SAE Specification Chart *
| Commercial Standard Grade | 16R1 | 16R1X | 16R2 | 16R3 | 16R3X | 12R1 | 12R2 | 12R3 | 12R3X | 9R1 | 9R2 | 9R3 | 9R4 | 9R5 | 8R5 |
| SAE Number | F-1 | F-50 | F-2 | F-3 | F-51 | F-5 | F-6 | F-7 | F-55 | F-10 | F-11 | F-12 | F-13 | F-15 | F-26 |
| NTA Number | 34R1 | 34R1 | 34R2 | 34R3 | 34R3 | 26R1 | 26R2 | 26R3 | 26R3 | 18R1 | 18R2 | --- | 18R3 | --- | 17R2 |
| General Properties | |||||||||||||||
| Wool Content (fiber basis) min. % | 95 | 95 | 90 | 85 | 92 | 95 | 87 | 80 | 75 | 95 | 87 | 85 | 75 | 55 | 45 |
| Density (1"), Lbs./Sq Yd | 16 | 15.6 | 16 | 15.6 | 15.6 | 12.24 | 12.24 | 12.24 | 12 | 8.48 | 8.48 | 8.48 | 8.48 | 8.48 | 7.2 |
| Standard Thickness Range, in. | 1/8 to 1 | 3/64 to 3/32 | 1/8 to 1 | 1/8 to 1 | 3/64 to 3/32 | 1/8 to 1 | 1/8 to 1 | 1/8 to 1 | 1/16 to 3/32 | 1/8 to 1 | 1/8 to 1 | 1/8 to 1 | 1/8 to 1 | 1/8 to 1 | 1/8 to 1 |
| Standard Width, in. | 60 | 60 or 72 | 60 | 60 | 60 or 72 | 60 | 60 or 72 | 72 | 60 or 72 | 72 | 72 | 72 | 72 | 72 | 72 |
| Color | white | white | any but gray or black | gray | gray | white | gray | gray | gray/black | white | gray | gray | gray | gray | gray |
| Physical Properties | |||||||||||||||
| Specific Gravity (%) | 34 | 34 | 34 | 34 | 34 | 26 | 26 | 26 | 26 | 18 | 18 | 18 | 18 | 18 | 17 |
| Therm. Cond. (70F) btu/hr/sq ft/F/in. | 0.36 | 0.32 | 0.36 | 0.35 | 0.32 | 0.3 | 0.3 | 0.3 | 0.3 | 0.3 | 0.24 | 0.24 | 0.24 | 0.24 | 0.25 |
| Thermal Expansion | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
| Air Perm (1/16"), cfm/sq ft/0.5" H2) | 10 - 30 | 15 - 25 | 10 - 30 | 15 - 35 | 15 - 40 | 20 - 50 | 20 - 50 | 20 - 50 | 20 - 50 | 75 - 150 | 75 - 150 | 75 - 150 | 75 - 150 | 75 - 150 | 100 - 200 |
| Liquid Absorption, % by weight (1.0 sp gr) | >175 | >180 | >175 | >190 | >170 | >250 | >225 | >225 | >225 | >400 | >375 | >350 | >350 | >350 | >400 |
| by volume | 74 | 75 | 74 | 76 | 75 | 80 | 80 | 80 | 81 | 88 | 88 | 88 | 88 | 88 | 92 |
| Capillarity (wicking height, 575 SSU, 70F) in. | 4 | 4 | 4 | 4 | 4 | 3 | 3 | 3 | 3 | 2.5 | 2.5 | 2.5 | 2.5 | 2.5 | --- |
| Coef of Friction Vibration Absorption | 0.37 | 0.37 | 0.37 | 0.37 | 0.37 | 0.37 | 0.37 | 0.37 | 0.37 | 0.37 | 0.37 | 0.37 | 0.37 | 0.37 | 0.37 |
| Static load bearing cap/unit area | high | --- | high | high | --- | medium | medium | medium | --- | low | low | low | low | low | very low |
| dynamic stress endurance | high | --- | high | high-med. | --- | high | high | medium | --- | high | high-med | medium | low | low | very low |
| Noise Reduction Coef (1") | 0.5 | 0.55 | 0.5 | 0.52 | 0.55 | 0.58 | 0.58 | 0.58 | 0.58 | 0.58 | 0.64 | 0.64 | 0.64 | 0.64 | 0.65 |
| Mechanical Properties | |||||||||||||||
| Tensile Strength (min), psi | 500 | 500 | 500 | 400 | 300 | 400 | 275 | 250 | 200 | 225 | 200 | 100 | 75 | 75 | --- |
| Elongation (100 psi), 100% | 13 | 8 | 14 | 16 | 9 | 16 | 18 | 21 | 25 | 33 | 35 | 35 | 37 | 39 | --- |
| Mullen Bursting Strength (1/8"), psi | 250 | 225 | 225 | 200 | 225 | 175 | 150 | 125 | 200 | 75 | 60 | 55 | 50 | 40 | 25 |
| Split Resistance (min), lb/2" width | 33 | --- | 28 | 22 | --- | 18 | 16 | 12 | --- | 8 | 6 | 3 | 2 | 2 | --- |
| Hardness Range, Shore A | 30 - 40 | --- | 30 - 40 | 30 - 40 | --- | 20 - 30 | 20 - 30 | 20 - 30 | --- | 15 - 25 | 15 - 25 | 15 - 25 | 15 - 25 | 15 - 25 | 5 - 15 |
| Compressibility 10% defl), psi | 21 | --- | 21 | 13 | --- | 6 | 6 | 6 | --- | 4 | 4 | 3 | 3 | 3 | 1 |
| Recovery (within 1 min after 10% defl) % | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 | 99 |
| Abrasion Resistance | excellent | excellent | excellent | excellent | excellent | good | good | good | good | fair | fair | fair | fair | fair | poor |
| Chemical and Environmental Properties | |||||||||||||||
| Effect of Sunlight and Oxidation | none | none | none | none | none | none | none | none | none | none | none | none | none | none | none |
| Solvent Resistance and Stability in Oil | excellent | excellent | excellent | excellent | excellent | excellent | excellent | excellent | excellent | excellent | excellent | excellent | excellent | excellent | excellent |
| Acid Resistance, dilute | excellent | excellent | excellent | excellent | excellent | excellent | excellent | good | good | excellent | excellent | good | fair | fair | fair |
| concentrated | good-fair | fair-good | good-fair | good-fair | fair-good | good-fair | good-fair | fair | fair | fair-good | fair-good | fair-good | fair | fair | poor |
| Alkali Resistance, dilute | fair | fair | fair | fair | fair | fair | fair | fair | fair | fair | fair | fair | fair | fair | fair |
| concentrated | low | low | low | low | low | low | low | low | low | low | low | low | low | low | low |
| Temperature Range, F | -80 to 200 | -80 to 200 | -80 to 200 | -80 to 200 | -80 to 200 | -80 to 200 | -80 to 200 | -80 to 200 | -80 to 200 | -80 to 200 | -80 to 200 | -80 to 200 | -80 to 200 | -80 to 200 | -80 to 200 |
* Please Note: The above information has been carefully reviewed to be as reliable as possible. However, due to the diversity of felt applications we cannot guarantee its accuracy, and urge you to make your own tests to determine the suitability of a given felt material.
Special Orders normally require a 3-4 week lead time and a manufacturing minimum. Items designated as in-stock are normally inventoried, but may occasionally be in the process of being produced, thus requiring a 3-4 week lead time.
