| Clase | Composición química (% en peso) | Densidad | Dureza | Resistividad | SIGC | Resistencia a la flexión | ||
| Cu | Impurezas totales≤ | W. | g/cm3 ≥ | HB Kgf/mm2 ≥ | μΩ.cm ≤ | % ≥ | MPa ≥ | |
| W50/Cu50 | 50±2,0 | 0.5 | Balance | 11.85 | 115 | 3.2 | 54 | -- |
| W55/Cu45 | 45±2,0 | 0.5 | Balance | 12.30 | 125 | 3.5 | 49 | -- |
| W60/Cu40 | 40±2,0 | 0.5 | Balance | 12.75 | 140 | 3.7 | 47 | -- |
| W65/Cu35 | 35±2,0 | 0.5 | Balance | 13.30 | 155 | 3.9 | 44 | -- |
| W70/Cu30 | 30±2,0 | 0.5 | Balance | 13.80 | 175 | 4.1 | 42 | 790 |
| W75/Cu25 | 25±2,0 | 0.5 | Balance | 14.50 | 195 | 4.5 | 38 | 885 |
| W80/Cu20 | 20±2,0 | 0.5 | Balance | 15.15 | 220 | 5.0 | 34 | 980 |
| W85/Cu15 | 15±2,0 | 0.5 | Balance | 15.90 | 240 | 5.7 | 30 | 1080 |
| W90/Cu10 | 10±2,0 | 0.5 | Balance | 16.75 | 260 | 6.5 | 27 | 1160 |
