Copper Silver Alloy (CuAg) | UNS C10700
Our Products
Our Brochure
Copper Silver Alloy (CuAg) | UNS C10700 Brochure
Download
Descriptions
At Navkar Metal Syndicate, we supply Copper Silver Alloy (CuAg, UNS C10700) — a premium high-conductivity copper alloy engineered for applications that demand superior electrical performance combined with enhanced strength and wear resistance. The controlled addition of silver (typically 0.08–0.12%) significantly improves the alloy’s softening resistance at elevated temperatures, making it ideal for use in components exposed to continuous electrical loading or thermal cycling.
Copper Silver (C10700) maintains conductivity levels of over 98% IACS while offering improved mechanical strength compared to pure copper. It exhibits excellent formability, corrosion resistance, and thermal stability, ensuring reliable performance in switchgear, commutators, welding electrodes, contact tips, and high-current connectors. The combination of silver and copper results in a durable material that retains conductivity even after prolonged exposure to heat, oxidation, and mechanical stress.
All Copper Silver products from Navkar Metal Syndicate are precision processed and supplied with Mill Test Certificates (MTCs), traceable heat numbers, and export-grade packaging. Available in rods, bars, plates, strips, and custom machined components, our CuAg alloys are trusted by manufacturers and engineers worldwide for their consistency, reliability, and superior metallurgical performance.
Chemical Composition
The Copper Silver Alloy family (UNS C10700 / CuAg0.1 / CW013A) contains a controlled addition of silver to high-purity copper, enhancing mechanical strength and softening resistance while maintaining high electrical and thermal conductivity. The result is a versatile alloy suited for electrical, thermal, and mechanical applications where reliability under heat and load is essential.
| Element | C10700 (CuAg0.1) | Typical Range (% by weight) | EN / ISO Equivalent |
|---|---|---|---|
| Copper (Cu) | Balance | 99.85 – 99.90 | CW013A / CuAg0.1 |
| Silver (Ag) | 0.08 – 0.12 | 0.08 – 0.12 | |
| Oxygen (O) | ≤ 0.03 | ≤ 0.03 | |
| Impurities (each) | ≤ 0.05 | ≤ 0.05 |
Equivalent Standards: ASTM B152 (Sheet/Plate), ASTM B187 (Bar), ASTM B272 (Wire),
EN 1652 (Strip), and ISO CuAg0.1.
UNS: C10700 | EN: CW013A | ISO: CuAg0.1
Mechanical, Physical & Fabrication Properties
Copper Silver Alloy (CuAg / UNS C10700 / CW013A) combines the high electrical and thermal conductivity of pure copper with the improved strength and softening resistance provided by a small silver addition. It retains exceptional ductility and thermal stability even after prolonged exposure to elevated temperatures, making it ideal for high-temperature electrical contacts, commutators, switchgear, and welding electrodes.
| 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. |
Applications
Copper Silver Alloy (CuAg / UNS C10700 / CW013A) is valued for its unique blend of high electrical and thermal conductivity, excellent strength retention at elevated temperatures, and superior formability. These characteristics make it an ideal choice for components that must perform reliably under both mechanical and thermal stress, across a wide range of electrical, mechanical, and industrial systems.
- Electrical connectors, contact tips, and switchgear components
- Commutators, rotor bars, and resistance welding electrodes
- High-temperature electrical conductors and busbars
- Precision springs, diaphragms, and flexible current-carrying parts
- Thermal and electrical contacts in relays and circuit breakers
- Heat exchanger components and conductive cooling elements
- Aerospace and automotive electrical harnesses and contact pins
- Injection mould tooling inserts requiring thermal balance and conductivity
- Rail and power transmission connectors requiring strength and conductivity
With its combination of 98–100% IACS conductivity, strength stability up to 300°C,
and outstanding resistance to oxidation and creep, CuAg Alloy (C10700) is trusted across
aerospace, electrical, power generation, and high-performance manufacturing sectors.
Supplied by Navkar Metal Syndicate with full Mill Test Certificates (MTCs), traceable heat numbers,
and export-grade packing, our Copper Silver Alloy products deliver precision, reliability, and long-term performance.
Standards & International Equivalents:
Copper Silver Alloy (CuAg, typically CuAg0.1) is referenced across multiple global standards. The designations below cover the most common product forms supplied by Navkar Metal Syndicate.
| Alloy Name | UNS (CDA) | EN / ISO Designation | Common Trade Name | Typical Ag Content |
|---|---|---|---|---|
| Copper Silver | C10700 | CW013A / CuAg0.1 | Silver-Bearing Copper | 0.08–0.12% Ag |
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 Navkar Metal Syndicate with full traceability, mill certification, and export-grade packaging.
Common Product Forms & Dimensions
Copper Silver Alloy (C10700 / CuAg0.1 / CW013A) is supplied by Navkar Metal Syndicate 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 |
Note: Actual availability and temper conditions may vary by manufacturing process (hot rolled, cold rolled, extruded, or forged). Please contact Navkar Metal Syndicate for custom size, finish, or temper requirements.
Tell Us What You Need
30+
Years of Experience
Trusted Worldwide | Supplying Copper & Alloys to 1000+ clients
We usually respond within 24 working hours.