Parallel twin screw and barrel Specification: Φ45/2, Φ60/2, Φ65/2, Φ70/2, Φ72/2, Φ75/2, Φ80/2, Φ85/2, Φ90/2, Φ93/2, Φ100/2, Φ105/2, Φ110/2, Φ115/2, Φ120/2, Φ125/2, Φ130/2, Φ140/2, Φ150/2, Φ160/2, Φ170/2, Φ180/2, Φ190/2, Φ200/2, Φ250/2 Length-diameter ratio: L/D = 16-35 Above are our standard specification, we also can customize for you. Screw structure and compression ratio can be designed according to different products and raw material. Base Materials: 1)38CrMoAlA(JIS SACM 645) 2)42CrMo(AISI 4140) 3)Cr12MoV(JIS SKD-11) 4)4Cr5MoSiV1(JIS SKD-61) 5)9Cr18MoV DC53 (JIS G4404) Bimetallic Alloy Materials: 1)Fe-based alloy 2)Ni-based alloy 3)Co-based alloy 4)NiCo-based alloy 5)Wolfram carbide Bimetallic alloy level: Alloy powder including 40% Wolfram Carbon Alloy powder including 25% Wolfram Carbon Alloy powder including 9.5% Wolfram Carbon Processing Technology: Heat treatment High-frequency quenching Nitriding treatment Hard-chrome electroplating Bimetallic alloy welding Technical Parameter: Nitrided layer depth:0.50-0.80mm Nitrided hardness: 950-1100HV Nitrided brittleness: Less than 2 level Surface roughness: Ra 0.4μm Linearity of screw: 0.015mm/m Hard-chrome plating hardness after nitriding: ≥950HV Chrome-plating layer depth: 0.025~0.10mm Bimetallic layer depth: 3-5 mm Twin screw and barrel made: CINCINNATI, BATTENFELD, KRUSSMAFFEI, BAUSANO, AMUT model spares. We can manufacture all types of screws and barrels according to clients’ requirement.