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High Conductivity Copper Wires – ETP & DHP Grades
Product Overview
R V Metal Corporation supplies high-conductivity copper wires for electrical, electronics, power distribution, earthing and industrial applications where low resistance and consistent performance are critical. Manufactured primarily in ETP (C11000) and DHP (C12200) grades, our copper wires are available in soft, half-hard and hard tempers, with options such as bare, tinned and stranded constructions. We offer a wide range of diameters and packaging formats – coils, spools and drums – to suit OEMs, panel builders, transformer manufacturers, motor/alternator rewinders and cable makers who demand reliable, specification-compliant copper conductors.
Technical Specifications
| Property | Specification | Typical Values |
|---|---|---|
| Material Grade | Copper ETP (C11000) / Copper DHP (C12200) | ETP for electrical conductivity, DHP for corrosion resistance |
| Conductor Type | Bare / Tinned / Stranded / Annealed / Hard-Drawn | Single-strand or multi-strand options |
| Diameter Range | 0.20 mm – 12 mm | Custom sizes available on request |
| Temper | Soft (Annealed), Half-Hard, Hard-Drawn | Depends on electrical or mechanical requirement |
| Surface Finish | Bright / Matte / Tinned | Oxide-free, clean drawn surface |
| Electrical Conductivity | ETP: ≥ 100% IACS DHP: 85–90% IACS |
Measured at 20°C |
| Tensile Strength | Soft: 200–240 MPa Hard: 300–350 MPa |
Varies by temper & wire diameter |
| Elongation | Soft: 25% min. Hard: 1–3% |
Higher elongation for annealed wires |
| Resistance per Meter | As per ASTM B258 / IS 10810 | Depends on diameter & material purity |
| Packaging | Plastic Spools, Wooden Reels, Coils (10–50 kg) | Export-grade wrapping available |
| Applicable Standards | ASTM B3, ASTM B33, ASTM B170, IS 1897 | Meets global electrical conductor norms |
Chemical Composition
| Element | Copper ETP (C11000) | Copper DHP (C12200) | Remarks |
|---|---|---|---|
| Copper (Cu) | 99.90% min | 99.90% min | Base metal — high purity ensures conductivity & ductility |
| Oxygen (O) | 0.02 – 0.04% | < 0.02% (Deoxidized with Phosphorus) | ETP contains oxygen; DHP is low-oxygen for brazing applications |
| Phosphorus (P) | Nil | 0.015 – 0.040% | Improves corrosion & hydrogen embrittlement resistance |
| Lead (Pb) | < 0.005% | < 0.005% | Controlled as per ASTM / IS limits |
| Iron (Fe) | < 0.005% | < 0.005% | Impurity control for electrical performance |
| Other Impurities | Total < 0.03% | Total < 0.03% | Ensures consistency & conductivity integrity |
| Conductivity (IACS %) | ≥ 100% IACS | 85 – 90% IACS | ETP is the global standard for electrical applications |
UNS Codes & Grades
| UNS Code | Grade Name | Common Designation | Typical Application |
|---|---|---|---|
| C11000 | Electrolytic Tough Pitch Copper (ETP) | ETP Copper, Pure Copper Wire | Electrical wiring, power cables, busbars, earthing conductors |
| C12200 | Phosphorus-Deoxidized Copper (DHP) | DHP Copper, Deoxidized Copper Wire | HVAC coils, refrigeration capillaries, plumbing, bending applications |
| C10200 | Oxygen-Free Copper (OFHC) | OFHC Copper Wire | Electronics, instrument wiring, high-conductivity applications |
| C10700 | Oxygen-Free Copper with Phosphorus | OFXLP | Vacuum tube welding, high-temperature electrical components |
| C12000 | Phosphorized Low Residual Copper | Low Oxygen Copper | Brazing, soldering applications, HVAC fittings |
