Figures below consolidate published property data from Victrex 450G / 450CA30, Solvay KetaSpire and Evonik VESTAKEEP. Specific grades should always be confirmed against the manufacturer's TDS.
Specific strength is roughly eight times that of aluminium at about half the density — which is where the weight-saving opportunity comes from.
In dry-running and marginally lubricated duties, PEEK outlasts metal mating pairs by a wide margin.
The natural choice for acid and alkali environments and for high-frequency insulation.
Elastic modulus close to human bone and X-ray transparent — medical implant grades are well established.
| Brand | Representative grades | Characteristics and applications |
|---|---|---|
| Victrex (UK) | 450G / 450CA30 | The industry benchmark. 450G is the general-purpose high-strength grade; 450CA30 is 30 % carbon-fibre reinforced, stiff and wear resistant — the workhorse for robot and semiconductor structural parts. |
| Solvay (Belgium) | KetaSpire KT-820 / KT-880 | Unfilled and high-flow grades. KT-880 flows well in thin-wall and complex geometry, where filling is the constraint. |
| Evonik (Germany) | VESTAKEEP 2000G / 4000G / INFINAM | 2000G general purpose; 4000G higher molecular weight for toughness; the INFINAM range is for additive manufacturing. |
| Domestic grades | e.g. Zhongyan | Industrial-grade domestic PEEK is mature and costs roughly half of imported material — strong value for industrial applications. For medical or aerospace use, select grades against the applicable regulations. |
| Material | Full name | Key properties | Where it fits |
|---|---|---|---|
| PEEK | PEEK (Polyetheretherketone) | 260 °C continuous use, self-lubricating and wear resistant; carbon- or glass-fibre reinforced grades available. | Our main material, with a dedicated process database. |
| PEI / Ultem | PEI / Ultem (Polyetherimide) | High strength and high dielectric strength, inherently flame retardant. | Aerospace cable supports, precision structural parts. |
| PPS | PPS (Polyphenylene sulfide) | Chemical resistant, excellent dimensional stability, low water absorption. | EV power connectors, sensor housings. |
| PPA | PPA (Polyphthalamide) | High-temperature polyamide, good strength above 150 °C. | Automotive under-hood and e-mobility parts. |
| PPSU | PPSU (Polyphenylsulfone) | Hydrolysis resistant, steam-sterilizable, high impact. | Medical devices, water-treatment components. |
| PSU / PES | PSU / PES | Transparent high-temperature sulfones with good hydrolytic stability. | Sterilizable housings, fluid-handling parts. |
| LCP | LCP (Liquid crystal polymer) | Very low shrinkage and excellent high-frequency performance. | 5G and semiconductor connectors. |
| PTFE / PCTFE | PTFE / PCTFE | Extreme chemical inertness and low friction. | Corrosive-media and sealing components. |
| PPO / PBI | PPO / PBI | Dimensionally stable engineering blends; PBI for the highest temperature duty. | Supporting grades for demanding thermal environments. |
Industrial-grade PEEK pricing has been falling steadily since 2017. Victrex material has moved from roughly RMB 1,000/kg to about RMB 600/kg, Solvay sits near RMB 400/kg, and domestic industrial grades are around RMB 300/kg. As domestic capacity comes online, "PEEK is too expensive" is becoming a historical objection — which is exactly the signal that steel-to-plastic conversion is entering its mainstream phase.
Indicative market pricing for planning purposes only; confirm current price and grade availability with us before budgeting.
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