Typical Property Values of Polycarbonate

Property
Test Method
Units
Value
Physical Properties
Specific Gravity
ASTM D792
1.20
Refractive Index @ 77° F
ASTM D542A
1.586
Light Transmission (Average), 1/8" disk
ASTM D1003
%
88
Rockwell Hardness
ASTM D785
M70
Water Absorption, Equilibrium, 24 hours @ 73° F - 212° F
ASTM D570
%
0.15 - 35.58
Mechanical Properties
Tensile Strength @ Yield Ultimate
ASTM D638
psi
9,0009,500
Tensile Modulus
ASTM D638
psi
345,000
Flexural Strength
ASTM D790
psi
13,500
Flexural Modulus
ASTM D790
psi
345,000
Flexural Endurance @ 1,800 cycles/min, 73°F, 50% RH
ASTM D671
psi
1,000
Compressive Strength
ASTM D695
psi
12,500
Compressive Modulus
ASTM D695
psi
345,000
Elongation
ASTM D638
%
110
Poisson’s Ratio
0.37
Izod Impact Strength Notched @ 1/8” Unnotched @ 1/8”
ASTM D256A
ft-lbs/in
12 - 1660 (no failure)
Tensile Impact Strength, S-Type Specimen
ASTM 1822
ft-lbs/in²
225 - 300
Shear Strength @ Yield Ultimate
ASTM D732
psi
6,00010,000
Shear Modulus
ASTM D732
psi
114,000
Deformation Under Load @ 4,000 psi @ 73° F - 158°F
ASTM D621
%
0.2 - 0.3
Thermal Proerties
Coefficient of Thermal Expansion
ASTM D696
in/in/°F
3.75 x 10-5
Coefficient of Thermal Conductivity
ASTM C177
Btu.in/hr.ft².°F
1.35
Specific Heat @40°C
cal/gm/°C
0.30
Heat Deflection Temperature @264 psi @ 66 psi
ASTM D648
°F
270280
Brittle Temperature
ASTM D746
°F
-211
Flammability Properties
Horizontal Burn (Flame Spread) AEB
ASTM D635
in
<1