Material：38crMoAIA，Nitriding treatment，surface hardness HV≥900. Depth of nitration case：0.5-0.8mm

Material：38crMoAIA. The surface of the screw edge is welded with dual alloys, which can effectively increase the service life of the screw.

Material：38crMoAIA. The easy-to-wear part of the feed port adopts imported alloy steel. After special treatment, it can effectively improve the wear resistance of the barrel and increase the service life.

Specification：