Home default Screw and barrel made of nitrided 38CrMoALA wear resistant, corrosion resistant, high strength. Screw and barrel made of nitrided 38CrMoALA wear resistant, corrosion resistant, high strength. Pvc Pipe December 21, 2019 Share: Facebook Twitter Pinterest Screw and barrel made of nitrided 38CrMoALA wear resistant, corrosion resistant, high strength. ... Click to read moreOthers news: Another news: