screw and barrel (used injection molding machine)

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Technical Index of Screw and Barrel
Raw material:		1.38CrMoAlA 2. 42CrMo 3. SKD61
Hardness of quality adjustment:		HB280°-290°
Straightness:		0.015mm / m
Roughness of surface:		Ra0.4μm
Depth of Nitrated Layer:		0.4-0.6mm
Hardness of nitration:		900-1060HV(HRC56°- 65°)
Fragility of nitration:		Less than grade 2
Surface hardness of nitrated Cr coating layer:		≥950HV (HRC55°-72°)
Thickness of Cr-coating layer:		0.03-0.08mm
Hardness of bimetallic treatment:		HRC55°-62°
Depth of bimetallic treatment:		2.5-4mm
Use in		PP, PE, PA, PC, ABS, AS ect.

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