Nitrided Screw Manufacturer and Exporter We are the top tier manufacturer, exporter and supplier of Plastic P rocessing M achiner y in Ahmedabad, India | we manufacture the best quality and cost - effective products. At Shreeji Corporation , We manufacture and export the finest twin Screw Barrel, Head, Ring Plunger, Nozzle Body, and components related to plastic process machinery. We are one of the best Nitrided S crew Manufacturers and E xporters in Ahmedabad. We make abiding Nitrided screws that are affordable. Nitriding is a heat - treating process that diffuses nitrogen into the surface of a metal to create a case - hardened surface. A Nitrided Screw has a plethora of manufacturing capabilities. The applications of nitrided screws are injection molding, extrusion molding, and blow molding. By using high - quality grade nitriding steel, with 72 hours of nitriding process, the nitrided layer will help the screw to get better performance by being corrosion and abrasion - resistant. Nitrided screws have a very good wear resistance until the surface of the hardness is worn away.The material that is used in a Nitrided Screw is EN41B and the surface hardness achieved through that is 65 - 68 HRC. There are multiple sizes available at Shreeji Corporation for the Nitrided Screw. The sizes available vary from 14mm to 200mm in diameter and the length can go up to 6 metres.