| These data were obtained by ASTM D-461 Test Methods, ASTM D-2475 Standards, and NTA Wool Felt Specifications. |
| F-26 Specification and Uses | |
| Commercial Standard Grade | 8R5 |
| SAE Number | F-26 |
| NTA Number | 17R2 |
| GENERAL PROPERTIES | |
|---|---|
| Wool Content (fiber basis) | min. 45% |
| Density (1") | 7.20 lbs/sq yd |
| Standard Thickness Range | 1/8" to 1" | fg
| Standard Width | 72" |
| Color | Gray |
| PHYSICAL PROPERTIES | |
| Specific Gravity | 17% |
| Therm. Cond. (70F) | 0.25 btu/hr/sq. ft./°F/in. |
| Thermal Expansion | 0 |
| Air Perm (1/16") | 100-200 cfm/sq ft/0.5"H2O |
| Liquid Absorption by volume |
>400% by weight (1.0 sp gr) 92 |
| Capillarity (wicking height, 575 SSU, 70F) | -- |
| Coef of Friction (1) | 0.37 |
| Vibration Absorption (2) static load bearing cap/unit area dynamic stress endurance |
Very low Very low |
| Noise Reduction Coef (1") | 0.65 |
| MECHANICAL PROPERTIES | |
| Tensile Strength (min) | -- psi |
| Elongation (100 psi) | -- % |
| Mullen Bursting Strength (1/8") | 25 psi |
| Split Resistance (min) | -- lb/2" width |
| Hardness Range | 5-15 Shore A |
| Compressibility (10% defl) | 1 psi |
| Recovery (within 1 min after 10% defl) | 99% |
| Abrasion Resistance (3) | Poor |
| CHEMICAL AND ENVIRONMENTAL PROPERTIES | |
| Effect of Sunlight and Oxidation | None |
| Solvent Resistance and Stability in Oil | Excellent |
| Acid Resistance, dilute concentration |
Fair Poor |
| Alkali Resistance, dilute concentration |
Fair Low |
| Temperature Range | -80 to +200 °F |
| TYPICAL USES | |
| Packing or padding when held between other materials; not recommended for mechanical use. | |