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PEEK GF30 | 30% Glass Fiber Reinforced PEEK

What is PEEK GF30?

The PEEK GF30 material is a composite of polyetheretherketone with 30% glass fibers added to enhance the tensile modulus, bending modulus, dimensional stability, and heat distortion, among other properties. With a 30% glass fiber reinforcement ratio, it can not only enhance the performance we mentioned earlier, but also retain its impact resistance to the greatest extent. Therefore, PEEK GF30 material is an ideal material for use as a load-bearing hughly insulation support component.Check Why we choose 30% fiber to reinforced？

It is Typical values for the grade are 175 MPa tensile strength, 265 MPa flexural strength and an 11.3 GPa flexural modulus (ISO 527 / ISO 178), against 100 MPa tensile strength, 165 MPa flexural strength and 4.1 GPa for unfilled PEEK. The glass reinforcement lifts the heat deflection temperature from 152°C to 315° C at 1.8 MPa, while the coefficient of thermal expansion along flow falls to 18 ppm/K even over Tg. Density is 1.51 g/cm³, continuous service temperature is 260°C, and the material remains UL 94 V-0.

PRES supplies PEEK GF30 as sheet, rod and pellets, in standard stock sizes and cut-to-order blanks.

PEEK GF30 pellets

PEEK GF30 pellets can be used for injection,compression molding and extrusion.This form is suitable for big quntity production.

PEEK GF30 Rods

PEEK GF30 rods are optimized for CNC turning of high-rigidity cylindrical components.

PEEK GF30 Sheet

PEEK GF30 sheets are optimized for CNC milling of high-rigidity planar and structural components

PEEK GF30 performance

PEEK GF30 combines the high-temperature stability of polyetheretherketone with 30% short glass fiber reinforcement, giving a well-balanced profile for load-bearing parts that must hold dimensional accuracy under continuous heat and static load. Typical values for injection-molded grades are 175 MPa tensile strength, 265 MPa flexural strength, 11.3 GPa flexural modulus, an HDT of 315 °C at 1.8 MPa, and a low flow-direction CTE of 18 ppm/K even above Tg. With continuous service up to 260 °C and a UL 94 V-0 rating, GF30 offers a lower-cost alternative to PEEK CF30 while remaining fully electrically insulating. For sliding-wear or high-impact applications, however, unfilled PEEK or carbon-fiber-reinforced grades should be considered instead.

Download PEEK GF30 data sheet

PEEK GF30 Mechanical Data sheet

Mechanical strength	Value	Test Standard
Tensile Strength,break,23°C	175 MPa	ISO 527
Tensile Elongation Break, 23℃	2.7 %	ISO 527
Flexural Strength Break, 23℃	265 MPa	ISO 178
Flexural Modulus ,23℃	11.3 GPa	ISO 178
Compressive Strength,23℃	250MPa	ISO 604
Izod Impact Strength Notched	10kJ/m²	ISO 180/A
Izod Impact Strength Unnotched	60kJ/m²	ISO 180/U

PEEK GF30 Electrical performance

Electrical Performance	Value	Test Standard
Dielectric Strength	25kV/mm	IEC 60243-1
Volume Resistivity	10^16 Ω·cm	IEC 60093

PEEK GF30 Thermal properties

Thermal properties	Value	Test Standard
Special Heat Capacity,23℃	1.7kJ/(kg·K)	DSC
Coefficient of Thermal Expansion,Along flow below Tg	18ppm/K	ISO 11359
Coefficient of Thermal Expansion,Along flow above Tg	18ppm/K	ISO 11359
Heat Deflection Temperature(HDT)	315℃	ISO 75
Thermal Conductivity	0.32W/(m·K)	ISO 604

The Advantages Of PEEK GF30?

The PEEK GF30 material is highly suitable as a structural material that can withstand loads continuously at high temperatures. With the addition of glass fibers, its heat distortion temperature reaches 315°C (599°F). When reaching the upper limit of long-term use temperature of 260°C, it still maintains a bending strength of approximately 100 MPa, while the retained bending strength and tensile strength of the unfilled PEEK at this temperature have already been very low.
The performance of PEEK CF30 material at 260°C is similar to that of PEEK GF30 material, and the retained performance is slightly higher than that of PEEK GF30 material. However, the cost of PEEK GF30 is much lower than that of PEEK CF30 material. Therefore, when considering high-temperature loads, creep resistance, PEEK GF30 material is the most ideal material. If more performance and grade comparisons are needed, you can refer to our PEEK Material Selection Guide.

