| spare parts type | screw barrel | material | other |
| machinery test report | Provided | video outgoing-inspection | Provided |
| key selling points | Long Service Life | Weight (KG) | 1000 |
| Screw name | Bimetallic screw barrel | Characteristics | WEAR RESISTANCE AND ANTI-CORROSION |
| Based material | 38Crmoala,SKD61,DC53 | depth of nitration | 0.5-0.8mm |
| hardness of nitration | 950-1020Hv | Depth of alloy layer | 2-3mm |
| hardness of alloy | HRC58-62 | Linearity of screw | 0.015mm |
| roughness of surface | Ra 0.4um | Fragility of nitration | less than grade 1 |