| C14500 | Tellurium Copper | Free-Machining Copper | Electrical switchgear, contacts, precision machined components |
Mechanical, Physical & Fabrication Properties
| Property | C11000 (ETP Copper) | C12200 (DHP Copper) | C10200 (OFHC Copper) |
|---|---|---|---|
| Electrical Conductivity (% IACS) | 101% IACS | 85–90% IACS | 101–102% IACS |
| Thermal Conductivity (W/m·K) | 390 | 330 | 400 |
| Tensile Strength (Annealed) | 200–250 MPa | 220–260 MPa | 200–240 MPa |
| Tensile Strength (Hard Drawn) | 300–380 MPa | 320–400 MPa | 300–380 MPa |
| Elongation (%) | 25–45% | 30–45% | 30–50% |
| Hardness (HV) | 45–85 HV | 50–90 HV | 40–80 HV |
| Melting Point (°C) | 1083°C | 1080–1083°C | 1083°C |
| Ductility | High | Very High | Extremely High |
| Bendability | Good | Excellent | Excellent |
| Brazing / Soldering | Excellent | Excellent | Excellent |
| Corrosion Resistance | Very Good | Excellent (Deoxidized) | Excellent |
| Hydrogen Embrittlement Risk | Yes (ETP is sensitive) | No | No |
| Weldability | Good | Very Good | Excellent |
| Typical Tempers | Soft (O), Half-hard (H02), Hard (H04) | Soft (O60), Hard (H80) | Soft (O), Hard (H04) |
Common Names & International Identifiers
| Grade | Common Names | International Identifiers | Industry Usage Names |
|---|---|---|---|
| C11000 (ETP Copper) |
Electrolytic Tough Pitch Copper ETP Copper Wire 99.9% Pure Copper Wire |
ASTM B3, B1 EN CW004A JIS C1100 ISO Cu-ETP |
Winding Wire Earthing Wire Bus Wire / Power Cable Conductor |
| C12200 (DHP Copper) |
Deoxidized High Phosphorus Copper Wire DHP Copper Wire |
ASTM B68 / B75 EN CW024A JIS C1220 ISO Cu-DHP |
HVAC Copper Wire Forming Wire Plumbing & Industrial Service Wire |
| C10200 (OFHC Copper) |
Oxygen-Free High Conductivity Copper Wire OFHC Copper Wire 4N (99.99%) Copper |
ASTM B170 EN CW009A JIS C1020 ISO Cu-OF |
High-Purity Electrical Wire Audio Grade Wire Semiconductor Manufacturing Wire |
| C10300 (OF Copper – Phosphorus Deoxidized) |
OFE Copper Wire Oxygen-Free Electronic Grade Copper |
ASTM B170 EN CW008A ISO Cu-OFE |
Vacuum Tube Components High-End Electronics Aerospace Wiring |
| EC Grade Copper (Electrolytic Copper) |
Electrical Conductor Grade Copper EC Grade Wire |
IEC 60228 Class 1/2/5 IS 8130 Cu-ETP |
Power Cables Control Cables Automotive Wiring |
Standards & International Equivalents
| Standard / Specification | Region / Authority | Description / Applicability | Relevant Copper Wire Grades |
|---|---|---|---|
| ASTM B3 | USA | Soft or annealed electrolytic copper wire for electrical conductors. | C11000 (ETP) |
| ASTM B1 | USA | Hard drawn copper wire for electrical purposes. | C11000 (ETP) |
| ASTM B170 | USA | Oxygen-free copper (OF & OFE) wire for high conductivity applications. | C10200 / C10300 |
| EN 13602 | Europe | Copper and copper alloys — Drawn, round copper wire for electrical purposes. | CW004A (Cu-ETP), CW008A (Cu-OFE) |
| EN 1976 | Europe | Refined copper grade specifications, applicable for copper rod used in wire drawing. | CW004A |
| IEC 60228 | International | Conductors of insulated cables, defining Class 1/2/5 copper wire sizes and resistivity. | EC Grade, Cu-ETP |
| IS 8130 | India | Copper wire for electrical cables and flexible conductors. | EC Grade, Cu-ETP |
| JIS H3300 | Japan | Copper and copper alloy wires for electrical and electronic industries. | C1100, C1020 |
| ISO 1634 | International | Mechanical properties and tolerances for copper wire. | Cu-ETP, Cu-DHP, Cu-OF |
| BS 4109 | UK | Specification for copper rod, wire, and bar for electrical purposes. | C101 / Cu-ETP |
