Tempering hardness：HB260-290
Nitridation hardness：HV800-1050
Nitration case depth：0.4-0.7mm
Nitridation brittleness ≤ grade 1
Surface roughness：Ra0.4
Screw straightness：0.015mm
Chromium coating hardness after nitridation：≥900HV
Chromium coating thickness：0.05-0.10mm
Dual alloy hardness：HRC56-65
Dual alloy hardness：0.8-2.0mm
Material and technology
Quality 38CrMoAIA
Quality duplex stainless steel
Quality power metallurgy material
Cold/hot spraying hard metal technology
Advanced nitriding technology
Corrosion resistance, wear-resisting dual alloy spraying technology
Taper twin-screw, diplopore barrel series
SJS 35, SJS 51, SJS 55, SJS 65, SJS 80, SJS 92,
Screw diameter / screw amount
35/80-2, 51/105-2, 55/113-2, 65/132-2, 80/156-2, 92/188-2
Screw direction: anti-clockwiseoutward
Crew speed：
1-40,2-32,1-36,1-32,1-32,1-32
Screw effective length
810mm，1070,1200,1441,1800,2500mm
