SAE F-1 Wool Felt
also J314 F-1
SAE F-1 Wool Felt is a dense pressed wool felt classified under SAE J314, the firmest and lowest-compressibility grade in the wool felt family at about 0.32 g/cm³ with roughly 2.8 MPa tensile strength.
Reference datasheet — SAE F-1 Wool Felt is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
SAE F-1 Wool Felt tempers and conditions
SAE F-1 Wool Felt is supplied in 2 conditions, soft to hard.
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
F-1 FR | Choose for transit, aerospace interior or electrical enclosure padding where self-extinguishing behaviour is specified. | 2 | 35 | 0.05 W/m·K | ||
F-1 oil-saturated | Pick when the felt must store and meter lubricant (bearing wicks, spindle oilers, wiper rings) rather than seal dry. | 3 | 45 | 0.08 W/m·K |
Supply forms, finishes and certifications
Ways SAE F-1 Wool Felt is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
MP | F-1 MP | Surface finish |
STDDefault | F-1 standard | Standard supply |
What is SAE F-1 Wool Felt?
SAE F-1 Wool Felt is a dense pressed wool felt classified under SAE J314, the firmest and lowest-compressibility grade in the wool felt family at about 0.32 g/cm³ with roughly 2.8 MPa tensile strength. It is specified where a felt must hold shape under load while still wicking oil, and is supplied as sheet, roll, strip and cut washers in plain (STD), oil-impregnated (OIL), flame-retardant (FR) and mothproof (MP) conditions. Service is limited to about 100 °C, thermal conductivity is 0.052 W/m·K, and the material absorbs water and is attacked by strong acids and alkalis. For softer sealing and cushioning at similar density, SAE F-3 is the nearest alternative. SAE F-1 Wool Felt has a density of 0.32 g/cm³ (0.0116 lb/in³), lighter than 89% of natural material grades. SAE F-1 Wool Felt has a tensile strength of 3 MPa (0.406 ksi), weaker than 89% of natural material grades. Elongation at break is 40% and the elastic modulus is 0.01 GPa (0.0012 Msi).
What is SAE F-1 Wool Felt used for?
- polishing wheels
- seals
- wick applications
- cushioning pads
Advantages
- Ductile — tolerates forming and impact — 40%, better than 92% of natural material grades
- Lightweight — 0.32 g/cm³ (0.0116 lb/in³), better than 89% of natural material grades
Limitations
- Low stiffness — 0.01 GPa (0.0012 Msi), worse than 96% of natural material grades
- Poor heat conductor — 0.05 W/m·K (0.03 BTU/hr·ft·°F), worse than 94% of natural material grades
- High embodied carbon — 12 kg CO₂/kg, worse than 93% of natural material grades
SAE F-1 Wool Felt properties
Typical room-temperature values; bars are the position among natural material grades.
Physical2
SAE F-1 Wool Felt has a density of 0.32 g/cm³ (0.0116 lb/in³), lighter than 89% of natural material grades.
Mechanical4
SAE F-1 Wool Felt has a tensile strength of 3 MPa (0.406 ksi), weaker than 89% of natural material grades. Elongation at break is 40% and the elastic modulus is 0.01 GPa (0.0012 Msi).
Thermal4
SAE F-1 Wool Felt is rated for continuous service to 100°C (212 °F). It conducts heat at 0.05 W/m·K (0.03 BTU/hr·ft·°F), worse than 94% of natural material grades.
Electrical1
SAE F-1 Wool Felt has an electrical resistivity of 1×10⁹ Ω·m.
Chemical & Environmental1
Corrosion resistance is fair (45/100), better than 53% of natural material grades.
Sustainability4
Producing a kilogram of SAE F-1 Wool Felt takes about 63 MJ of energy and emits 12 kg of CO₂ — more than 89% of natural material grades. Typical recycled content is 0%.
Manufacturability1
SAE F-1 Wool Felt's machinability is excellent (85/100, better than 63% of natural material grades).
Common Calculations3
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Working with SAE F-1 Wool Felt
Is SAE F-1 Wool Felt easy to machine?
Die-cut, kiss-cut, waterjet or rotary-slit; keep blades sharp and support the felt — routing/turning fuzzes the edge.
Can SAE F-1 Wool Felt be welded?
Not weldable; join by sewing, stapling, or contact/pressure-sensitive adhesive with a scrim backing.
Can SAE F-1 Wool Felt be formed, bent or molded?
Can be steam-softened and compression-formed into washers, cones and channel seals; recovers ~80–90 % after moderate compression.
SAE F-1 Wool Felt chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| moisture (regain, as received)conditioned at 65 % RH; not a constituent of the dry felt | 0 – 12 | 8 |
| residual lanolin / processing oils | 0 – 1.5 | 0.5 |
| wool (new virgin fiber)SAE J314 F-grade felts of highest quality are all-new wool; no reprocessed fiber permitted in F-1 | ≥ 95 (balance) |
What surface finishes work on SAE F-1 Wool Felt?
Commonly impregnated with oil, wax, resin or FR/mothproof chemistry; no coating or plating is applicable.
Equivalent designations
Standards and trade names that resolve to SAE F-1 Wool Felt in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Trade names
- J314 F-1
How much does SAE F-1 Wool Felt cost?
SAE F-1 Wool Felt is a high-cost natural material ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
SAE F-1 Wool Felt — frequently asked
What is SAE F-1 Wool Felt used for?
SAE F-1 Wool Felt is typically used for polishing wheels, seals, wick applications and cushioning pads. In short: firmest SAE wool felt; low compressibility grade; holds oil for wicking.
What is the tensile strength of SAE F-1 Wool Felt?
SAE F-1 Wool Felt has a typical tensile strength of 3 MPa (0.406 ksi) — weaker than 89% of natural material grades. Strength varies by condition: see the 2 listed tempers.
Is SAE F-1 Wool Felt easy to machine?
Yes — machinability is rated excellent (85/100, better than 63% of natural material grades). Die-cut, kiss-cut, waterjet or rotary-slit; keep blades sharp and support the felt — routing/turning fuzzes the edge.
Can SAE F-1 Wool Felt be welded?
Not weldable; join by sewing, stapling, or contact/pressure-sensitive adhesive with a scrim backing.
What surface finishes work on SAE F-1 Wool Felt?
Commonly impregnated with oil, wax, resin or FR/mothproof chemistry; no coating or plating is applicable.
Can SAE F-1 Wool Felt be formed, bent or molded?
Can be steam-softened and compression-formed into washers, cones and channel seals; recovers ~80–90 % after moderate compression.
What is the maximum service temperature of SAE F-1 Wool Felt?
SAE F-1 Wool Felt is rated for continuous use to about 100°C (212 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does SAE F-1 Wool Felt cost?
SAE F-1 Wool Felt is a high-cost natural material ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- SAE J314 — Felt, Wool and Part Wool — SAE International (2012)
- ASTM D461 — Standard Test Methods for Felt — ASTM (2020)
- Pressed wool felt grade specifications (SAE F-series) — Industrial felt mills (2023)
- Eco-property data for wool fiber and felt — CES/Granta EduPack (2022)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.