Property Terms Cheat Sheet

Coefficient of Friction	The resistance of a material to sliding forces where, the higher the number, the higher the friction.
Coefficient of Linear Thermal Expansion	Measure of growth of a material as temperature changes.
Compressive Modulus of Elasticity	The ratio of force to deformation as a material is being squeezed.
Compressive Strength	The resistance of a material to being deformed under a squeeze load.
Dielectric Constant	The ability of a material to store an electrical charge.
Dielectric Strength	The amount of volts/mil required to cause an electrical “breakthrough”.
Dimensional Stability	Change in height, width, and shape when exposed to changes in temperature.
Dissipation Factor	The ability of a material to dissipate an electrical charge.
Durometer Hardness	The ability of a non-metallic material to resist indentation using a Shore tester.
Flammability Rating	The ability of a material to harbor a flame.
Flexural Modulus of Elasticity	The ratio of force to deformation when a material is being flexed or bent.
Flexural Strength	The resistance of a material to being bent or flexed.
Glass Transition Temperature(Tg)	The temperature at which crystalline materials change from solid to a rubbery state.
Heat Deflection Temperature	The temperature at which a material will bend a given distance when a given load is applied.
Izod Impact	The ability of a material to resist fracture at a machined “V” notch when hit with a swinging
Melting Point	The temperature at which a materials change from a solid to a liquid.
PV or Limiting PV	The ratio of simultaneous load and speed in relation to wear.
Rockwell Hardness	The ability of a material to resist indentation using a Rockwell Tester.
Shear Strength	The resistance of a material to being punched or sheared.
Specific Gravity	The ratio of the weight of an object, to the weight of the same volume of water.
Surface Resistivity	The ability of a material to impede the flow of electricity across its surface.
Tensile Elongation	The % a material will stretch as it is pulled in a slow stretch until it breaks.
Tensile Modulus Of Elasticity	The ratio of force to deformation when a material is being slowly pulled apart.
Tensile Strength	The resistance of a material to being slowly pulled apart.
Thermal Conductivity	The ability of a material to insulate changes in temperature.
Volume Resistivity	The ability of a material to impede the flow of electricity through itself.
Water Absorption	The ability of a material to absorb moisture.
Wear or “K” Factor	The ability to resist wear against steel.