La description

twin screw and barrel Product Specification and technical data ض5、ظ0、ع0、ر*5、ر*5、ر*6、 ر*0、ر*0、ر*0、ر*0、ز*0 Hardness of quenching and tempering：HB**0?～**0? Hardness of nitration：HV**0?～***0? Depth of Nitrated Layer：0.*5～0.7mm Fragility of nitration：≤ Grade 2 Surface roughness ：Ra0.4 straightness：0.**5mm Hardness of Cr-coating Layer：HV≥**0HV Nitrided layer thickness：0.*5～0.*0mm Thickness of Cr-coated Layer：0.8～2.0mm Hardness of bimetallic alloy ：HRC*6?～*5?（Ni-based alloy） material :quality alloy steel ① *8CrMoALA(JIS SACM**5) ② *2CMo(JIS SCM**0) ③ 9Cr*8MoV ④ CW6Mo5Cr4V2 Heat-treatment： Nitriding treatment Electroplated hard-chrome finish High-frequency quenching Spray coating Bimetallic-alloy vacuum quenching