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| Property | Value |
|---|---|
| UNS Number | C11000 |
| ASTM Standard | ASTM B152 / B187 |
| Tensile Strength | 220-380 MPa |
| Yield Strength | 70-310 MPa |
| Density | 8.94 g/cm³ |
| Max Service Temp | 200°C |
| Element | Composition (%) |
|---|---|
| Cu | ≥99.9% |
| O | 0.02–0.05% |
| Pb | ≤0.005% |
| Bi | ≤0.001% |
| Sb | ≤0.002% |
Copper C11000, known as Electrolytic Tough Pitch (ETP) copper, contains a minimum of 99.90% copper with controlled oxygen content of approximately 0.02-0.04% present as cuprous oxide. This minimal oxygen level ensures excellent electrical and thermal conductivity while maintaining good ductility. The absence of significant alloying elements preserves copper’s inherent softness and malleability, allowing the material to be readily cold worked and formed into fastener shapes without cracking, while still achieving moderate strength through work hardening during manufacturing processes.
C11000 fasteners offer outstanding electrical conductivity, excellent thermal conductivity, and superior corrosion resistance in atmospheric, freshwater, and many chemical environments due to the formation of a protective oxide patina. Its high ductility enables complex forming operations, while good solderability and weldability simplify assembly processes. These properties make ETP copper fasteners ideal for electrical connections, grounding systems, busbar assemblies, and applications requiring reliable conductivity combined with dependable mechanical fastening performance.
Specifications
Copper C11000 (ETP) Fasteners deliver excellent electrical and thermal conductivity with reliable mechanical performance, corrosion resistance, and precise dimensional tolerances for demanding assemblies. Their technical specifications balance strength, ductility, and machinability across standard fastener sizes, making them suitable for electrical and general-purpose applications.
| Property | Value |
|---|---|
| Tensile Strength | 220-250 MPa |
| Yield Strength | 70-90 MPa |
| Elongation | 40-45% |
| Hardness | 40-50 HRF |
| Modulus of Elasticity | 117 GPa |
| Thermal Conductivity | 391 W/m·K |
| Coefficient of Thermal Expansion | 17.0 µm/m·°C |
| Density | 8.94 g/cm³ |
| Melting Range | 1065-1083°C |
| Maximum Service Temperature | 200°C |
| Standard Type | Details |
|---|---|
| Bolt Standard | DIN 933, ISO 4014 |
| Stud Bolt Standard | ASME B18.31.2 |
| Nut Standard | DIN 934, ISO 4032 |
| Washer Standard | DIN 125, ISO 7089 |
| Thread Form | UNC, UNF, Metric Coarse |
| Diameter Range | M3 to M36 |
| Length Range | 10mm to 300mm |
| Available Product Forms | Bolts, Nuts, Screws, Washers, Studs |
| Custom Sizes | Available on request |
| Manufacturing Standard | ASTM B152 / ASME B18.2.1 |
Applications
