MECHANICAL

Rubbers

 Date Published: March 18, 2012 Last Modified: March 18, 2012

Overview

The hardness of most rubbers is specified using the Shore A scale (while the Shore D scale is used for harder materials). There are formulas (Wikipedia’s version, 3D Vision’s version) which gives an equation to convert Shore A hardness values into a Youngs Modulus, useful when you want to calculate the force required to compress the rubber by a certain amount. Each version of the equation gives different results, so treat the values with caution.

Nitrile Rubber

Nitrile is has a better resistance to fuel than Neoprene. It is also slightly more expensive (see the Price Guide). Unique property is that you can get it in white

Stats

P = poor, F = fair, G = good, E = excellent

PropertyValue
Hardness (Shore A)60
Usable Temperature Range (C)-40 to 101.7
Max Tensile Strength (MPa)7.0 to 24.6
AbrasionG
Tear ResistanceF
Electrical InsulationP
Flame ResistanceP
Ozone ResistanceF
UV ResistanceG
Acid ResistanceG
Solvent ResistanceP
Oil ResistanceE

1.5225.69
3.0387.71
4.5668.37
6775.43
101133.23