SAE FA-1 Synthetic-Wool Blend Felt FR (FA-1 FR)
Flame-retardant grade
also J314 FA-1
Use where rail/transit or appliance specs require self-extinguishing acoustic or sealing felt.
Values for the FR condition
Other SAE FA-1 Synthetic-Wool Blend Felt tempers and conditions
SAE FA-1 Synthetic-Wool Blend Felt is listed in 2 conditions; see the grade overview at SAE FA-1 Synthetic-Wool Blend Felt.
- OIL
- FR
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
FA-1 oil-saturated | Pick for self-lubricating bearing wipers, spindle oil wicks and way-wipers where the felt must meter oil. | — | 1 | 50 | — | 0.09 W/m·K |
FRThis page FA-1 FR | Use where rail/transit or appliance specs require self-extinguishing acoustic or sealing felt. | — | 1 | 40 | — | 0.05 W/m·K |
What is SAE FA-1 Synthetic-Wool Blend Felt FR?
SAE FA-1 Synthetic-Wool Blend Felt FR is SAE FA-1 Synthetic-Wool Blend Felt in the FR grade — use where rail/transit or appliance specs require self-extinguishing acoustic or sealing felt. SAE FA-1 Synthetic-Wool Blend Felt FR has a tensile strength of 1 MPa (0.174 ksi), weaker than 96% of natural material grades. Elongation at break is 40% and the elastic modulus is 0 GPa (6.53×10⁻⁴ Msi). SAE FA-1 Synthetic-Wool Blend Felt FR has a density of 0.32 g/cm³ (0.0116 lb/in³), lighter than 89% of natural material grades.
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
- High service temperature — 120°C (248 °F), better than 79% of natural material grades
Limitations
- Low stiffness — 0 GPa (6.53×10⁻⁴ Msi), worse than 98% of natural material grades
- Poor heat conductor — 0.05 W/m·K (0.0312 BTU/hr·ft·°F), worse than 89% of natural material grades
- High embodied carbon — 8 kg CO₂/kg, worse than 87% of natural material grades
SAE FA-1 Synthetic-Wool Blend Felt FR properties
Typical room-temperature values for SAE FA-1 Synthetic-Wool Blend Felt FR; 11 are specific to this condition. Other listed values are SAE FA-1 Synthetic-Wool Blend Felt reference data and may not represent this condition. Bars are the position among natural material grades.
Physical2
SAE FA-1 Synthetic-Wool Blend Felt FR has a density of 0.32 g/cm³ (0.0116 lb/in³), lighter than 89% of natural material grades.
Mechanical5
SAE FA-1 Synthetic-Wool Blend Felt FR has a tensile strength of 1 MPa (0.174 ksi), weaker than 96% of natural material grades. Elongation at break is 40% and the elastic modulus is 0 GPa (6.53×10⁻⁴ Msi).
Thermal4
SAE FA-1 Synthetic-Wool Blend Felt FR is rated for continuous service to 120°C (248 °F). It conducts heat at 0.05 W/m·K (0.0312 BTU/hr·ft·°F), worse than 89% of natural material grades.
Electrical1
SAE FA-1 Synthetic-Wool Blend Felt FR has an electrical resistivity of 1×10⁷ Ω·m.
Chemical & Environmental1
Corrosion resistance is fair (50/100), better than 63% of natural material grades.
Sustainability4
Producing a kilogram of SAE FA-1 Synthetic-Wool Blend Felt FR takes about 90 MJ of energy and emits 8 kg of CO₂ — more than 94% of natural material grades. Typical recycled content is 20%.
Manufacturability1
SAE FA-1 Synthetic-Wool Blend Felt FR's machinability is very good (82/100, better than 53% of natural material grades).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with SAE FA-1 Synthetic-Wool Blend Felt FR
Is SAE FA-1 Synthetic-Wool Blend Felt easy to machine?
Steel-rule die cutting, clicker press, knife or abrasive waterjet; avoid dry high-speed routing (fiber scorch and fuzzing).
Can SAE FA-1 Synthetic-Wool Blend Felt be welded?
Not weldable as such; high-synthetic blends can be ultrasonically or heat-bonded, otherwise adhesive-bond or sew.
Can SAE FA-1 Synthetic-Wool Blend Felt be formed, bent or molded?
Wet-and-press or steam-form into washers, cones and seals; recovers most thickness after compression unless resin-set.
What surface finishes work on SAE FA-1 Synthetic-Wool Blend Felt?
Can be resin- or latex-impregnated, oil-saturated, flame-retardant or mothproof treated, and adhesive-backed with PSA.
SAE FA-1 Synthetic-Wool Blend 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 |
|---|---|---|
| wool fibervirgin/graded wool per SAE J314 FA blend | 50 – 75 | 60 |
| mothproofing / processing agentsresidual finishes, sizing, lubricant | 0 – 1.5 | 0.5 |
| polyester/nylon/rayon fibersynthetic blend component giving chemical & abrasion resistance | ≥ 25 (balance) | — |
SAE FA-1 Synthetic-Wool Blend Felt FR — frequently asked
What is SAE FA-1 Synthetic-Wool Blend Felt FR used for?
SAE FA-1 Synthetic-Wool Blend Felt FR is typically used for oil seals, polishing buffs, sound insulation and gasket material. In short: better chemical resistance; higher temperature than wool; blended-fiber SAE felt.
What is the tensile strength of SAE FA-1 Synthetic-Wool Blend Felt FR?
SAE FA-1 Synthetic-Wool Blend Felt FR has a typical tensile strength of 1 MPa (0.174 ksi) — weaker than 96% of natural material grades. Strength varies by condition: see the 2 listed tempers.
Is SAE FA-1 Synthetic-Wool Blend Felt FR easy to machine?
Yes — machinability is rated very good (82/100, better than 53% of natural material grades). Steel-rule die cutting, clicker press, knife or abrasive waterjet; avoid dry high-speed routing (fiber scorch and fuzzing).
Can SAE FA-1 Synthetic-Wool Blend Felt FR be welded?
Not weldable as such; high-synthetic blends can be ultrasonically or heat-bonded, otherwise adhesive-bond or sew.
What surface finishes work on SAE FA-1 Synthetic-Wool Blend Felt FR?
Can be resin- or latex-impregnated, oil-saturated, flame-retardant or mothproof treated, and adhesive-backed with PSA.
Can SAE FA-1 Synthetic-Wool Blend Felt FR be formed, bent or molded?
Wet-and-press or steam-form into washers, cones and seals; recovers most thickness after compression unless resin-set.
What is the maximum service temperature of SAE FA-1 Synthetic-Wool Blend Felt FR?
SAE FA-1 Synthetic-Wool Blend Felt FR is rated for continuous use to about 120°C (248 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- SAE J314 — Felt, Wool and Part-Wool — SAE International (2016)
- ASTM D461 — Standard Test Methods for Felt — ASTM International (2018)
- ASM Engineered Materials Handbook — Nonmetallic Sealing & Gasket Materials — ASM International (1988)
- Industrial pressed felt grade sheets (SAE F/FA series) — Felt manufacturers (Sutherland Felt / Hoffman / ) (2024)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.