Parallel twin screw&barrel
Specification
Φ35/Φ35—Φ250/Φ250
Ratio of length to diameter：L/D=12-50
Use top-quality 38CrMoALA or use materials according to the requirements of the user（e.g.9Cr8Mov、SKD61）
Features
38CrMoALA Nitriding treatment
Surface hardness：HV≥900
Nitriding depth：0.5-0.8mm
brittleness ≥Grade 1
Base material：38CrMoALA, Special alloy is welded on the flight of screw,prolong life of screw.
Base material：38CrMoALA, The surface of the screw arris is spray-welded with dual alloy,which can prolong the life of the screw.
