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ASTM-D 1056-91
SPONGE RUBBER CLASSIFICATION CHART
| Type | Class | Grade Number Pounds per square inches (PSI) required to deflect a sample 25% of its height. |
Suffix Suffix letters are used to indicate the tests met by the compounds. In a line call out, the numbers following the suffix letters indicate test parameters or the particular conditions related to these suffix numbers. |
|---|---|---|---|
| 1 = open-cell 2 = closed-cell |
A = Non Oil-resistant (Example: EPDM) B = Oil-resistant, low oil swelling (Example: Nitrile) C = Oil-resistant, medium oil swelling (Example: Neoprene) D = Resistant to extreme temperatures (Example: Silicone) |
0 = 2 PSI 1 = 2-5 PSI 2 = 5-9 PSI 3 = 9-13 PSI 4 = 13-17 PSI 5 = 17-25 PSI |
A = Heat Resistance B = Compression Set C = Ozone or Weather Resistance D = Compression-Deflection Resistance E = Fluid Resistance F = Low Temperature Resistance G = Tear Resistance J = Abrasion Resistance K = Adhesion L = Water Absorption M = Flammability Resistance N = Impact Resistance P = Staining Resistance R = Resilience W = Density Z = Special Requirements |
Line call out, example: ASTM D-1056-91 2C1= closed-cell, oil resistance; medium oil swelling, from 2 to 5 PSI.