Victrex PEEK 450G is the industry-standard, unfilled natural grade of polyether ether ketone (PEEK) — the reference material that most engineers specify when they simply write “PEEK” on a drawing. For overseas buyers, China has become one of the most efficient places to source both genuine Victrex 450G stock shapes and increasingly competitive domestic PEEK equivalents. This guide covers grade selection, realistic price benchmarks, and a practical sourcing workflow.
1. What Exactly Is PEEK 450G?
PEEK 450G is Victrex’s general-purpose, medium-viscosity unfilled grade, supplied as natural (beige/tan) granules for injection molding and extrusion. Key typical properties:
- Continuous use temperature: up to 260°C (UL RTI ~240°C)
- Melting point: 343°C; glass transition ~143°C
- Tensile strength: ~98 MPa; flexural modulus ~4.1 GPa
- Chemical resistance: excellent against fuels, oils, steam and most solvents
- Flammability: inherently V-0 without additives, very low smoke and toxic gas emission
Common downstream forms sold from China: virgin granules, extruded rods (typically 6–200 mm diameter), sheets/plates, tubes, and CNC-machined finished parts.
2. When 450G Is the Right Choice — and When It Isn’t
| Requirement | Recommended grade |
|---|---|
| General machining stock, seals, bushings, connectors | 450G (unfilled) |
| Higher stiffness / dimensional stability | 450GL30 (30% glass fiber) |
| Wear & friction (bearings, thrust washers) | 450FC30 (carbon fiber + PTFE + graphite) |
| Thin-wall injection molding | 150G (lower viscosity) |
| Implantable medical devices | PEEK-OPTIMA / VESTAKEEP i-grades (do not substitute 450G) |
3. Genuine Victrex vs Chinese Domestic PEEK
China now has several established PEEK polymerization producers (e.g., in Jilin and Shandong provinces) whose unfilled grades target 450G-equivalent specifications. Practical differences buyers should understand:
- Genuine Victrex 450G: full global traceability, lot-level certificates, required by most aerospace and medical OEM specifications. Higher cost.
- Chinese domestic PEEK: typically 30–50% cheaper; property data sheets are close to 450G for mechanical values, but batch consistency, color stability and high-end certification coverage vary by producer. Well suited for industrial parts, oil & gas, electronics fixtures and general machining stock.
Rule of thumb: if your end customer’s drawing explicitly calls out “Victrex 450G”, buy genuine resin or shapes extruded from certified 450G, and request the Victrex lot number on the material certificate. If the drawing only says “PEEK, unfilled, natural”, domestic resin is usually acceptable and significantly cuts cost.
4. 2026 Price Benchmarks (Ex-China, Indicative)
| Product form | Typical range (USD) | Notes |
|---|---|---|
| Victrex 450G virgin granules | $75–105 / kg | Volume and channel dependent |
| Chinese unfilled PEEK granules | $40–65 / kg | 450G-equivalent spec |
| Extruded PEEK rod (natural) | $60–120 / kg | Small diameters carry higher $/kg |
| PEEK sheet/plate | $65–130 / kg | Annealed, stress-relieved preferred |
| CNC machined PEEK parts | Quoted per drawing | Material + machining + tolerance class |
Prices are indicative market ranges for mid-2026 and move with resin feedstock (fluoroketone monomer) costs and order volume. Always confirm current quotations against your specific volume, form and certification requirements.
5. Practical Sourcing Workflow from China
- Fix the specification first. State resin brand/grade (or “450G-equivalent”), form, dimensions, tolerance, annealing requirement, and any certification (RoHS, REACH, FDA food-contact if relevant).
- Request samples with material certificates. For rods and sheets, ask for the resin lot certificate plus the extruder’s own QC report (density, tensile, DSC melting point).
- Verify material identity on receipt. Simple checks: density ~1.30 g/cm³ for unfilled PEEK, DSC melt peak at ~343°C, FTIR spectrum match. Third-party labs in China can run these for a modest fee before shipment.
- Watch for common substitution risks. Recycled/regrind PEEK blended into “virgin” rod, or PPS/PEI sold as PEEK at too-good-to-be-true prices. A quoted price far below the ranges above is a warning sign, not a bargain.
- Logistics. Granules ship as standard non-hazardous cargo (25 kg bags, moisture-barrier liner). Rods and sheets need rigid crating to prevent bow. Typical lead time: 7–15 days for stock shapes, 20–35 days for custom extrusion or machined parts. FOB Shanghai/Ningbo/Shenzhen are the most common terms; DDP air freight is economical for small machined-part batches.
6. FAQ
Q: Can I mix genuine 450G and domestic PEEK in the same product line?
Yes, many buyers dual-source: certified applications on Victrex resin, cost-sensitive industrial parts on domestic resin. Keep the two flows separately documented to protect traceability.
Q: Does PEEK rod need annealing?
For precision machining, yes — buy stress-relieved (annealed) rod, otherwise parts can warp after heavy material removal.
Q: What MOQ should I expect?
Granules: usually 25 kg (one bag) from traders, 500 kg–1 t from producers. Stock shapes: often no MOQ beyond one rod/sheet. Custom extrusion: typically 50–100 kg per size.
Disclaimer: Property values are typical datasheet figures and price ranges are indicative market observations for 2026; confirm all specifications and quotations with your supplier before ordering.