PEEK GF30 vs Unfilled PEEK

Property	Unfilled PEEK	PEEK GF30	Change
Flexural modulus (ISO 178)	4.1GPa	11.3GPa	175.6%
Tensile strength (ISO 527)	100 MPa	175 MPa	+75%
HDT at 1.8 MPa	152 °C	315 °C	+163 °C
CTE along flow(below Tg)	45 ppm/K	18 ppm/K	~2.6 x lower
CTE along flow(Over Tg)	120 ppm/K	18 ppm/K	~6.7 x lower
Elongation at break	45%	2.7%	Much lower
Density	1.30 g/cm³	1.51 g/cm³	+16%
Shore D hardness	85D	88D	Slightly harder

From the above table, it is worth noting that the linear expansion coefficient of PEEK GF30 material remains at 18 ppm/K even after exceeding the Tg, while the CTE of the unfilled PEEK increases significantly after exceeding the Tg. Therefore, PEEK GF30 material has excellent dimensional stability.
In addition, the Flexural modulus of PEEK GF30 material increases by 175.6%, the tensile strength increases by +75%, and the density only increases by 16%. The specific strength is much higher than that of the unfilled PEEK material.

PEEK GF30 Application

The PEEK GF30 material is highly suitable for use as structural components with high rigidity and high insulation, capable of withstanding high static loads.Unfilled PEEK already delivers excellent fatigue resistance, but 30% glass fiber reinforcement (GF30 PEEK) raises the fatigue strength rating substantially—enabling the material to withstand higher alternating stress amplitudes while maintaining superior fatigue life. This makes GF30-PEEK the preferred choice for high-cycle fatigue applications such as gears, bearing housings, motor mounts, and reciprocating components.

High strength & Elecrtical Insulation & Heat resistance PEEK GF30 Component

Application Area	Typical GF30 PEEK Components	Why Choose GF30 PEEK
Electrical & High-Temperature Insulation	Temperature Insulation High-temperature connectors coil bobbins relay insulation components high-voltage connectors motor insulation components electrical isolation brackets	High stiffness and electrical insulation, while also providing good flame resistance and resistance to electrical arcing
Aerospace	Structural brackets supports bushings spacers sensor housings cable clamps tubing fittings	High specific stiffness low density creep resistance flame resistance dimensional stability over a wide temperature range
Automotive & New Energy	Thrust washers sensor housings gears bearing cages engine-compartment brackets battery-pack supports	Resistance to oils and fuels high-temperature performance low moisture absorption and dimensional stability can reduce weight and NVH compared with selected metal components
Oil & Gas / Chemical Processing	Downhole tool components valve components seals bearings pumps fluid-control components	Resistance to oils hydrocarbons and many chemical media, with good mechanical performance under elevated-temperature and high-pressure conditions

PEEK Diversion plate

PEEK Insulating ring

PEEK Motor Mounting Base

When PEEK GF30 is not suitable for you?

Glass fibers have abrasive properties. When the surface of GF30 comes into contact with softer mating surfaces (such as stainless steel shafts, aluminum casings, and unfilled polymer seals), it will wear down the other material, and the glass fibers may also polish off the surface on the other side. For applications such as sliding wear, reciprocating motion, bearing cages and bushings, carbon fiber grades or this bearing grade PEEK would be more suitable.

The second situation is impact loading. The elongation at break drops to approximately 3%, so GF30 is not suitable for snap connections, thin hinge mechanisms, press-fit fixtures, and components subjected to impact loading, especially at temperatures below 0°C. Unfilled PEEK or PEEK CF30 can better absorb impact energy.

These limitations do not mean that the performance of PEEK GF30 material is poor. Each model has its own characteristics, and only the material that suits your actual working conditions and cost requirements is the appropriate one.