|
|
|
|
|
|
HI-Impact
Polystyrene
|
|
|
|
|
Units
|
ASTM
Test Method
|
Extruded
Polystyrene
|
|
MECHANICAL
|
1
|
Strength
to Weight Ratio
|
ksi
|
-
|
3.8
|
|
2
|
Specific
Gravity @73 F
|
-
|
D792
|
1.04
|
|
3
|
Tensile
Strength @73 F, (ult)/(yld)
|
psi
|
D638
|
4000
(ult)
|
|
4
|
Tensile
Modulus of Elasticity @ 73 F
|
psi
|
D638
|
-
|
|
5
|
Tensile
Elongation at Break @ 73 F
|
%
|
D638
|
50
|
|
6
|
Flexural
Strength @ 73 F
|
psi
|
D790
|
-
|
|
7
|
Flexural
Modulus of Elasticity @ 73 F
|
psi
|
D790
|
260000
|
|
8
|
Shear
Strength @ 73 F
|
psi
|
D732
|
-
|
|
9
|
Compressive
Strength, (% Deformation) @73 F
|
psi
|
D695
|
-
|
|
10
|
Compressive
Modulus of Elasticity @73 F
|
psi
|
D695
|
-
|
|
11
|
Hardness,
Rockwell, Scale as noted @73 F
|
-
|
D785
|
(L56)
|
|
12
|
Hardness, Durometer,
Shore D @73 F
|
-
|
D2240
|
-
|
|
13
|
Izod
Impact, (Notched) @73 F
|
ft-lb/in
of notch
|
D256
TypeA
|
-
|
|
14
|
Coefficient
of Friction, (Dry vs. Steel) Dynamic
|
-
|
-
|
-
|
|
15
|
Limiting
PV, (with 4 to 1 factor of safety applied)
|
psi-ft/min
|
-
|
-
|
|
THERMAL
|
16
|
Coefficient
of Linear Thermal Expansion @73 F
|
in/in/F
|
E-831
(TMA)
|
-
|
|
17
|
Heat
Deflection Temperature @ 264 psi
|
F
|
D648
|
183
|
|
18
|
Tg-Glass
transition temperature, (Amorphous)
|
F
|
D3418
|
-
|
|
19
|
Melting
Point, (VS=Vicat Softening Temp.)
|
F
|
D3418
|
-
|
|
20
|
Continuous
Service Temperature in Air, (Max.)
|
F
|
-
|
-
|
|
21
|
Thermal
Conductivity
|
BTU-in/hr-ft2-F
|
-
|
-
|
|
ELECTRICAL
|
22
|
Dielectric
Strength, Short Term
|
Volts/mil
|
D149
|
-
|
|
23
|
Volume
Resistivity
|
ohm-cm
|
D257
|
-
|
|
24
|
Dielectric
Constant @ 10E6 Hz
|
-
|
D150
|
-
|
|
25
|
Dissipation
Factor @ 10E6 Hz
|
-
|
D150
|
-
|
|
26
|
Flammability @
3.1 mm unless noted
|
-
|
UL94
|
-
|
|
H2O
|
27
|
Water
Absorbtion, Immersion, 24 Hrs
|
%
by wt.
|
D570(7)
|
-
|
|
28
|
Water
Absorbtion, Saturation
|
%
by wt.
|
D570(7)
|
-
|
