Specifications:Ø15mm-Ø300mm
Length/Diameter Ratio:15～55
Screw can be selected from ordinary,gradual,
mutational,pinned,shielding,separating and exhausting types.

Materials:

 Alloy-steel of high quality

1) 38CrMoAlA(JIS SACM645)

2)  9Cr18MoV

technical parameters:

Nitrided Hardness: HV 900-1000
Nitrided Case Depth: 0.50mm-0.80mm
Alloy hardness: HRC50-65
Alloy depth: 0.8mm-2.0mm
Advanced nitriding process
Corrosion&Abrasion resistance bimetal spraying process