

High Conductivity (OFHC) Copper characteristics are high ductility, high electrical and thermal conductivity, high impact strength, good creep resistance, ease of welding, and low volatility under high vacuum.

| Copper Wire - Detailed Technical Specifications | |||
| Common Copper Wire Types and Classifications | |||
| Wire Type | Designation | Standard | Key Characteristics |
| Single Wire Copper | 99.99% Pure Cu | ASTM B1, B2, B3 | Bare, solid, single copper strand conductor; high conductivity; 100% copper core |
| Hard Drawn Copper Wire | HDC | ASTM B1 | High tensile strength; minimal ductility; high electrical conductivity |
| Medium Hard Drawn Copper | MHDC | ASTM B1 | Moderate tensile strength and elongation |
| Annealed Copper Wire | Soft Drawn | ASTM B3 | Maximum ductility; low tensile strength; excellent bendability |
| Tin-Coated Copper Wire | Tinned Cu | ASTM B33 | Copper core with tin coating; excellent corrosion resistance; good solderability |
| Silver-Coated Copper Wire | Ag-Cu | ASTM B298 | Copper core with silver coating; excellent high-frequency performance; corrosion resistant |
| Nickel-Coated Copper Wire | Ni-Cu | ASTM B355 | Copper core with nickel coating; high temperature resistance; oxidation resistant |
| Enameled Copper Wire | Magnet Wire | IEC 60317 | Copper with insulating enamel coating; self-bonding; various temperature classes |
| Electrical Properties of Copper Wire | |||
| Property | Hard-Drawn Copper | Medium-Hard Drawn | Annealed Copper |
| Electrical Conductivity (% IACS) | 97.0 min. | 97.5 min. | 100.0 min. |
| Resistivity (Ω·mm²/m) at 20°C | 0.01777 | 0.01758 | 0.017241 |
| Resistivity (Ω·m) at 20°C | 1.770×10⁻⁸ | / | 1.724×10⁻⁸ |
| Temperature Coefficient of Resistance (K⁻¹) | 0.0039 | / | 0.00393 |
| Specific Heat (J/g·K) | 0.385 | / | 0.385 |
| Delivery Specifications - Copper Wire Coils | |||
| Parameter | Specification | Notes | |
| Coil Weight | 50 – 250 kg | Standard for drawn wire | |
| Coil Weight | 10 – 50 kg | For fine and ultra-fine wire | |
| Spool/Carrier | Spools, reels, coils | Various material types available | |
| Core Size | Customized | Matches customer winding equipment | |
| Packaging | Wrapped, palletized | Protect from moisture and mechanical damage | |
| Length per Weight | Varies | Dependent on wire diameter | |


