Stainless Steel Single Screw Barrel and Screw for Corrosive Polymer Processing
URL Slug: stainless-steel-single-screw-barrel-corrosive-polymer
Product Summary
This single screw barrel and screw set is constructed from corrosion-resistant stainless steels and superalloys, designed for processing polymers that contain corrosive additives or produce aggressive degradation byproducts. Materials include AISI316 (1.4401), 1.4462 (duplex), 9Cr18MoV, Hastelloy C-276, Inconel 718, and Monel 400/500. Optional nitriding and chromium plating further enhance surface hardness. Suitable for film blowing and pipe extrusion of engineering plastics, fluoropolymers, and highly filled compounds with corrosive components.
Key Selling Points
- Corrosion-Resistant Materials: Choose from austenitic stainless (AISI316, 1.4462), martensitic (9Cr18MoV), or nickel-based alloys (Hastelloy C-276, Inconel 718, Monel) to match your polymer chemistry.
- Optional Surface Treatments: Nitriding (HV850-1000) and chromium plating (≥900HV, 0.025-0.10mm) provide additional wear and corrosion resistance.
- High Precision: Surface roughness Ra 0.4 and straightness 0.015mm ensure consistent melt quality and reduced downtime.
- Proven in Harsh Environments: Case study demonstrates enhanced wear and corrosion resistance, prolonged service life, and minimized production downtime for a plastic products manufacturer.
- ISO Certified: Manufactured under ISO9001:2015 quality management system and ISO14001:2015 environmental management system.
Technical Specifications
| Parameter | Value |
| Diameter Range | Φ20 - Φ500 |
| Available Materials | AISI316, 1.4462, 9Cr18MoV, Hastelloy C-276, Inconel 718, Monel 400, Monel 500 |
| Surface Roughness | Ra 0.4 |
| Straightness | 0.015 mm |
| Optional Nitrided Hardness | HV850-1000 (on suitable base materials) |
| Optional Chrome Plating Hardness | ≥900 HV |
| Chrome Plating Depth | 0.025-0.10 mm |
Models and Options
Available in all diameters from Φ20 to Φ500. Material selection depends on the specific corrosive media and temperature. The screw and barrel can be made from the same or different materials. Custom linings (e.g., bimetallic) are not standard for stainless variants but can be discussed.
Materials and Structure
The screw and barrel are machined from solid stainless steel or nickel alloy billets. Surface treatment options include nitriding (for steels like 9Cr18MoV) and chromium plating. The structure is a single-piece design with high dimensional accuracy.
Applications
Ideal for processing corrosive polymers such as PVC with acidic stabilizers, fluoropolymers (PTFE, FEP), chlorinated polyethylene (CPE), and polymers with halogenated flame retardants. Also suitable for medical-grade plastics requiring high purity and corrosion resistance. The product is used in film blowing, pipe extrusion, and compounding lines.
Customization
We can customize materials, dimensions, flight profiles, and surface treatments to meet your exact requirements. MOQ: 1 unit. Delivery terms: FOB/CIF. Payment: 30/70. Pre-shipment testing available upon request.
Case Study
Client: Screw & Barrel Manufacturer & Distributor
Application: Sourcing, local replacement, and customized retrofitting of various machinery components.
Result: Successfully processed and manufactured complex components based on custom technical drawings with 100% precise mechanical fit.
Highlight: Wear resistant, long lifetime, excellent plasticizing effect.
(Source: Case ID 1601)
FAQ
Which materials are most suitable for processing PVC with high chlorine content?
We recommend AISI316 or 1.4462 duplex stainless steel for general corrosion resistance. For extreme conditions, Hastelloy C-276 is superior.Can you provide material certifications?
Yes, we supply mill test certificates (MTC) for all stainless and nickel alloys upon request.What is the typical lead time for a custom stainless steel barrel?
Lead time depends on material availability and complexity. Typically 4-8 weeks for single units.Do you offer a warranty on corrosion resistance?
We guarantee the material composition as specified. Service life depends on process conditions; typical lifespan ranges from 1-5 years under normal corrosive polymer processing.Can I combine different surface treatments?
Yes, for example, we can nitride a 9Cr18MoV screw and then chrome plate the barrel for enhanced performance.Is this product FDA or EU food contact compliant?
Materials like AISI316 are generally food-grade, but compliance depends on the specific polymer and process. Please consult with our engineers.What is the minimum order quantity?
MOQ is 1 unit.Inquiry Information
For pricing and technical consultation, contact:
Name: Martin
Email: info@gmscrew.com
Tel: +86 13575629951
WhatsApp: +86 13858143949
Address: Zhoushan, China
Download catalogue: Product Catalogue
Image Filename and Alt Suggestions
- stainless-steel-barrel-overview.png - Alt: Stainless steel single screw barrel overview for corrosive polymer processing
- stainless-steel-barrel-detail.png - Alt: Detail of stainless steel barrel surface finish
- stainless-steel-screw.png - Alt: Stainless steel screw with optional chrome plating
