Haihe Machinery

Screw Base Material: Dual-alloy 38CrMoAlA
Barrel Base Materials: 40Cr, 42CrMo, 38CrMoAlA

Alloy Composition Options:
Wear-Resistant: Fe + Ni + Cr + B
Corrosion-Resistant: Ni + Cr + Co + B
High Wear & Corrosion Resistance: Ni + Cr + WC + Co + B

Diameter: Φ20 – Φ300 mm
L/D Ratio: 1:18 – 1:55
Material: High-quality 38CrMoAlA nitriding steel, nitriding hardness HV 850 – 1000, nitriding layer depth 0.5 – 0.7 mm.
Optional Bimetal: Can be selected per customer requirements, alloy layer depth 1 – 2 mm, hardness HRC 56 – 65.

Primarily used for extrusion of:
Sheets & Plates
Pellets / Granules
Films
Pipes & Tubes
Profiles / Custom Shapes
Specifications:
Diameter: Φ30 – Φ300 mm
L/D Ratio: 1:25 – 1:45

Equipped with specialized screws, suitable for PVC, PE, PBT, PA6, low-smoke halogen-free (LSZH), fluoroplastics, XLPE cross-linked production lines, and coaxial physical foaming insulation.