F-55 Specification and UsesThese data were obtained by ASTM D-461 Test Methods, ASTM
D-2475 Standards, and NTA Wool Felt Specifications.
Commercial Standard Grade 12R3XSAE Number F-55NTA Number 26R3
GENERAL PROPERTIESWool Content (fiber basis) min. 75%Density (1”) 12.00 lbs/sq ydStandard Thickness Range 1/16” to 3/32”Standard Width 60” to 72”Color Gray/Black
PHYSICAL PROPERTIESSpecific Gravity 26%Therm. Cond. (70F) 0.30 btu / hr / sq ft / °F / in.Thermal Expansion 0Air Perm (1/16”) 20-40 cfm/sq ft/0.5” H2OLiquid Absorptionby volume
>225% by weight (1.0 sp gr)81
Capillarity (wicking height, 575 SSU, 70F) 3.00Coefficient of Friction (1) 0.37** Vibration Absorption (2)static load bearing cap/unit areaDynamic stress endurance
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Noise Reduction Coef (1”) 0.58MECHANICAL PROPERTIES
Tensile Strength (min) 200 psiElongation (100 psi) 25 %Mullen Bursting Strength (1/8”) 200 psiSplit Resistance (min) -- lb/2” widthHardness Range -- Shore ACompressibility (10% defl) -- psiRecovery (within 1 min after 10% defl) 99%Abrasion Resistance (3) Good
CHEMICAL AND ENVIRONMENTAL PROPERTIESEffect of Sunlight and Oxidation NoneSolvent Resistance and Stability in Oil ExcellentAcid Resistance, diluteConcentrated
GoodFair
Alkali Resistance, diluteConcentrated
FairLow
Temperature Range -80 to +200°FTYPICAL USES
Antisqueak strips, antidrumming and insulation lining laminated to other materials.
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F-55 Density and Thicknesswww.multifeutre.com
S.A.E. Specification Number F-55A.S.T.M. Federal and Felt Association Type and Grade Number
12R3X
Density Percent Specific Gravity 25.6Actual (1) Wool Content (Min.) Percent 75Carbon Tetrachloride Soluble (Max.) Percent 4.0Water Soluble (Max.) Percent 4.0Carbon Tetrachloride & Water Soluble (Max.) Percent 8.0Ash (Max.) Percent 3.0Tensile Strength (Min.) PSI 200Splitting Resistance (Min.) Lbs. Per 2” Width --Trade Designation LiningColor Gray or BlackStandard Width Inches 72
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THICKNESS WEIGHTNominal
(inch)Limits(inch)
Nominal(lbs/sq. yd.)
Limits (lbs/sq. yd.)
1/16 0.056 - 0.070 0.750 0.712 - 0.7883/32 0.087 - 0.101 1.125 1.087 - 1.163
