Specifications:
Screw diameter: Ø 15 Ø 300
Length diameter ratio: 15-46
Product type:
Screw for different plastic products can be selected: ordinary type, pin type, barrier type, separation type, exhaust type, etc
Base 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 chromium coating on the surface after nitriding: ≥ 950HV
Chromium coating thickness: 0.025~0.085mm
Double alloy depth: 3mm