FPM / FKM

Material 64C8

Oils and fuels; high heat resistance.

Properties

Family	FPM / FKM
Standard	NF L 17-164
Nominal hardness	80 Shore A
Measured IRHD hardness	84
Continuous service temperature	−20 to +230 °C
Short-term temperature	−20 to +260 °C
Storage group	V

Properties measured at qualification

Qualification tests of compound 64C8 to NF L 17-164, carried out by an independent test laboratory. “—”: measured value with no requirement in the standard.

Property	Requirement	Measured
Initial state
Hardness IRHD (°)	76 to 85	84
Hardness Shore A (points)	80±5	83
Tensile strength (MPa)	≥12	16.5
Elongation at break (%)	≥150	178
Modulus at 100 % elongation (MPa)	—	8.8
Tear strength (kN/m)	—	27
Density (Mg/m³)	±0.03 between deliveries	1.85
Fuel immersion — 70 h at 23 °C in solvent B
Change in IRHD hardness (°)	-5 to 5	-1
Max. change in tensile strength (%)	-15	-4.8
Max. change in elongation (%)	-15	-4.5
Change in volume (%)	0 to 5	0.8
Lubricant immersion — 70 h at 200 °C in fluid 101
Change in IRHD hardness (°)	-15 to 5	-12
Max. change in tensile strength (%)	-30	-5.5
Max. change in elongation (%)	-20	9.6
Change in volume (%)	0 to 20	10.2
Heat ageing — 70 h at 250 °C in air
Change in IRHD hardness (°)	0 to 10	2
Max. change in tensile strength (%)	-30	-0.6
Max. change in elongation (%)	-15	-8.4
Max. change in mass (%)	-5	-1.7
Compression set
After 70 h at 200 °C in air (%)	≤25	15.9
Temperature retraction (TR 10)
Initial state (°C)	≤-12	-16.6

O-rings in this material in the catalogue

952 references · sorted by inside diameter.

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All catalogue sizes in 64C8