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Rulon Bearings

Covestro Makrolon® 1248 MAS068 Polycarbonate
Categories: Polymer; Thermoplastic; Polycarbonate (PC)

Material Notes: MVR (300 °C/1.2 kg) 7.0 cm³/10 min; food contact quality; medium viscosity; impact modified; injection molding - melt temperature 280 - 320 °C; available in light colors only

Information provided by Covestro

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Physical PropertiesMetricEnglishComments
Bulk Density 0.641 g/cc0.0231 lb/in³pellets; ISO 60
Density 1.20 g/cc0.0434 lb/in³ISO 1183-1
Moisture Absorption at Equilibrium 0.12 %0.12 %ISO 62
Water Absorption at Saturation 0.40 %0.40 %ISO 62
Linear Mold Shrinkage 0.0060 - 0.0080 cm/cm0.0060 - 0.0080 in/inparallel/normal; b.o. ISO 2577
Linear Mold Shrinkage, Flow 0.0075 cm/cm0.0075 in/in60x60x2 mm; 500 bar; ISO 294-4
Linear Mold Shrinkage, Transverse 0.0075 cm/cm0.0075 in/in60x60x2 mm; 500 bar; ISO 294-4
Melt Flow 7.0 g/10 min
@Load 1.20 kg,
Temperature 300 °C
7.0 g/10 min
@Load 2.65 lb,
Temperature 572 °F
ISO 1133
 
Mechanical PropertiesMetricEnglishComments
Ball Indentation Hardness 108 MPa15700 psiISO 2039-1
Tensile Strength at Break 65.0 MPa9430 psi50 mm/min; ISO 527-1,-2
Tensile Strength, Yield 61.0 MPa8850 psi50 mm/min; ISO 527-1,-2
Elongation at Break >= 50 %>= 50 %Nominal, 50 mm/min; ISO 527-1,-2
 115 %115 %50 mm/min; ISO 527-1,-2
Elongation at Yield 6.0 %6.0 %50 mm/min; ISO 527-1,-2
Tensile Modulus 2.25 GPa326 ksi1 mm/min; ISO 527-1,-2
Flexural Strength 88.0 MPa12800 psi2 mm/min; ISO 178
Flexural Yield Strength 68.0 MPa
@Strain 3.5 %
9860 psi
@Strain 3.5 %
2 mm/min; ISO 178
Flexural Modulus 2.25 GPa326 ksi2 mm/min; ISO 178
Flexural Strain at Yield 6.8 %6.8 %2 mm/min; ISO 178
Izod Impact, Notched (ISO)  30.0 kJ/m²
@Thickness 3.00 mm,
Temperature -30.0 °C
14.3 ft-lb/in²
@Thickness 0.118 in,
Temperature -22.0 °F
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
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  6.00 J/cm²
@Thickness 3.00 mm,
Temperature -30.0 °C
28.6 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
Impact  5200
@Temperature 23.0 °C
5200
@Temperature 73.4 °F
[N], Puncture Max Force; ISO 6603-2
 6100
@Temperature -30.0 °C
6100
@Temperature -22.0 °F
[N], Puncture Max Force; ISO 6603-2
Puncture Energy  50.0 J
@Temperature -30.0 °C
36.9 ft-lb
@Temperature -22.0 °F
ISO 6603-2
 55.0 J
@Temperature 23.0 °C
40.6 ft-lb
@Temperature 73.4 °F
ISO 6603-2
 
Electrical PropertiesMetricEnglishComments
Volume Resistivity 1.00e+14 ohm-cm1.00e+14 ohm-cmIEC 60093
Surface Resistance 1.00e+16 ohm1.00e+16 ohmIEC 60093
Dielectric Constant  3.1
@Frequency 1e+6 Hz
3.1
@Frequency 1e+6 Hz
IEC 60250
 3.2
@Frequency 100 Hz
3.2
@Frequency 100 Hz
IEC 60250
Dielectric Strength 34.0 kV/mm
@Thickness 1.00 mm
864 kV/in
@Thickness 0.0394 in
IEC 60243-1
Dissipation Factor  0.0012
@Frequency 100 Hz
0.0012
@Frequency 100 Hz
IEC 60250
 0.012
@Frequency 1e+6 Hz
0.012
@Frequency 1e+6 Hz
IEC 60250
Comparative Tracking Index 125 V125 VM, Solution B; IEC 60112
 225 V225 VSolution A; IEC 60112
 
Thermal PropertiesMetricEnglishComments
CTE, linear, Parallel to Flow 70.0 µm/m-°C
@Temperature 23.0 - 55.0 °C
38.9 µin/in-°F
@Temperature 73.4 - 131 °F
ISO 11359-1,-2
CTE, linear, Transverse to Flow 70.0 µm/m-°C
@Temperature 23.0 - 55.0 °C
38.9 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) 138 °C280 °FISO 75-1,-2
Deflection Temperature at 1.8 MPa (264 psi) 124 °C255 °FISO 75-1,-2
Vicat Softening Point  147 °C
@Load 5.10 kg
297 °F
@Load 11.2 lb
50 °C/h; ISO 306
 148 °C
@Load 5.10 kg
298 °F
@Load 11.2 lb
120 °C/h; ISO 306
Flammability, UL94 HB
@Thickness 1.50 mm
HB
@Thickness 0.0591 in
Flash Point 430 °C806 °Fignition; ASTM D1929
 540 °C1000 °Fself ignition; ASTM D1929
Oxygen Index 30 %30 %Method A; ISO 4589-2
Glow Wire Ignition Temperature  850 °C
@Thickness 1.50 mm
1560 °F
@Thickness 0.0591 in
IEC 60695-2-13
 850 °C
@Thickness 2.00 mm
1560 °F
@Thickness 0.0787 in
IEC 60695-2-13
 850 °C
@Thickness 3.00 mm
1560 °F
@Thickness 0.118 in
IEC 60695-2-13
Glow Wire Flammability Index  800 °C
@Thickness 1.00 mm
1470 °F
@Thickness 0.0394 in
IEC 60695-2-12
 800 °C
@Thickness 1.50 mm
1470 °F
@Thickness 0.0591 in
IEC 60695-2-12
 850 °C
@Thickness 2.00 mm
1560 °F
@Thickness 0.0787 in
IEC 60695-2-12
 900 °C
@Thickness 3.00 mm
1650 °F
@Thickness 0.118 in
IEC 60695-2-12
 960 °C
@Thickness 4.00 mm
1760 °F
@Thickness 0.157 in
IEC 60695-2-12
 
Processing PropertiesMetricEnglishComments
Melt Temperature 300 °C572 °FISO 294
Mold Temperature 80.0 °C176 °FISO 294
Injection Velocity 200 mm/sec7.87 in/secISO 294
 
Descriptive Properties
Electrolytic corrosionA1IEC 60426
Needle flame test10sMethod K; 3.0 mm, [IEC 60695-11-5]
 120sMethod F; 3.0 mm, [IEC 60695-11-5]
 5sMethod K; 2.0 mm, [IEC 60695-11-5]
 60sMethod F; 1.5 mm, [IEC 60695-11-5]
 60sMethod F; 2.0 mm, [IEC 60695-11-5]

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