Extruder & Injection Molding Screw
Material Specifications

Listed below are the most common materials used for building Screws.
Each material is best for certain applications.

We'll be happy to help you find the best material of your needs.

Screw Materials Nitralloy 135M A tool steel machined and nitrided for 72 hours. An excellent low-cost alternative when excessive wear is not a primary consideration. 4140 A tool steel with good strength when surface threted or hard faced. D-2 A high carbon/high chrome tool steel. Good wear resistance but low on torque strength CPM-9V Excellent for abrasive applications with very good wear characteristic. Surface Treatments Nitriding Increases the hardness and life of tool steel screws such as 135M and 4140. Very cost effective. Chrome Plating Offers hardness and low friction with corrosion protection. Double and triple chrome plating often used for corrosive applications. Carbide Coating Carbide Coating - Guaranteed to double the life of a 9V screw.  Hard Facing - On Screw Flites Stellite #6 Cobalt based. Recommended for resins with a low percentage of filled materials. 37-42 RC hardness. Stellite #12 Save as above with 40-47 RC hardness. Colmonoy 56 Nickel based. More wear resistant than Stellite. Recommended for glass-filled or resins. 50 to 55 RC hardness.

We Have a many different  coatings and Material for various material you run. Please let us know what Plastic Materials you are using and we can suggest the proper Material or Coating for your Screws, Barrels and Screw Tips.   For a quote Call or E-mail Sales@CompletePlastics.com 770-427-3834 Phone 770-427-3932 Fax