When the spec calls for the highest electrical or thermal conductivity, C110 is the answer — 99.9% pure copper with ~100% IACS electrical conductivity. The trade-off is brutal machinability: the material is gummy, work-hardens rapidly, and builds up on tool edges. Used wherever current-carrying capacity or heat-flux density exceeds the capability of brasses.
100% IACS — the industry reference. Bus bars, high-current terminals, welding electrodes.
391 W/m·K (5× aluminum, 20× stainless). Heat sinks in high-power electronics, heat exchangers.
Excellent for bent, stamped, or drawn bus components before machining.
| Element | Content |
|---|---|
| Copper | 99.90% min |
| Oxygen | 0.02–0.04% |
| Silver (max) | 0.08% |
Composition per ASTM B187. Specific mill test reports (MTR) available on request for production orders.
Dull tools produce torn surfaces and burrs. Use honed, polished carbide with 15–20° positive rake. Never use worn tooling.
ETP copper cannot be brazed or heated above ~370 °C in reducing (H₂) atmosphere — specify OFHC (C101) if hydrogen exposure is expected.
Tapped holes in copper strip easily. Use plug taps, thread-forming (fluteless) taps, or thread inserts for critical fasteners.
Full DFM review by a mechanical engineer. No automated bot rejection. FOB Ningbo or DDP to your door.