Weirui Screw, Barrel and Front End Components Material Selection Table
Products Grade Material Applications
Barrel Nitrided SACM645, ACM2, 38CrMoAL
(Chromium/Molybdenum/Aluminium alloy steel, Nitided HRC >68, T0.5mm )
Resin with Glass Fibre <5%
Bi-metallic with
(Tungsten Carbide/Chromium/Nickel/Boron alloy lining, WC >15%, HRC 51-53, T1.5mm)
Resin with Glass Fibre 10-20%
B Bi-metallic with
(Tungsten Carbide/Chromium/Nickel/Boron alloy lining, WC >25%, HRC 59-61, T1.5mm)
Resin with Glass Fibre 20-30%
A Bi-metallic with
(Tungsten Carbide/Chromium/Nickel/Boron alloy lining, WC >40%, HRC 64-66, T1.5mm) 
Resin with Glass Fibre 40-50%
Screw Nitrided SCM440, ACM2, 42CrMo, 38CrMoAL, DH2F
(Chromium/Molybdenum/Aluminium alloy steel, Nitrided HRC >63,T0.08mm)
Resin with Glass Fibre <5%
V4, 1.2379
( Powder-metallurgical alloy tool steel, vacuum-hardened, HRC 58-60)
Resin with Glass Fibre 10-20%
B M35, M2
(Powder-metallurgical alloy tool steel, vacuum-hardened, HRC 60-62)
Resin with Glass Fibre 20-30%
A ASP23, W650
( Powder-metallurgical alloy tool steel, vacuum-hardened, HRC 63-65)
Resin with Glass Fibre 40-50%
Ring Valves SACM645, V4, 1.2379, ASP23, DC53, DH2F, H13 (SKD61) with optional Gas/Plasma Nitriding, Chroming, TiN/CrN coating  
End Cap SACM645, SCM440, SUS440C, H13 (SKD61) with optional Gas/Plasma Nitriding, Chroming, TiN, CrN coating 
Nozzle Tip SACM645, 1.2379, SCM440, SUS440C, H13 (SKD61) with optional Gas/Plasma Nitriding, Chroming, TiN, CrN coating