Screw and Barrel for Plastic Extruder Machine

Extruder Barrel and Screw Specification : Ø15mm~Ø500mm  Draw Ratio： L/D=7~55    Technical Parameter Quenching and Tempering Hardness：HB280-320 Screw Straightness：0.015mm Nitriding Hardness：HV850-1000 Nitrided Chromium Coating Surface Hardness≥900HV Nitriding Depth ：0.45~0.7mm Chromium Coating Thickness ：0.025~0.10mm Nitridng Brittleness :2 Level Duplex Alloy Hardness：HRC50-65 Surface Roughness：≤Ra0.4 Duplex Alloy Depth：0.8~2.0mm Materials and Technologies Quality 38CrMoAIA (41CrAIMo7) SKD61(H13) Quality Duplex Stainless Steel Gr12MoV 42CrMo Quality Powder Metallurgy Materials 40Cr…

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