Rigid pvc screws Nickel alloy with Hardchrome coating

Standard UPVC

38CrMoAlA

38CrMoAlA

Gas nitriding

Economical for low-output production

Screw: 2–3 years

Barrel: 2–4 years

UPVC with CaCO₃ filler

Bimetallic screw

Bimetallic barrel

Nickel-based alloy hardfacing

Corrosion + wear resistance

Screw: 3–5 years

Barrel: 5–8 years

High-output UPVC production

SACM645 bimetallic screw

Bimetallic barrel

PTA alloy welding

Stable continuous production

Screw: 5–7 years

Recycled UPVC

High-corrosion-resistant bimetallic screw

High-alloy bimetallic barrel

Tungsten carbide + nickel alloy

Handles unstable recycled compounds

Screw: 2–4 years

PVC electrical compounds

Nickel-alloy screw

Corrosion-resistant barrel

Chromium/nickel alloy coating

Reduces black spots and burning

Screw: 4–6 years

Heavy CaCO₃-filled UPVC

HIP wear-resistant powder steel screw

High-wear bimetallic barrel

Tungsten carbide coating

High abrasion resistance

Screw: 4–6 years