Bimetal screw barrel

KH1 Barrel: :Fe-based, wear resistant, alloy depth of 1.5-2mm, HRC60±2.

KH3 Barrel: Ni-based alloy, super wearing resistance, alloy depth of 1.5-2mm, HRC40±2.

KH5 Barrel: Ni-based alloy, super wearing resistance and corrosion resistance, alloy depth of 1.5-2mm, HRC45±2.

KH7 Barrel: Co-based alloy, high speed, pressure and temperature(600) resistance, wearing and corrosion resistance, alloy depth of 1.5-2mm, HRC50±2.