Ketron™ CR-S PEEK is a polyetheretherketone material engineered to exhibit unique properties for static sealing applications in extreme cold, including cryogenic environments. This extremely durable material withstands exposure to temperatures as cold as -196°C (-320°F) without compromising its excellent tensile strength and low compressive modulus. Additionally, Ketron™ CR-S PEEK has a PFAS-free* formulation, making it an excellent substitute for fluoropolymer seals (*PFAS-free raw material as confirmed by resin supplier; no PFAS substances added during stock shapes manufacturing).
PROPERTIES
PFAS-free* formulation (*PFAS-free raw material as confirmed by resin supplier; no PFAS substances added during stock shapes manufacturing)
For static applications in cryogenic environments
Withstands temperatures as low as 196°C (-320°F)
Excellent tensile strength
Low Compressive modulus
Thermal Properties
Property
Value
Heat Deflection Temperature at 1.8MPa (264 psi) (ºC)
186
Continuous allowable service temperature in air
Flammability (UL Rating)
V-0
Mechanical Properties
Property
Value
Tensile Strength (MPa)
110
Tensile Modulus of Elasticity (MPa)
3,900
Compressive stress at 1% nominal strain (MPa)
39
Compressive stress at 2% nominal strain (MPa)
76
Compressive stress at 5% nominal strain (MPa)
133
Flexural Strength (MPa)
178
Charpy Impact Notched (kJ/m²)
4
Chemical Properties
Property
Value
Hot Water / Steam
Acceptable
Acids, Weak
Acceptable
Acids, Strong (pH 1-3)
Limited
Alkalies, Weak
Acceptable
Alkalies, Strong (pH 11-14)
Acceptable
Hydrocarbons - Aromatic
Acceptable
Hydrocarbons - Aliphatic
Acceptable
Ketones, Esters
Acceptable
Chlorinated Solvents
Acceptable
Alcohols
Acceptable
Inorganic Salt Solutions
Acceptable
Electrical Properties
Property
Value
Dielectric Strength (kV/mm)
Industry Specific Usage (FOOD)
Property
Value
FDA
Not compliant
EU
Not compliant
USDA
Not compliant
3A-SSI
Not compliant
VMX materials
Not compliant
Industry Specific Usage (MEDICAL)
Property
Value
ISO 10993-5 and USP <87>
Not compliant
ISO 10993-10 Sensitization
Not compliant
ISO 10993-10 (Intracutaneous Reactivity) and USP <88>
Not compliant
ISO 10993-11 and USP <88>
Not compliant
USP <88> (Implant)
Not compliant
ISO-10993-4
Not compliant
USP <661>
Not compliant
USP Class VI
Not compliant
AFO - Animal Free Origin
Not compliant
Industry Specific Usage (RECYCLED)
Property
Value
Statera™ portfolio
Not compliant
Industry Specific Usage (NUCLEAR)
Property
Value
Shielding Portfolio
Not compliant
PMUC certified
Not compliant
Industry Specific Usage (SEMICON)
Property
Value
ESd materials
Not compliant
Conductive materials
Not compliant
Miscellaneous Properties
Property
Value
Base Material
PEEK
Brand Family
Colors
Natural (beige)
Density (g/cm3)
1.31
Water Absorption after 24 hrs immersion in water (%)
