| Application | Blow molding machine |
| Hardening hardness | HB280-320 |
| Nitrided Hardness | HV900-1000 |
| Nitriding Depth | 0.5-0.8MM |
| Nitrided Brittle | Less than Grade 2 |
| Surface roughness | Ra 0.4 |
| Screw straightness | 0.015MM |
| Alloy hardness | HRC 55-65 |
Types of screw:
Gradual type, mutant type, wave type, barrier type, double screen type, shunt type, separation type, exhaust type, pin type, mixed type, double-head type, three-head type, multi head type etc.
Diameter | 15-350mm | MOQ | 1 Set | |
Materials | 38CrMoAIA | Technological Parameter  | Roughness | Ra 0.4um |
42CrMo(JIS SCM440) | Hardness of Quenching and Tempering | HB 240-280 | ||
9Cr18MoV | Depth of Nitride Layer | 0.5~0.8mm | ||
CW6Mo5Cr4V2 | Hardness of Nitride | HV 980-1080 | ||
SKD11,61 | Alignment of Screw | 0.015mm | ||
GH113,and etc. | Depth of Alloy Layer | 1.5~3.5mm | ||
Technical Process | 1.Rough Machining | |||
2.Frenquency Quenching and Tempering | ||||
3.Finish Machining | ||||
4.Gas Nitriding | ||||
5.Spraying and welding with alloy power | ||||
6.Screw polishing |
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