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Screw and barrel for extruder

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1) 38CrMoAlA(JIS SACM645)
2) 42CrMo(JIS SCM440)

 

1) 38CrMoAlA(JIS SACM645)
2) 42CrMo(JIS SCM440)

 

Heat-treatment
Nitriding treatment
Electroplated hard-chrome finish
High frequency quenching
Spray bimetallic coating
Vacuum quenching

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