Lan
Diameter：Ф16-Ф300
Length/Diameter Ratio：L/D=15-40
Technical Indexes
1 Commonly used materials:38crMoAIA，nitriding treatment，surface hardness。HV≥900 Depth of nitration case：0.5-0.8mm
2 Commonly used materials:Surface WC/CO overall spray welding, can effectively improve the service life of the screw.
| Material： | 38CrMoALA,9Cr18MoV |
| Application area | PVC,ABS,TPO |
| Hardness After Hardening &Tempering:: | HB240 -280 |
| Nitriding Hardness: | Hv850-1000 |
| Nitrided Depth: | 0.45-0.7mm |
| Nitriding Brittleness: | Grade 2 |
| Surface Roughness: | Ra0.4 |
| Screw Straightness: | 0.015mm |
Screw type：
Gradual , saltain, wave, screen, double screen,taper,distribntary,saparating, exausting dowel,mixed smelting,double screws,three screws,more screws,granulating etc.
