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Covestro Makrolon® 2608 Polycarbonate
Categories: Polymer; Thermoplastic; Polycarbonate (PC); Polycarbonate, Molded

Material Notes: Medical devices; suitable for ETO and steam sterilization at 121°C; biocompatible according to many ISO 10993-1 test requirements; medium viscosity

Mechanical property data for samples at 50% RH.

Information provided by Covestro.

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Physical PropertiesMetricEnglishComments
Bulk Density 0.660 g/cc
@Temperature 23.0 °C
0.0238 lb/in³
@Temperature 73.4 °F
pellets; ISO 60
Density 1.20 g/cc0.0434 lb/in³ISO 1183-1
Moisture Absorption at Equilibrium 0.12 %
@Temperature 23.0 °C
0.12 %
@Temperature 73.4 °F
ISO 62
Water Absorption at Saturation 0.30 %
@Temperature 23.0 °C
0.30 %
@Temperature 73.4 °F
ISO 62
Linear Mold Shrinkage 0.0070 cm/cm
@Pressure 50.0 MPa
0.0070 in/in
@Pressure 7250 psi
60x60x2 mm; ISO 294-4
Linear Mold Shrinkage, Flow 0.0065 cm/cm
@Pressure 50.0 MPa
0.0065 in/in
@Pressure 7250 psi
60x60x2 mm; ISO 294-4
Melt Flow 13 g/10 min
@Load 1.20 kg,
Temperature 300 °C
13 g/10 min
@Load 2.65 lb,
Temperature 572 °F
ISO 1133
 
Mechanical PropertiesMetricEnglishComments
Ball Indentation Hardness 110 MPa
@Temperature 23.0 °C
16000 psi
@Temperature 73.4 °F
ISO 2039-1
Tensile Strength at Break 70.0 MPa10200 psi50mm/min; ISO 527-1,-2
Tensile Strength, Yield 65.0 MPa9430 psi50mm/min; ISO 527-1,-2
Elongation at Break >= 50 %>= 50 %50mm/min, complete break; ISO 524-1,-2
 120 %120 %50mm/min; b.o. ISO 527-1,-2
Elongation at Yield 6.3 %6.3 %50mm/min; ISO 527-1,-2
Tensile Modulus 2.35 GPa
@Temperature 23.0 °C
341 ksi
@Temperature 73.4 °F
1mm/min, complete break; ISO 527-1,-2
Flexural Strength 96.0 MPa13900 psi2mm/min; ISO 178
 72.0 MPa
@Strain 3.5 %
10400 psi
@Strain 3.5 %
2mm/min; ISO 178
Flexural Modulus 2.35 GPa
@Temperature 23.0 °C
341 ksi
@Temperature 73.4 °F
2mm/min; ISO 178
Flexural Strain at Break 7.0 %7.0 %2 mm/min; ISO 178
Izod Impact, Notched (ISO)  15.0 kJ/m²
@Thickness 3.00 mm,
Temperature -30.0 °C
7.14 ft-lb/in²
@Thickness 0.118 in,
Temperature -22.0 °F
Complete Break; ISO 7391/b.o. ISO 180-A
 65.0 kJ/m²
@Thickness 3.00 mm,
Temperature 23.0 °C
30.9 ft-lb/in²
@Thickness 0.118 in,
Temperature 73.4 °F
Partial Break; ISO 7391/b.o. ISO 180-A
Charpy Impact Unnotched  NB
@Temperature 23.0 °C
NB
@Temperature 73.4 °F
ISO 179-1eU
 NB
@Temperature -30.0 °C
NB
@Temperature -22.0 °F
ISO 179-1eU
 NB
@Temperature -60.0 °C
NB
@Temperature -76.0 °F
ISO 179-1eU
Charpy Impact, Notched  1.60 J/cm²
@Thickness 3.00 mm,
Temperature -30.0 °C
7.61 ft-lb/in²
@Thickness 0.118 in,
Temperature -22.0 °F
ISO 7391/b.o.ISO 179-1eA
 7.00 J/cm²
@Thickness 3.00 mm,
Temperature 23.0 °C
33.3 ft-lb/in²
@Thickness 0.118 in,
Temperature 73.4 °F
ISO 7391/b.o.ISO 179-1eA
Puncture Energy  60.0 J
@Temperature 23.0 °C
44.3 ft-lb
@Temperature 73.4 °F
complete break; ISO 6603-2
 65.0 J
@Temperature -30.0 °C
47.9 ft-lb
@Temperature -22.0 °F
complete break; ISO 6603-2
Tensile Creep Modulus, 1 hour 2200 MPa
@Temperature 23.0 °C
319000 psi
@Temperature 73.4 °F
ISO 899-1
Tensile Creep Modulus, 1000 hours 1900 MPa
@Temperature 23.0 °C
276000 psi
@Temperature 73.4 °F
ISO 899-1
 
Thermal PropertiesMetricEnglishComments
CTE, linear, Parallel to Flow 65.0 µm/m-°C
@Temperature 23.0 - 55.0 °C
36.1 µin/in-°F
@Temperature 73.4 - 131 °F
ISO 11359-1,-2
CTE, linear, Transverse to Flow 65.0 µm/m-°C
@Temperature 23.0 - 55.0 °C
36.1 µin/in-°F
@Temperature 73.4 - 131 °F
ISO 11359-1,-2
Thermal Conductivity 0.200 W/m-K1.39 BTU-in/hr-ft²-°Fcross flow; ISO 8302
Hot Ball Pressure Test 138 °C280 °FIEC 60695-10-2
Deflection Temperature at 0.46 MPa (66 psi) 139 °C282 °FISO 75-1,-2
Deflection Temperature at 1.8 MPa (264 psi) 127 °C261 °FISO 75-1,-2
Vicat Softening Point  146 °C
@Load 5.10 kg
295 °F
@Load 11.2 lb
@ 50°C/h; ISO 306
 147 °C
@Load 5.10 kg
297 °F
@Load 11.2 lb
@ 120°C/h; ISO 306
Glass Transition Temp, Tg 148 °C298 °F10°C/min; ISO 11357-1,-2
Flash Point 480 °C896 °FASTM D1929
Ignition Temperature 550 °C1020 °FSelf Ignition; ASTM D1929
 
Optical PropertiesMetricEnglishComments
Refractive Index 1.5861.586ISO 489 procedure A
Haze <= 0.80 %
@Thickness 3.00 mm
<= 0.80 %
@Thickness 0.118 in
for transparent material; ISO 14782
Transmission, Visible  87 %
@Thickness 4.00 mm
87 %
@Thickness 0.157 in
Luminous; ISO 13468-2
 88 %
@Thickness 3.00 mm
88 %
@Thickness 0.118 in
Luminous; ISO 13468-2
 89 %
@Thickness 1.00 mm
89 %
@Thickness 0.0394 in
Luminous; ISO 13468-2
 89 %
@Thickness 2.00 mm
89 %
@Thickness 0.0787 in
Luminous; ISO 13468-2
 
Processing PropertiesMetricEnglishComments
Melt Temperature 290 °C554 °Finjection molding; ISO 294
Mold Temperature 80.0 °C176 °Finjection molding; ISO 294
Injection Velocity 200 mm/sec7.87 in/secinjection molding; ISO 294
 
Descriptive Properties
Puncture Maximum Force (N)5400ISO 6603-2, at 23°C, complete break
 6300ISO 6603-2, at -30°C, complete break

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PB095058 / 200128

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