... SCM440, 38CrMoALA 2.Injection capacity:30g-25000 concial twin screw barrel Injection capacity:30g-25000g TECHNICAL DATA 1.Depth ... Roughness of the surface:Ra 0.4μm 4.Screw straightness: 0.015mm/m 5.Chrome plating thickness ... : 0.05-0.1mm 6.Fully hard screw(wear-proof, corrosion-proof, heatproof, high-pressure ... plastic material: PP,PE,ABS,AS,PS etc. 8.Material: SACM-645, SCM440, 38CrMoALA