Brass C360 is dramatically easier to machine (100 vs 20 rating) and is the clear choice for complex turned parts. Copper is the choice when maximum electrical/thermal conductivity is the primary requirement.
| Property | Brass C360 (Free-Cutting Brass) | Copper C110 (ETP Copper) |
|---|---|---|
| Tensile Strength | 385 MPa (56 ksi) | 220 MPa (32 ksi) |
| Yield Strength | 310 MPa (45 ksi) | 69 MPa (10 ksi) |
| Hardness | 78 HRB | 45 HRF |
| Density | 8.49 g/cm³ | 8.94 g/cm³ |
| Machinability Rating | 100/100 | 20/100 |
| Thermal Conductivity | 115 W/m·K | 388 W/m·K |
| Melting Point | 885–900 °C | 1,083 °C |
| Tolerance | ±0.005 mm | ±0.01 mm |
| Property | Brass C360 (Free-Cutting Brass) | Copper C110 (ETP Copper) | Winner |
|---|---|---|---|
| Machinability | 100/100 | 20/100 | Brass |
| Electrical Conductivity | 26% IACS | 101% IACS | Copper |
| Thermal Conductivity | 115 W/m·K | 388 W/m·K | Copper |
| Tensile Strength | 385 MPa | 220 MPa | Brass |
| Surface Finish Quality | Excellent | Good (gummy) | Brass |
| Cost | ~$3/lb | ~$5/lb | Brass |
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