Technical Data
| Item | Specification |
|---|---|
| Product Name | Nitrided Screw & Barrel |
| Material | 38CrMoAlA (JIS SACM645), 42CrMo, SKD61 (Optional) |
| Nitriding Method | Gas Nitriding |
| Surface Hardness | HV 900–1100 (≈ HRC 65–70) |
| Nitrided Layer Depth | 0.50–0.80 mm |
| Surface Brittleness Grade | ≤ Grade II |
| Surface Roughness | Ra ≤ 0.4 μm |
| Straightness | ≤0.015 mm/m |
| Screw Diameter | Ø15–Ø300 mm |
| Maximum Length | Up to 10,000 mm |
| Core Hardness | HB 260–300 |
| Heat Treatment | Quenching & Tempering + Gas Nitriding |
| Wear Resistance | Excellent |
| Corrosion Resistance | Good |
| Service Life | 2–3 times longer than standard screw barrel |
Chemical Composition of 38CrMoAlA
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.35–0.42 |
| Silicon (Si) | 0.20–0.45 |
| Manganese (Mn) | 0.30–0.60 |
| Chromium (Cr) | 1.35–1.65 |
| Molybdenum (Mo) | 0.15–0.25 |
| Aluminum (Al) | 0.70–1.10 |
Compatible Machines
- Injection Molding Machines
- Single Screw Extruders
- Twin Screw Extruders
- Blow Molding Machines
- Rubber Extruders
- Pipe & Profile Extrusion Lines
Suitable Materials
- PP
- PE
- HDPE
- LLDPE
- LDPE
- PVC
- ABS
- PS
- PA
- PET
- PC
- PMMA
- TPU
- TPE
- EVA
- Rubber Compounds
Features
- High surface hardness up to HV900–1100
- Superior wear resistance for long production cycles
- Improved corrosion resistance against common plastics
- Excellent dimensional stability after nitriding
- Precision machining for smooth plasticizing performance
- Suitable for continuous high-speed production
- OEM & customized sizes available
- Compatible with most international machine brands
Manufacturing Process
Forging → Rough Machining → Quenching & Tempering → Finish Machining → Gas Nitriding → Precision Grinding → Polishing → Quality Inspection → Packing
Available Applications
- Plastic Injection Molding
- Plastic Extrusion
- Pipe Extrusion
- Film Extrusion
- Sheet Extrusion
- Cable Extrusion
- Recycling Equipment
- Rubber Processing Equipment