanical stability extend service life compared to standard copper alloys.
FAQ – Frequently Asked Questions
Q1: What is the main difference between C10700 and C10100 (Oxygen-Free Copper)?
A1: C10700 contains a small addition of silver (Ag) which enhances softening temperature and creep resistance, making it better for high-temperature electrical applications.
Q2: Is C10700 suitable for vacuum or high-purity environments?
A2: Yes. Its extremely low oxygen content (<0.001%) prevents outgassing and makes it ideal for vacuum systems and electronic components.
Q3: Can C10700 be welded or brazed?
A3: Yes. It can be brazed, soldered, and resistance welded effectively. Fusion welding should be performed with proper precautions.
Q4: What standards apply to C10700?
A4: The main standard is ASTM B170 – Standard Specification for Oxygen-Free Silver-Bearing Copper, also referred to as UNS C10700 / CDA 107.
Q5: Can I request custom machining or fabrication?
A5: Absolutely. We provide CNC machining, turning, drilling, and polishing services according to drawings or samples.
contact us
📧 Email: office@dongmjd.com
📞 Phone / WhatsApp: +86 15769214734
We are a trusted supplier of UNS C10700 Oxygen Free Silver-Bearing Copper rods, bars, plates, and custom parts, offering competitive prices, fast delivery, and certified quality for global customers.
Hot Tags: uns c10700 oxygen free silver-bearing copper, China uns c10700 oxygen free silver-bearing copper manufacturers, suppliers, factory, ASTM B111 Copper Alloy Seamless Tube, ASTM B43 Seamless Red Brass Pipe, UNS C17000 Beryllium Copper Alloys, UNS C17200 Beryllium Copper Alloys, UNS C26800 Yellow Brass Copper Alloy, UNS C46400 Naval Brass Copper Alloy
