... ~6210,Alloy Depth :1.5~2.0mmMaterial&Processes1,Quality 38CrMoALA2,GH3#Steel3,Quality Powder Metallurgy Raw Materials4,Cold/Thermal Spray Hard Metal ... ,Corrosion & Abrasion Resistance Bimetal Spraying Process7,Horniness screw (HTP1:abrasion HTP2:corrosion resistance,HTP3:abrasion and corrosion resistance) Conical twin screw &barrel for plastic extruder