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Ketron® Sterra™ HPV PEEK

1 of 9 products in this brand
Ketron® Sterra™ HPV PEEK shapes are carbon fiber reinforced with graphite and PTFE lubricants. This gives them the lowest coefficient of friction and the best machinability of all PEEK materials. Due to Ketron® Sterra™ HPV PEEK’s combination of low wear, low friction, and high LPV, this grade is often chosen as a solution for service bearings, bushings, insulators, valves, and seals. As part of the Sterra™ product portfolio, this material contains recycled content and exhibits a significantly lower carbon footprint compared to similar materials derived from non-recycled feedstocks.

Polymer Name: Polyetheretherketone (PEEK)

Additives Included: Lubricant (Graphite), Lubricant (PTFE)

Fillers Included: Carbon Fiber

Color: Black

Physical Form: Plates

Technical Data Sheet

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Identification & Functionality

Fillers Included
Plastics & Elastomers Functions
Technologies

Features & Benefits

Applications & Uses

Plastics & Elastomers End Uses

Properties

Color
Physical Form
Mechanical Properties
ValueUnitsTest Method / Conditions
Tensile Strength ⁷ ⁶78MPaISO 527-1/-2
Tensile Strain (Elongation, at Break) ⁷ ⁶3%ISO 527-1/-2
Tensile Modulus of Elasticity ⁹ ⁶5900MPaISO 527-1/-2
Shear Strength ⁶69
Shear Strength ⁶10000PSIASTM D732
Compressive Stress (at 1% Nominal Strain) ¹⁰ ⁶46MPaISO 604
Compressive Stress (at 2% Nominal Strain) ¹⁰ ⁶80MPaISO 604
Compressive Stress (at 5% Nominal Strain) ¹⁰ ⁶120MPaISO 604
Unnotched Charpy Impact Strength ⁶25kJ/m²ISO 179-1/1eU
Notched Charpy Impact Strength ⁶3kJ/m²ISO 179-1/1eA
Flexural Strength ¹² ⁶125MPaISO 178
Hardness, Rockwell Scale M ¹⁴ ⁶85ISO 2039-2
Hardness, Rockwell Scale M ¹⁴ ⁶85ASTM D785
Tensile Strength ⁶ ⁸11000PSIASTM D638
Tensile Strain (Elongation, at Break) ⁶ ⁸2%ASTM D638
Tensile Modulus of Elasticity ⁶ ⁸850PSIASTM D638
Compressive Strength ⁶ ¹¹20000PSIASTM D695
Notched Izod Impact Strength ⁶0.7ft.lb./inASTM D256
Flexural Strength ¹³ ⁶27500PSIASTM D790
Flexural Modulus of Elasticity ⁶1100PSIASTM D790
Thermal Properties
ValueUnitsTest Method / Conditions
Melting Temperature (at 10°C/min) ¹340°CISO 11357-1/-3 (Differential Scanning Calorimetry)
Thermal Conductivity (at 23°C) ¹0.78W/(K.m)
Coefficient of Linear Thermal Expansion (at -40°F - 300°F) ¹17μin./in./°FASTM E-831 (TMA)
Coefficient of Linear Thermal Expansion (at 23°C - 100°C) ¹35μm/(m.K)
Coefficient of Linear Thermal Expansion (Above 150°C) ¹85μm/(m.K)
Coefficient of Linear Thermal Expansion (at 23°C - 150°C) ¹40μm/(m.K)
Heat Deflection Temperature (Method A, 1.8 MPa) ¹195°CISO 75-1/-2
Service Temperature ⁴ ¹min. -20°C
Flammability (at 3 mm) ⁵ ¹V-0UL 94
Continuous Allowable Service Temperature in Air (20 hrs) ³ ¹482°F
Continuous Allowable Service Temperature in Air (20 hrs) ³ ¹250°C
Flammability (Oxygen Index) ¹43%ISO 4589-1/-2
Melting Temperature (at 50°F/min) ¹644°FASTM D3418 (Differential Scanning Calorimetry)
Thermal Conductivity (at 73°F) ¹1.7BTU in./(hr.ft².°F)
Heat Deflection Temperature (Method A, 264 PSI) ¹383°FASTM D648
Flammability (at 1/8 in) ⁵ ¹V-0UL 94
Miscellaneous Properties
ValueUnitsTest Method / Conditions
Density1.45g/cm³ISO 1183-1
Water Absorption (After 24h Immersion in Water of 23°C) ¹⁶0.05%ISO 62
Water Absorption (at Saturation in Water of 23°C)0.35%
Wear Rate ¹⁸2μm/kmISO 7148-2
Dynamic Coefficient of Friction ¹⁸0.15 - 0.25ISO 7148-2
Limiting PV (at 0.1 / 1 m/s Cylindrical Sleeve Bearings)0.66Mpa.m/s
Specific Gravity1.44ASTM D792
Water Absorption (After 24h Immersion in Water of 73°F) ¹⁷0.05%ASTM D570
Water Absorption (at Saturation in Water of 73°F) ¹⁷0.3%ASTM D570
Wear Rate ¹⁹100in³.min/ft.lbs.hrX10⁻¹⁰QTM 55010
Dynamic Coefficient of Friction ²⁰0.21QTM 55007
