PSU-GF30 GF30-PTFE
Additive grade
ASTM D6394
GF30-PTFE = gF30 + PTFE lubricated bearing grade
Select for high-temperature sliding parts (bushings, thrust washers, valve seats) where low wear rate matters more than peak strength.
Values for the GF30-PTFE condition
Other PSU-GF30 grades and fills
PSU-GF30 is listed in 6 conditions; see the grade overview at PSU-GF30.
Compare all 6 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
GF30-PTFEThis page GF30 + PTFE lubricated bearing grade | Select for high-temperature sliding parts (bushings, thrust washers, valve seats) where low wear rate matters more than peak strength. | — | 85 | 2 | 88 HRM |
GF30 extruded / compression-molded stock shape | Semi-finished stock for machined prototypes and low-volume parts; properties are slightly lower and less anisotropic than molded test bars. | — | 90 | 3 | 90 HRM |
Flame-retardant, UL 94 V-0 rated | Pick for electrical housings, connectors and rail/aerospace interiors where a V-0 listing at thin wall is mandatory. | — | 100 | 2.2 | 93 HRM |
GF30 black, UV / weather stabilized | Choose for outdoor or lamp-adjacent parts where PSU's natural yellowing and surface chalking must be delayed. | — | 105 | 2.3 | 92 HRM |
GF30Default 30% glass-fiber reinforced injection molding grade | Standard choice when maximum stiffness, creep resistance and dimensional stability are needed in molded PSU parts up to ~165 °C. | — | 108 | 2.5 | 92 HRM |
Medical / NSF-listed grade for repeated steam sterilization | Use where USP Class VI, ISO 10993, FDA food-contact or NSF-61 potable-water documentation and lot traceability are required. | — | 108 | 2.5 | 92 HRM |
What is PSU-GF30 GF30-PTFE?
PSU-GF30 GF30-PTFE is PSU-GF30 in the GF30-PTFE grade — select for high-temperature sliding parts (bushings, thrust washers, valve seats) where low wear rate matters more than peak strength. PSU-GF30 GF30-PTFE has a tensile strength of 85 MPa (12.3 ksi), stronger than 85% of polymer grades. Elongation at break is 2% and the elastic modulus is 7.8 GPa (1.13 Msi). PSU-GF30 GF30-PTFE has a density of 1.58 g/cm³ (0.0571 lb/in³), heavier than 92% of polymer grades. Its glass-transition temperature is 185°C (365 °F). GF30 is the default condition FabDigit quotes; GF30-PTFE is available on request or by drawing note.
Advantages
- Stiff — 7.8 GPa (1.13 Msi), better than 91% of polymer grades
- Conducts heat well — 0.32 W/m·K (0.185 BTU/hr·ft·°F), better than 88% of polymer grades
- Low, predictable mold shrinkage — 0.35%, better than 86% of polymer grades
- High service temperature — 160°C (320 °F), better than 81% of polymer grades
Limitations
- Limited ductility — 2%, worse than 95% of polymer grades
- Heavy — 1.58 g/cm³ (0.0571 lb/in³), worse than 92% of polymer grades
- Limited formability — 10/100, worse than 87% of polymer grades
- Difficult to weld — 10/100, worse than 82% of polymer grades
- Hard to polish — 30/100, worse than 82% of polymer grades
PSU-GF30 GF30-PTFE properties
Typical room-temperature values for PSU-GF30 GF30-PTFE; 25 are specific to this condition. Other listed values are PSU-GF30 reference data and may not represent this condition. Bars are the position among polymer grades.
Physical4
PSU-GF30 GF30-PTFE has a density of 1.58 g/cm³ (0.0571 lb/in³), heavier than 92% of polymer grades. Its glass-transition temperature is 185°C (365 °F).
Mechanical14
PSU-GF30 GF30-PTFE has a tensile strength of 85 MPa (12.3 ksi), stronger than 85% of polymer grades. Elongation at break is 2% and the elastic modulus is 7.8 GPa (1.13 Msi).
Thermal11
PSU-GF30 GF30-PTFE is rated for continuous service to 160°C (320 °F). It conducts heat at 0.32 W/m·K (0.185 BTU/hr·ft·°F), better than 88% of polymer grades. Thermal expansion is 22 µm/m·K (12.2 µin/in·°F).
Electrical7
PSU-GF30 GF30-PTFE is an electrical insulator with a dielectric strength of 19 kV/mm (482.6 V/mil) and a resistivity of 1×10¹³ Ω·m.
