Natural PEEK Rods & Sheets (Virgin Unfilled Machining Stock)
High-temperature and chemical-resistant Natural PEEK Rods and Sheets (virgin unfilled grade) engineered for precision CNC machining. Features 143°C Tg, 343°C melting point, 316°C HDT, UL94 V-0 flame rating, and FDA food-contact compliance. Fully stress-relieved extruded stock for aerospace, medical, and food processing applications. Contact us for custom diameters (Φ3 – 300mm), sheet thicknesses, and fast RFQs.
Product information
Published information supports preliminary product selection. Confirm the exact grade, dimensions, tolerances, documentation and application suitability with the quotation for your order.
Description
Natural PEEK Rods and Sheets (100% virgin unfilled polyetheretherketone) represent the industry baseline for ultra-high performance engineering thermoplastics. Unfilled natural PEEK offers the highest impact toughness, ductility, and elongation at break among all PEEK grades, combined with outstanding chemical inertness, high dielectric strength, and continuous thermal resistance up to 260°C. Produced using advanced automated continuous extrusion with double-annealing stress relief, our natural PEEK stock guarantees zero internal porosity and zero warpage during precision CNC machining.
Key Mechanical & Physical Performance Data:
| Physical & Mechanical Property | Nominal Value | Test Standard / Note |
| Tensile Strength | 95 – 105 MPa | ISO 527 / ASTM D638 |
| Flexural Modulus | 3.8 – 4.2 GPa | ISO 178 / ASTM D790 |
| Glass Transition Temp (𝑇𝑔) | 143°C | DSC |
| Melting Point (Tₘ) | 343°C | DSC |
| Heat Deflection Temp (HDT @ 1.8 MPa) | 152°C | Short-term peak up to 320°C |
| Dielectric Strength | 20 – 24 kV/mm | IEC 60243 |
| Water Absorption (24h) | < 0.1% | ISO 62 |
| Flammability Rating | UL94 V-0 (0.8mm) | Inherent without additives |
Why Specify Virgin Natural PEEK Over Filled Grades?
• Highest Impact Resistance & Elongation: Unlike 30% glass-filled or 30% carbon-filled PEEK which become stiff and brittle, natural PEEK retains exceptional toughness and flexibility, making it ideal for snap-fit parts, dynamic seals, and flexible valve seats.
• Superior Electrical & Thermal Insulation: Free from conductive carbon or glass fibers, natural PEEK provides ultra-high dielectric breakdown strength for high-voltage electronic isolators and semiconductor wafer combs.
• Certified Food & Medical Contact: Complies with FDA (21 CFR 177.2415), EU 10/2011 food contact regulations, and ISO 10993 / USP Class VI biocompatibility requirements for sterilizable medical tools.
CNC Machining & Processing Recommendations:
Natural PEEK machines exceptionally well using standard metalworking equipment. For tight tolerances and superior surface finishes:
• Tooling: Use sharp, high-rake carbide or diamond-coated cutting tools.
• Coolants: Water-soluble coolants or dry air blasts are recommended to prevent thermal buildup during deep drilling.
• Stress Relief: Every extruded rod (Φ3mm – 300mm) and sheet (5mm – 100mm) is fully annealed. For heavy material removal, intermediate stress-relief annealing is recommended to maintain micron-level tolerances.
Target Industry Applications:
• Food Processing & Pharmaceutical: FDA-compliant scraper blades, dosing pistons, manifold blocks, and sterilizable diagnostic tool handles.
• Semiconductor & Electrical: Wafer handling combs, high-voltage insulators, terminal blocks, IC socket bodies, and connector housings.
• Fluid & Chemical Equipment: Valve seats, wear rings, chemical pump impellers, seals, and corrosion-resistant bushings operating up to 260°C.
Quality Assurance & Supply Capabilities:
• Quality Standards: Ultrasonic NDT tested to ensure 100% void-free internal structure.
• Stock Availability: Rods from Φ3mm to 300mm (lengths 1000mm / 3000mm) and sheets from 5mm to 100mm thickness.
• Documentation: Full Material Test Reports (MTR), FDA certificates, and Certificates of Conformance (CoC) shipped with every batch.
Need technical datasheets, CAD evaluations, or a custom quote? Send us your STEP/DWG drawings or required dimensions for an immediate response.
Material overview
Understanding PEEK (Polyether Ether Ketone)
Why engineers use it
- Strong balance of heat, chemical and mechanical performance.