Applications
| Application Category | Description / Usage | Suitable Copper Grades |
|---|---|---|
| Electrical Power Cables | Used as conductors in LT/HT power cables due to high conductivity and excellent flexibility. | ETP (C11000), EC Grade |
| Winding Wires | Used for motor windings, transformers, alternators, and electromagnetic coils. | ETP (C11000), OFC (C10200) |
| Earthing & Grounding Systems | Provides safe discharge path for electrical faults and lightning systems. | ETP (C11000), DHP (C12200) |
| Automotive Wiring Harness | Used in vehicles for battery cables, engine wiring, ECU connections & sensor circuits. | ETP (C11000) |
| Electronics & PCB Applications | Used in precision electronic components, connectors, PCB tracks & high-frequency circuits. | OFC (C10200), ETP (C11000) |
| Telecommunication Cables | Used in signal transmission lines, coaxial cables, and telephone wiring networks. | ETP (C11000) |
| Construction & Building Wiring | Used for domestic, commercial and industrial electrical distribution networks. | EC Grade, ETP (C11000) |
| Control & Instrumentation | Used for automation wiring, PLC panels, control systems & low-voltage signal circuits. | ETP (C11000) |
| Braided Copper Wire & Flexible Connectors | Used in switchgear, busbars, earthing braids, battery connectors and flexible shunts. | ETP (C11000), DHP (C12200) |
| Solar & Renewable Energy Systems | Used in PV cable assemblies, grounding networks, inverters & battery storage links. | ETP (C11000) |
| Magnet Wire (Enamelled) | Used in compressors, pumps, fans, relays & micro-motors for HVAC and automotive. | ETP (C11000), OFC (C10200) |
Standard Copper Wires Dimensional Chart
| Gauge | Diameter (mm) | Cross-Sectional Area (mm²) | Theoretical Weight (kg/km) | Resistance at 20°C (Ω/km) | Suitable Copper Grades |
|---|---|---|---|---|---|
| SWG 20 / AWG 24 | 0.559 | 0.245 | 2.19 | 72.1 | C11000 (ETP), C10200 (OFC) |
| SWG 18 / AWG 22 | 0.914 | 0.653 | 5.83 | 27.5 | C11000, C10200 |
| SWG 16 / AWG 20 | 1.219 | 1.165 | 10.40 | 15.3 | C11000 |
| SWG 14 / AWG 18 | 1.626 | 2.073 | 18.50 | 8.9 | C11000 |
| SWG 12 / AWG 16 | 2.032 | 3.247 | 29.00 | 5.7 | C11000 / EC Grade |
| SWG 10 / AWG 14 | 3.251 | 8.285 | 73.90 | 2.2 | ETP / OFC |
| SWG 8 / AWG 12 | 4.064 | 12.96 | 115.60 | 1.3 | ETP, EC Grade |
| SWG 6 / AWG 10 | 4.877 | 18.58 | 165.80 | 0.86 | ETP |
| SWG 4 / AWG 8 | 6.401 | 32.17 | 287.00 | 0.50 | ETP / DHP (for earthing) |
| SWG 2 / AWG 6 | 7.620 | 45.60 | 406.50 | 0.35 | ETP |
| SWG 0 / AWG 4 | 8.839 | 61.28 | 546.80 | 0.26 | ETP / OFC (High conductivity) |
Important Technical Notes:
- Resistance values follow IEC 60228 high-conductivity copper standards.
- Theoretical weights are calculated using copper density of 8.89 g/cm³.
- C11000 (ETP) offers the best electrical conductivity and is widely used in power applications.
- C10200 (OFC) is ultra-pure oxygen-free copper, ideal for electronics, EV components, and audio systems.
- C12200 (DHP) should NOT be used for electrical applications except earthing, due to lower conductivity.
- For precision winding or high-flex cables, multi-strand configurations significantly reduce bending radius.
| Stranding (No. of Strands × Dia) | Total Area (mm²) | Equivalent Gauge | Theoretical Weight (kg/km) | Applications |
|---|---|---|---|---|
| 7 × 0.30 mm | 0.49 | ~AWG 24 | 4.36 | Electronics, Signal, Control Wires |
| 7 × 0.50 mm | 1.37 | ~AWG 18 | 12.20 | Auto Harness, Low Voltage Wiring |
