Table 3.
Physical and mechanical properties of 3D printed CoCr (after stress relief) provided by their manufacturers after heat treatment. NA: Not available. Data from Reference [19].
| Property | OS SP2 | EOS MP1 |
Renisaw DG1 |
SLM MediDent |
SLM CoCr28Mo6 | LaserForm CoCr (B) |
Concept Laser Remanium Star CL |
BEGO Wirobond C+ |
Scheftner Starbond COS | Scheftner Starbond Easy 30 |
|---|---|---|---|---|---|---|---|---|---|---|
| Density (g/cm3) | 8.5 | 8.3 | 8.3 | NA | NA | 8.3 | 8.6 | 8.6 | 8.8 | 8.5 |
| Tensile strength (MPa) | 1350 | 1100 | 1076 | 1415 | 1215 | 1445 +/− 50 | 1030 | 1315 | 990–1250 | 1090 |
| Elongation at break (%) | 3 | Min. 20 | 2.7 | 4 | 21 | 34 +/− 6 | 10 | 2–10 | 15 | |
| Young’s Modulus (GPa) | approx. 200 | 200 | 224 | 245 | 205 | 230 +/− 40 | 230 | 215 | 195–200 | 225 |
| Hardness | 420 HV | approx. 35–45 HRC | 430 HV | NA/375 HV as built | 385 HV | 26 +/− 5 Rockwell C | NA | NA | 345–490 HV 10 | 425 HV 10 |
| Coefficient of thermal expansion | 14.3 × 10−6 m/m °C | 13.6 × 10−6 m/m °C–15.1 × 10−6 m/m °C | 14.1 | NA | NA | 14 | 14.1 (500 °C) | 14.3 (RT-500 °C) 14.5 (RT-600 °C) |
14.4 (600 °C) | 14.5 (500 °C) 14.7(600 °C) |
| Melting interval (°C) | 1410–1450 | 1350–1430 | 1375–1405 | NA | NA | 1350–1430 | 1320–1420 | 1380–1420 | 1305–1400 | 1310–1410 |