- Can be molded, extruded, machined or printed in suitable grades and equipment.
- Good fatigue and wear potential for demanding moving or loaded parts.
- Available in unfilled, glass-fiber, carbon-fiber and wear-modified grades.
- Suitable for precision components where long-term reliability justifies a specialty polymer.
Limits to consider
- High processing temperature requires capable equipment and controlled drying.
- Crystallinity, cooling and annealing can affect dimensions and performance.
- Reinforcement improves some properties but may reduce ductility or change machining behavior.
- Not every chemical, wear or medical application is covered by a standard industrial grade.
- PEEK can be unnecessary over-specification where PPS, PEI or another polymer meets the duty.
Grades and product forms
Unfilled PEEK provides the broad base-property balance. Glass-fiber grades generally target stiffness and dimensional control; carbon-fiber grades may add stiffness, strength and conductivity; bearing grades use fillers such as carbon, graphite or PTFE to tune friction and wear. Film, filament, powder, pellets and stock shapes each require different processing and purchasing information.
Performance points to review
| Evaluation area | Why it matters | Information to provide |
|---|---|---|
| Temperature behavior | Useful performance under elevated or changing temperature | Continuous and peak temperature, cycle length and time at load |
| Mechanical response | Strength and stiffness must match the real part geometry | Load direction, stress level, impact and fatigue expectations |
| Environmental resistance | Fluids, cleaning agents and atmosphere can change service life | Chemical name, concentration, temperature and exposure time |
| Dimensional control | Tight-tolerance parts depend on both material and processing | Finished dimensions, tolerances and assembly conditions |
| Electrical or insulation needs | Electrical requirements may influence grade and thickness | Voltage, dielectric, conductivity or insulation target |
These are engineering discussion points, not guaranteed property values. Final acceptance criteria should be agreed for the selected grade, process and order.
Typical application directions
These examples show where the material may be evaluated. They do not replace a suitability review for the finished component.
Fabrication and processing preparation
Share the finished part drawing as well as the requested rod diameter and length. This makes it possible to discuss machining allowance, tolerance, cut length, quantity and whether a closer starting size could reduce waste.
Where the application is critical, define what a successful trial looks like before material is ordered: dimensions after processing, visual condition, mechanical response, assembly fit or another measurable result.
When another material may be better
PPS, PEI, PSU/PPSU or a conventional engineering plastic may be more economical when temperature, chemical and mechanical requirements are moderate. PEEK is justified when several demanding requirements occur together or when service life and reliability outweigh raw-material cost.
We recommend sharing the current material and the reason it is being reconsidered. Cost, processability, supply form and inspection burden belong in the decision alongside technical performance.
Information needed for an accurate quotation
A useful RFQ reduces follow-up questions and helps us distinguish between a material request and a finished-part requirement.
| Product form | Raw material, stock shape, semi-finished blank or completed part |
|---|---|
| Dimensions | Nominal size, finished size and tolerances |
| Quantity | Trial quantity, first order and estimated annual demand |
| Application | Part function and current material, if any |
| Operating temperature | Continuous range, peak temperature and cycle duration |
| Environment | Chemicals, gases, moisture, pressure, vacuum or outdoor exposure |
| Mechanical duty | Load, speed, impact, wear and mating components |
| Documentation | Drawing revision, inspection, traceability or compliance needs |
Frequently asked questions
Can I request a sample or trial quantity?
Trial quantities can be discussed according to product form and availability. Tell us what you need to prove during the trial, the intended process and the expected production quantity if the test succeeds.
Do you provide a data sheet or material documentation?
Available documentation depends on the selected material and supply route. List the documents required by engineering, purchasing or quality when you inquire so they can be checked before quotation.
Can the grade be selected from a product name alone?
No. Similar product names can cover different grades, colors, fillers and processes. Selection should be based on the finished application, environment and required property balance.
Can you supply custom dimensions or finished parts?
Custom sizes, blanks or finished parts can be reviewed where appropriate. A drawing with tolerances, quantity and material requirement is the best basis for quotation.
How should we evaluate an alternative to our current material?
Share the current grade, the part’s service conditions and the reason for changing it. A useful comparison looks at failure mode, processing, life, inspection and total project cost—not only a single property value.
What determines lead time?
Lead time depends on product form, grade, size, quantity, documentation, machining and current availability. Confirm the required delivery date and destination with the RFQ rather than assuming a standard schedule.
Send the drawing, application and quantity. We will use the project details to prepare a practical material and supply discussion.
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