Conical twin screw and barrel for PVC pipe

Material: high quality 38CrMoAL, 1.8550, 1.8519,

SKD11, SKD61, D2,

Process: Advanced nitriding Process

Hardness After Hardening & Tempering: HB280-320

Nitrided Hardness: HV900-1000

Nitrided Case Depth: 0.45-0.7mm

Nitrided Brittleness: Less than Grade 2

Surface Roughness: Ra 0.4

Szie diameter45mm~diameter180mm