C11000 ETP Copper: Properties, Applications & Global Supply Guide
Electrolytic Tough Pitch (ETP) Copper, designated as C11000 under the UNS system, is the most widely used copper grade in the world, accounting for approximately 80% of all refined copper consumption. Its combination of high electrical conductivity (100% IACS minimum), excellent formability, and cost-effectiveness makes it the default choice for electrical, construction, and industrial applications.
What Is C11000 ETP Copper?
C11000 copper is refined through an electrolytic process that achieves a minimum purity of 99.90% copper. The “tough pitch” designation refers to the controlled oxygen content (0.02-0.04%) that enhances the metal’s structure and workability. Unlike oxygen-free grades, ETP copper contains fine copper oxide particles that act as grain refiners during hot working, improving mechanical properties without significantly compromising electrical performance.
Key Properties of C11000 Copper
| Property | Value |
|---|---|
| Purity (minimum) | 99.90% Cu |
| Electrical Conductivity | 100% IACS minimum |
| Electrical Resistivity | 1.7241 µΩ·cm at 20°C |
| Thermal Conductivity | 388 W/m·K |
| Tensile Strength (annealed) | 200-250 MPa |
| Yield Strength (annealed) | 70-100 MPa |
| Elongation | 45-55% |
| Density | 8.94 g/cm³ |
| Melting Point | 1083°C |
Applications of C11000 ETP Copper
Electrical and Electronics
Bus bars, switchgear components, electrical connectors, transformer windings, and motor windings benefit from C11000’s excellent conductivity and formability.
Construction and Architecture
Roofing, flashing, gutters, downspouts, and architectural cladding take advantage of copper’s corrosion resistance and aesthetic appeal.
Plumbing and HVAC
Water pipes, fittings, heat exchanger tubes, and refrigeration components rely on C11000’s corrosion resistance and thermal conductivity. However, C12200 (DHP) is often preferred for welding applications.
Industrial Manufacturing
Gaskets, stampings, chemical processing equipment, and anodes for electroplating are common industrial uses.
C11000 vs Other Copper Grades
| Grade | Purity | Conductivity | Best For |
|---|---|---|---|
| C11000 ETP | 99.90% | 100% IACS | General electrical, construction, standard applications |
| C10100 OFE | 99.99% | 101% IACS | Semiconductor, cryogenic, ultra-high reliability |
| C10200 OF | 99.95% | 100% IACS | High-vacuum, microwave components |
| C12200 DHP | 99.90% | 85% IACS | Welded tubes, plumbing, heat exchangers |
Sourcing C11000 from Core Metal Steel
Core Metal Steel supplies C11000 ETP copper in sheet, plate, coil, strip, rod, bar, tube, and wire forms, meeting ASTM B1, B2, B3, B42, B43, B88, B111, B133, B152, B187, B280, and B370 standards. All shipments include certified MTC documentation per EN 10204 3.1.
Contact our team for competitive C11000 pricing: Request Quote