The single screw is a key component in extrusion and injection molding machines. The barrel
is the housing that surrounds the screw and provides a pathway for the material to flow.
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| conventional materials | 38CrMoAIA SKD61 |
| nitriding hardness | HV900-1000 |
| nitriding depth | 0.5-0.8mm |
| quenching hardness | HRC55-62 |
| straightness of screw | 0.015mm |
| thickness of chromium plaring layer | 0.05~0.1mm |
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