Limiting PV (at 100 FPM) ²¹20000ft.lbs/in².minQTM 55007
Note
  • Note: 1 g/cm³ = 1,000 kg/m³ ; 1 MPa = 1 N/mm² ; 1 kV/mm = 1 MV/m
  • This table, mainly to be used for comparison purposes, is a valuable help in the choice of material. The data listed here fall within the normal range of product properties of dry material. However, they are not guaranteed and should not be used to establish material specification limits or alone as the basis of design. See the remaining notes on the next page.
  • 1 The figures given for these properties are for the most part derived from raw material supplier data and other publications.
  • 2 Values for this property are only given here for amorphous materials and for materials that do not show a melting temperature (PBI & PI).
  • 3 Temperature resistance over a period of min. 20,000 hours. After this period of time, there is a decrease in tensile strength – measured at 23 °C – of about 50 % as compared with the original value. The temperature value given here is thus based on the thermal-oxidative degradation which takes place and causes a reduction in properties. Note, however, that the maximum allowable service temperature depends in many cases essentially on the duration and the magnitude of the mechanical stresses to which the material is subjected.
  • 4 Impact strength decreases with decreasing temperature, the minimum allowable service temperature is practically mainly determined by the extent to which the material is subjected to impact. The value given here is based on unfavorable impact conditions and may consequently not be considered as being the absolute practical limit.
  • 5 These estimated ratings, derived from raw material supplier data and other publications, are not intended to reflect hazards presented by the material under actual fire conditions. There is no ‘UL File Number’ available for these stock shapes.
  • 6 Most of the figures given for the mechanical properties are average values of tests run on dry test specimens machined out of rods 40-60 mm when available, else out of plate 10-20mm. All tests are done at room temperature (23° / 73°F)
  • 7 Test speed: either 5 mm/min or 50 mm/min [chosen acc. to ISO 10350-1 as a function of the ductile behavior of the material (tough or brittle)] using type 1B tensile bars
  • 8 Test speed: either 0.2"/min or 2"/min or [chosen as a function of the ductile behavior of the material (brittle or tough)] using Type 1 tensile bars
  • 9 Test speed: 1 mm/min, using type 1B tensile bars
  • 10 Test specimens: cylinders Ø 8 mm x 16 mm, test speed 1 mm/min
  • 11 Test specimens: cylinders Ø 0.5" x 1", or square 0.5" x 1", test speed 0.05"/min
  • 12 Test specimens: bars 4 mm (thickness) x 10 mm x 80 mm ; test speed: 2 mm/min ; span: 64 mm
  • 13 Test specimens: bars 0.25" (thickness) x 0.5" x 5" ; test speed: 0.11"/min ; span: 4"
  • 14 Measured on 10 mm, 0.4" thick test specimens
  • 15 Electrode configuration Φ 25 / Φ 75 mm coaxial cylinders in transformer oil according to IEC 60296 ; 1 mm thick test specimens
  • 16 Measured on disks Ø 50 mm x 3 mm
  • 17 Measured on 1/8" thick x 2" diameter or square
  • 18 Test procedure similar to Test Method A: “Pin-on-disk” as described in ISO 7148-2, Load 3MPa, sliding velocity= 0,33 m/s, mating plate steel Ra= 0.7-0.9 μm, tested at 23°C, 50%RH
  • 19 Test using journal bearing system, 200 hrs, 118 ft/min, 42 PSI, steel shaft roughness 16±2 RMS micro inches with Hardness Brinell of 180-200
  • 20 Test using Plastic Thrust Washer rotating against steel, 20 ft/min and 250 PSI, Stationary steel washer roughness 16±2 RMS micro inches with Rockwell C 20-24
  • 21 Test using Plastic Thrust Washer rotating against steel, Step by step increase pressure, the test ends when plastic begins to deform or if temperature increases to 300°F