Application Bulletin       Twin Screw, Co-Rotating Extruder Barrels Download PDF here (169 KB) Conforma Clad tungsten carbide clad extruder barrels and liners are engineered for a variety of co-rotating, twin-screw extruders. Flanged and non-flanged block and round barrels are available for Berstorff, Coperion (Werner & Pfleiderer), Davis-Standard, Leistritz and Theysohn extruders. Conforma Clad’s unique tungsten carbide wear protection (also known as WPR-29) provides exceptional abrasion and corrosion resistance. Features & Benefits Superior abrasion and corrosion resistance reduces wear and improves component life. Metallurgically bonded cladding optimizes heat transfer. Dense, uniform cladding provides consistent and predictable wear. Ductile tri-metallic apex resists chipping. Strong metallurgical bond is virtually impervious to chipping and flaking Cladding Characteristics >70,000 psi (483 MPa) Metallurgical Bond High Tungsten Carbide Loading Uniform Carbide Distribution & Microstructure High Inter-Particle Bond Strength Controlled Thickness Minimal Dilution No Interconnected Porosity           Replacement Barrel Capabilities   Barrel Dimensions (mm) Equipment Manufacturer Bore Diameter Barrel Length B&P Process Equipment 30-33 93-510 Berstorff 43-140 160-650 Clextral S.A. 53-200 185-700 Coperion Corporation (Werner & Pfleiderer) 30-177 93-720 Davis-Standard Corporation 32-152 105-490 Entek Extruders 27-133 144-510 Leistritz Corporation 27-135 108-490 Toshiba 41-136 164-544 Theysohn 30-120 120-560 Cladding Composition (Weight Percentage)     WC 200 WC 219 Tungsten Carbide* 62% 48% Nickel 30% 39% Chromium 6% 8% Other 2% 5% Total carbide loading from other carbide formation 68% 62% *Tungsten Carbide (WC) includes cobalt bonded WC. Cladding Properties   WC 200 WC 219 Density (lb/in3) 0.44 0.40 Thermal Conductivity (BTU in/h•ft2•°F) 230 170 Metallurgical Bond Strength (psi) >70,000 >70,000 Porosity <3% <3% Rockwell Hardness (HRC)** 64-70 56-62 Oxidation Resistance °F (°C) 1200 (650) 1200 (650) Tri-Metallic Apex Protection Conforma Clad utilizes a combination of materials to provide the best wear protection available. The steel substrate of the extruder barrel gives our wear protection the ductility of the steel. Conforma Clad’s WC200 wear solution is applied in the bores to provide maximum abrasion resistance. The WC219 formula is then applied to the critical geometry of the apex, which provides excellent abrasion resistance while still allowing for the added ductility required in this area. This combination allows your extruder barrels to withstand highly abrasive materials, while also protecting the apex against the chipping and spalling that occurs with most wear protection applications. Performance Data For most conditions, Conforma Clad WC200 is applied to the barrels for maximum abrasion resistance, and Conforma Clad WC219 is applied only to the apex for increased ductility. For extremely corrosive conditions, Conforma Clad WC219 can be applied to the barrels as well.