Chemical & Environmental3
Corrosion resistance is excellent (87/100), better than 72% of polymer grades. UV resistance is poor.
Sustainability3
Producing a kilogram of PSU-GF30 GF30-PTFE takes about 130 MJ of energy and emits 7.5 kg of CO₂ — more than 77% of polymer grades. Typical recycled content is 0%.
Manufacturability8
PSU-GF30 GF30-PTFE's machinability is good (55/100, worse than 64% of polymer grades); weldability not recommended (10/100); formability not recommended (10/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with PSU-GF30 GF30-PTFE
Is PSU-GF30 easy to machine?
Machines cleanly with sharp carbide or PCD tooling and generous air/mist cooling; the 30% glass load dulls HSS quickly and residual molding stress can craze — anneal near 165 °C before heavy cuts.
Can PSU-GF30 be welded?
Ultrasonic, hot-plate and vibration welding work but joint strength is limited by fiber discontinuity (typ. 40–60% of base); solvent bonding with methylene-chloride-type cements is possible on unstressed joints only.
Can PSU-GF30 be formed, bent or molded?
Dry to <0.02% moisture (≈3–4 h at 135–150 °C), mold at 340–370 °C melt with 120–160 °C tools; use generous gates and hardened/nitrided steel for abrasion, and expect 0.15–0.45% direction-dependent shrinkage.
What surface finishes work on PSU-GF30?
Fiber-rich surface gives a matte, slightly rough finish that resists high gloss; paints and adhesives need corona or abrasion pretreatment, and electroless plating is possible only on specially etched/primed compounds.
PSU-GF30 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 |
|---|---|---|
| glass fibershort chopped E-glass, silane sized for sulfone matrix | 29 – 31 | 30 |
| additives (pigment, heat stabilizer, prograde dependent; FR grades add halogen-free/phosphorus flame retardant | 0 – 2 | 0.5 |
| bisphenol-A polysulfone (PSU) resinamorphous sulfone polymer matrix, ASTM D6394 type PSU | ≥ 68 (balance) | — |
PSU-GF30 GF30-PTFE — frequently asked
What is PSU-GF30 GF30-PTFE used for?
PSU-GF30 GF30-PTFE is typically used for high-temperature electrical parts, pump and valve components, precision structural housings and under-hood automotive parts. In short: stiffest PSU grade; lowest expansion in family; highly abrasive to tooling.
What is the tensile strength of PSU-GF30 GF30-PTFE?
PSU-GF30 GF30-PTFE has a typical tensile strength of 85 MPa (12.3 ksi) — stronger than 85% of polymer grades. Strength varies by condition: see the 6 listed tempers.
Is PSU-GF30 GF30-PTFE easy to machine?
Reasonably — machinability is rated good (55/100, worse than 64% of polymer grades). Machines cleanly with sharp carbide or PCD tooling and generous air/mist cooling; the 30% glass load dulls HSS quickly and residual molding stress can craze — anneal near 165 °C before heavy cuts.
Can PSU-GF30 GF30-PTFE be welded?
Not readily — weldability is rated not recommended (10/100). Ultrasonic, hot-plate and vibration welding work but joint strength is limited by fiber discontinuity (typ. 40–60% of base); solvent bonding with methylene-chloride-type cements is possible on unstressed joints only.
What surface finishes work on PSU-GF30 GF30-PTFE?
Fiber-rich surface gives a matte, slightly rough finish that resists high gloss; paints and adhesives need corona or abrasion pretreatment, and electroless plating is possible only on specially etched/primed compounds.
Can PSU-GF30 GF30-PTFE be formed, bent or molded?
Dry to <0.02% moisture (≈3–4 h at 135–150 °C), mold at 340–370 °C melt with 120–160 °C tools; use generous gates and hardened/nitrided steel for abrasion, and expect 0.15–0.45% direction-dependent shrinkage.
What is the maximum service temperature of PSU-GF30 GF30-PTFE?
PSU-GF30 GF30-PTFE is rated for continuous use to about 160°C (320 °F), and briefly to 190°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ASTM D6394 — Standard Specification for Sulfone Plastics (SP) — ASTM International (2022)
- Udel PSU GF-130 / glass-reinforced polysulfone product data — Solvay Specialty Polymers (2023)
- CAMPUS plastics datasheets — PSU-GF30 injection molding grades — CWFG / CAMPUS consortium (2024)
- Engineered Materials Handbook, Vol. 2: Engineering Plastics — ASM International (1988)
- TECASON S stock shape (PSU) technical data — Ensinger (2023)
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.