Your nozzle is the last and final step in your extrusion system, and maybe the most important part of your 3D printer. Plastic flows through the small orifice, thanks to the pressure generated by the extruder pinch system. This high flow can reach a pressure as high as 250 times the atmospheric pressure (25 MPa).
Comparison of Nozzle material of carbide Nozzle for 3 Dimensional Printer
| Material | Thermal Conductivity (the higher,the better) |
Expansion coefficiant (the lower,the better) |
Hardness(Mohs) (the higher,the btter) |
Cost |
| Brass | 120 | 18.5 | 2.5 to 4.0 | low |
| SS | 20 | 8.0 | 5.0 to 7.0 | low |
| Tungsten carbide | 167 | 4.5 | 6.0 to 8.5 | medium |
| sapphires | 42 | 5.3 | 8.5 to 9.0 | high |
| Diamonds | 2300 | 1.0 | 10 | high |
| Titanium | 22 | 8.6 | 5.5 to 6.0 | high |