| 19 × 0.30 mm | 1.34 | ~AWG 18 | 12.00 | Flexible Power, Solar Cables |
| 19 × 0.40 mm | 2.39 | ~AWG 14 | 21.40 | Automotive, EV Signal, Robotics |
| 37 × 0.40 mm | 4.64 | ~AWG 10 | 41.50 | High-Flex Welding Cables, Battery Packs |
| 61 × 0.50 mm | 12.00 | ~AWG 6 | 107.00 | Marine, Battery Terminals, Earthing |
| 105 × 0.40 mm | 13.20 | ~AWG 6 | 118.00 | Ultra-Flex Class 6 Cables |
| Gauge (AWG/SWG) | Diameter (mm) | Area (mm²) | Resistance (Ω/m) | Resistance (Ω/km) | Typical Uses |
|---|---|---|---|---|---|
| AWG 24 / SWG 20 | 0.56 | 0.205 | 0.0722 | 72.2 | Signal Wiring, Electronics |
| AWG 22 / SWG 19 | 0.64 | 0.326 | 0.053 | 53.0 | Automotive, Sensors |
| AWG 20 / SWG 18 | 0.81 | 0.518 | 0.0339 | 33.9 | General Wiring |
| AWG 18 / SWG 16 | 1.02 | 0.823 | 0.0214 | 21.4 | Control Panels, Power Electronics |
| AWG 16 / SWG 14 | 1.29 | 1.31 | 0.0136 | 13.6 | Lighting, Industrial Wiring |
| AWG 14 / SWG 12 | 1.63 | 2.08 | 0.0086 | 8.6 | House Wiring, Power Lines |
| AWG 12 / SWG 10 | 2.05 | 3.31 | 0.0053 | 5.3 | High-Power Cables |
| AWG 10 / SWG 8 | 2.59 | 5.26 | 0.0033 | 3.3 | Motors, Transformers, Earthing |
| AWG 8 / SWG 6 | 3.26 | 8.37 | 0.0021 | 2.1 | Battery Cables, Heavy Loads |
| AWG 6 / SWG 4 | 4.11 | 13.30 | 0.0013 | 1.3 | Industrial Power, Solar |
| AWG 4 / SWG 2 | 5.19 | 21.10 | 0.00082 | 0.82 | Large Panels, Power Plants |
| AWG 2 / SWG 0 | 6.54 | 33.60 | 0.00052 | 0.52 | Transformers, Generators |
| AWG | SWG | Diameter (mm) | Cross-Section Area (mm²) | Resistance (Ω/km) | Typical Application |
|---|---|---|---|---|---|
| 30 | 28 | 0.255 | 0.051 | 345 | Sensors, instrumentation |
| 28 | 26 | 0.321 | 0.081 | 214 | Signal wiring |
| 26 | 24 | 0.405 | 0.129 | 138 | Control cables |
| 24 | 22 | 0.511 | 0.205 | 85 | Automotive low-current |
| 22 | 21 | 0.644 | 0.326 | 53 | Relay & ECU wiring |
| 20 | 20 | 0.812 | 0.518 | 33.9 | General wiring |
| 18 | 18 | 1.024 | 0.823 | 21.4 | HVAC, automotive harness |
| 16 | 16 | 1.291 | 1.31 | 13.6 | Power cables |
| 14 | 14 | 1.628 | 2.08 | 8.6 | Panels, chargers |
| 12 | 12 | 2.053 | 3.31 | 5.3 | Motors, heavy-duty wiring |
| 10 | 10 | 2.588 | 5.26 | 3.3 | Inverters, battery wiring |
| 8 | 8 | 3.264 | 8.37 | 2.1 | High-current DC |
| 6 | 6 | 4.115 | 13.3 | 1.3 | EV cables, industrial power |
| 4 | 4 | 5.189 | 21.15 | 0.82 | Battery packs, energy storage |
| 2 | 2 | 6.544 | 33.62 | 0.52 | EV fast charging cables |
| 0 (1/0) | 0 | 8.251 | 53.5 | 0.33 | Traction motors, DC bus bars |
| EV Cable Grade | Voltage Class | Conductor Type | Insulation | Temperature Rating | Flexibility Class | Applications |
|---|---|---|---|---|---|---|
| EV-C1 (Low Voltage) | 60V – 110V | C11000 ETP / C10200 OFC | PVC / PE | –20°C to +90°C | Class 5 | Auxiliary Systems, Sensors, BMS wiring |
| EV-C2 (High Voltage) | 600V – 1000V | C11000 ETP | XLPE / TPE | –40°C to +125°C | Class 6 | High-voltage battery to inverter |
| EV-C3 (Fast Charging Grade) | 1000V – 1500V | C10200 OFC | Silicone XLPE | –60°C to +180°C | Ultra-Flex Class 6 | DC Fast Chargers, Ultra-Rapid Charging |
| EV-T1 (Traction Motor Cable) | 600V – 1800V | C11000 ETP | Silicone / FEP | –55°C to +200°C | High Flex | Traction Motor → Inverter |
| EV-B1 (Battery Interconnect Grade) | 48V – 800V | OFC / C11000 | XLPE / TPE | –30°C to +125°C | Class 5 | Battery Modules, Busbars, Jumpers |
| EV-W1 (Welding / Charging Flex Cable) | Up to 1000V | Fine OFC Strands | EPDM / Neoprene | –40°C to +105°C | Ultra-Flex Class 6 | Charging Guns, Portable Chargers |
