NISSEI FN5000 Screw And Barrel Assembly
Technical Specifications
| Component |
Material |
Main Alloy Composition |
Heat Treatment Process |
Hardness |
Surface Treatment |
Key Features |
| Screw |
KTL-202B All-Hard Alloy |
Cr 8.2%, V 1.2%, Mo 2%, Co 1% |
- Quenching: 1020–1050°C- Tempering: 550–570°C (≥3 times)- Tail annealed at high temperature |
HRC 60 ± 2 |
Titanium coating |
- Improved wear resistance- Enhanced surface hardness- Cost-effective for general applications |
| Screw Tip Assembly |
KTL-202B All-Hard Alloy |
Cr 8.2%, V 1.2%, Mo 2%, Co 1% |
- Quenching: 1020–1050°C- Tempering: 550–570°C (≥3 times)- Tail annealed at high temperature |
HRC 60 ± 2 |
Titanium coating |
- Consistent wear resistance- Better surface protection- Reliable performance |
| Barrel |
KTL-ST30 Double Alloy (Fe-Ni Base) |
Inner alloy: Fe, Ni, Cr, C, Co, B |
— |
Base: HRC 26–28Inner layer: HRC 59–61 |
— |
- Double alloy structure- Good wear & corrosion resistance- Low thermal expansion- Stable under high temperature |
| Head (Flange) |
Alloy Steel (Red Cross Grade) |
— |
Quenching and tempering |
Base: HRC 30–32Cr layer: HRC 62–64 |
Chromium plating (0.05–0.08 mm) |
- Enhanced surface wear resistance- Corrosion protection- Good structural strength |
| Nozzle |
SKD61 |
— |
- Quenching: 1020–1050°C- Tempering: 550–570°C (≥2 times) |
HRC 50 ± 2 |
— |
- Good thermal fatigue resistance- Stable performance under high temperature |