All hard screw series
Brief introduction:
The fully hardened SCREW IS DEVELOPED TO overcome the rapid failure of the screw in the harsh working conditions of super wear and high corrosion plastic. The tool steels with different properties are selected to obtain the wear and corrosion resistance of the screw comprehensively through the efficient and stable heat treatment process, and exponentially extend the service life of the screw.
| The name of the feature | YDT2 | YDT3 | YDT1 |
| Partial hardness of screw edge（HRC） | 56-60 | 58-62 | 56-60 |
| Wear resistance | Optimal | Good | Optimal |
| Corrosion resistance | Good | Optimal | Good |
| Temperature range（℃） | ≤400 | ≤450 | ≤400 |
| Applicable resin types | Small viscosity resin, thermosetting resin, bakelite, and engineering plastics with less than 35% glass fiber | Little viscosity, corrosion resistance and wear resistant resin | Less viscous, wear resistant resin |
| General purpose resins and engineering resins containing less than 50% glass fiber, as well as special engineering plastics | General purpose resins and engineering resins containing less than 25% glass fiber | ||
| Treatment process | The overall quenching | The overall quenching | The overall quenching |
| (With chrome plating and coating) | Coating | Chrome plated |
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