38CrMoAlA Screw Barrel For Plastic Extruder

Product Description

The Screw structure and compression ratio can be designed according to different products & different output requirement.

Specification of screw and barrel

Material:38CrMoAlA, 42CrMo(JIS SCM440), SKD11,61

Diameter:Φ15mm-350mm

Nitride Case Depth:0.5mm-0.8mm

Nitride Hardness:1000-1100HV

Nitride Brittleness:≤Grade One

Surface Roughness:Ra0.4um

Screw Straightness:0.015mm

Alloy Hardness:HRC68-72

The ratio of length to diameter: L/D=12-45

Types of screw

Gradual type, mutant type, wave type, barrier type, double screen type, shunt type, separation type, exhaust type, pin type, mixed type, double-head type, three-head type, multi head type ,etc.

Application
It is widely used to cable , sheet , pipe , profile,etc.

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