custom OEM stainless steel alloy single twin extruder screw barrel reciprocating injection lead feed screw auger diamond straight gap

Technical Specification
Depth of nitration: 0.5-0.8mm
Hardness of nitration: HV900-1100
Straightness of screw: 0.015mm
Fragility of nitration: Less than grade 1
Roughness of surface: Ra0.4um
Depth of alloy layer: 2-5mm
Hardness of alloy: HRC62-66
Hardness after hardening and tempering: HB280-320
Hard chrome plating thickness: 0.025-0.1mm
Hardness of hard chrome plating: ≥HV950
Inside& Outside diameter tolerance: ≤0.02

Material
(1) 38CrMoAIA (JIS SACM645)
(2) Cr12MOV (JIS SKD-11)
(3) 4Cr5MoSiV1(JIS SKD-61)
(4) 42Crmo (AISI 4140)
(5) 40Cr
(6) 9Cr18MOV

Surface treatment
(1) Heat Treatment
(2) High Frequency Treatment
(3) Nitriding Treatment
(4) Hard Chrome Plating Treatment
(5) Spraying Coating Bimetallic Treatment