Specifications:

 

Screw diameter: Ø 15-Ø 300

 

Aspect ratio: 15-46

 

 

 

Product type:

 

For different plastic products, screw can be selected: common type, pin type, barrier type, separation type, exhaust type, etc

 

Substrate material:

 

1)38CrMoAlA(JIS SACM645)

 

2)42CrMo(AISI 4140)

 

 

 

Treatment process:

 

heat treatment

 

Nitriding treatment

 

 

 

Technical parameters:

 

Nitriding depth: 0.50mm-0.80mm

 

Nitriding hardness: 900-1000hv

 

Nitriding brittleness: < = grade 1

 

Surface roughness: RA 0.4

 

Screw straightness: 0.015mm

 

Hardness of surface chromium plating after nitriding: ≥ 950hv