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IR Rubber vs. CR Rubber

Both IR rubber and CR rubber are thermoset elastomers (rubber). There are 12 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is IR rubber and the bottom bar is CR rubber.

Metric UnitsUS Customary Units

Mechanical Properties

Elongation at Break, % 600
380
Tensile Strength: Ultimate (UTS), MPa 19
11

Thermal Properties

Glass Transition Temperature, °C -70
-45
Maximum Temperature: Autoignition, °C 300
410
Maximum Temperature: Decomposition, °C 300
350
Specific Heat Capacity, J/kg-K 1550
1120
Thermal Conductivity, W/m-K 0.14
0.19

Otherwise Unclassified Properties

Density, g/cm3 1.0
1.5
Limiting Oxygen Index (LOI), % 19
26

Common Calculations

Strength to Weight: Axial, points 5.6
1.9
Strength to Weight: Bending, points 17
7.1
Thermal Diffusivity, mm2/s 0.1
0.11