PBT-GF30 GF30
Reinforced grade · default condition
GF30 = 30% glass fiber, natural / uncolored, unmodified
Standard structural grade: pick when you need stiffness, dimensional stability and HDT >200 °C without flame-retardant or weathering requirements.
Values for the GF30 condition
Other PBT-GF30 grades and fills
PBT-GF30 is listed in 13 conditions; see the grade overview at PBT-GF30.
- GF30-MF
- GF30-IM
- GF30-HFFR
- GF30-PTFE
- GF30-ESD
- GF30-FR-V0
- PBT/PC-GF30
- GF30-HR
- GF30-UV
- GF30-FDA
- GF30
- GF30-HS
- PBT/PET-GF30
Compare all 13 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
GF30 glass/mineral hybrid | Choose for flat, dimension-critical covers and housings where anisotropic shrinkage of pure GF causes warpage. | — | 100 | 2.5 | 84 Shore D |
elastomer impact-modified (toughened) | Pick for snap-fits, clips and cold-impact (-30 °C) duty where standard GF30 is too brittle. | — | 105 | 5 | 80 Shore D |
GF30 halogen-free FR | Pick where halogen-free / low-corrosivity electronics specs (RoHS-plus, IEC 61249) apply and high CTI is needed. | — | 110 | 2.2 | 86 Shore D |
GF30 + PTFE/silicone lubricated | Use for gears, sliders and bushings needing low friction and wear against steel while keeping GF stiffness. | — | 110 | 2 | 84 Shore D |
GF30 ESD / conductive | Pick for fuel-system, electronics-handling and explosion-risk parts needing controlled surface resistivity. | — | 110 | 2 | 86 Shore D |
brominated flame retardant, UL 94 V-0 | Choose for connectors, relays and switches needing UL 94 V-0 at 0.4–0.8 mm; accept higher density and slightly lower toughness. | — | 120 | 2.5 | — |
PBT/PC-GF30 blend | Pick for painted body/exterior parts and structural covers needing higher toughness than neat PBT-GF30; heat resistance is lower. | — | 120 | 4 | 84 Shore D |
hydrolysis-resistant (chain-extended / stabilized) | Specify for parts in hot water, coolant, humid pressure-cooker or steam-sterilization service where standard PBT hydrolyzes. | — | 125 | 3 | 85 Shore D |
UV/weather-stabilized (often black, laser-markable) | Choose for exterior automotive, e-mobility charging and solar-junction parts exposed to sunlight. | — | 128 | 2.8 | 85 Shore D |
GF30 food-contact / FDA-compliant compound | Specify for food-machinery, coffee/appliance and drinking-water components requiring FDA 21 CFR or EU 10/2011 declarations. | — | 128 | 3 | 85 Shore D |
GF30DefaultThis page 30% glass fiber, natural / uncolored, unmodified | Standard structural grade: pick when you need stiffness, dimensional stability and HDT >200 °C without flame-retardant or weathering requirements. | — | 130 | 3 | 85 Shore D |
heat-stabilized for long-term high-temperature air ageing | Use for under-hood or motor-adjacent parts held near 140–150 °C for thousands of hours. | — | 130 | 3 | 85 Shore D |
PBT/PET-GF30 blend | Use where glossier surfaces, higher HDT and lower resin cost matter and hotter molds (>100 °C) are acceptable. | — | 135 | 2.5 | 86 Shore D |
What is PBT-GF30 GF30?
PBT-GF30 GF30 is PBT-GF30 in the GF30 grade — standard structural grade: pick when you need stiffness, dimensional stability and HDT >200 °C without flame-retardant or weathering requirements. PBT-GF30 GF30 has a tensile strength of 130 MPa (18.9 ksi), stronger than 94% of polymer grades. Elongation at break is 3% and the elastic modulus is 10 GPa (1.45 Msi). PBT-GF30 GF30 has a density of 1.53 g/cm³ (0.0553 lb/in³), heavier than 89% of polymer grades. Its glass-transition temperature is 50°C (122 °F).
Advantages
- Stiff — 10 GPa (1.45 Msi), better than 95% of polymer grades
- Low moisture uptake — 0.06%, better than 82% of polymer grades
- Low, predictable mold shrinkage — 0.4%, better than 82% of polymer grades
- Tough — resists crack growth — 3.5 MPa·√m (3.19 ksi·√in), better than 81% of polymer grades
Limitations
- Heavy — 1.53 g/cm³ (0.0553 lb/in³), worse than 89% of polymer grades
- Limited formability — 10/100, worse than 87% of polymer grades
- Limited ductility — 3%, worse than 83% of polymer grades
- Hard to polish — 30/100, worse than 82% of polymer grades
PBT-GF30 GF30 properties
Typical room-temperature values for PBT-GF30 GF30; 26 are specific to this condition. Other listed values are PBT-GF30 reference data and may not represent this condition. Bars are the position among polymer grades.
Physical5
PBT-GF30 GF30 has a density of 1.53 g/cm³ (0.0553 lb/in³), heavier than 89% of polymer grades. Its glass-transition temperature is 50°C (122 °F).
Mechanical15
PBT-GF30 GF30 has a tensile strength of 130 MPa (18.9 ksi), stronger than 94% of polymer grades. Elongation at break is 3% and the elastic modulus is 10 GPa (1.45 Msi).
Thermal11
PBT-GF30 GF30 is rated for continuous service to 130°C (266 °F). It conducts heat at 0.25 W/m·K (0.144 BTU/hr·ft·°F), better than 72% of polymer grades. Thermal expansion is 25 µm/m·K (13.9 µin/in·°F).
Electrical7
PBT-GF30 GF30 is an electrical insulator with a dielectric strength of 30 kV/mm (762 V/mil) and a resistivity of 1×10¹⁴ Ω·m.
Chemical & Environmental3
Corrosion resistance is very good (82/100), better than 56% of polymer grades. UV resistance is poor.
Sustainability4
Producing a kilogram of PBT-GF30 GF30 takes about 85 MJ of energy and emits 4.4 kg of CO₂ — less than 79% of polymer grades. Typical recycled content is 5%.
Manufacturability8
PBT-GF30 GF30's machinability is good (55/100, worse than 64% of polymer grades); weldability fair (45/100); formability not recommended (10/100).
Common Calculations4
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with PBT-GF30 GF30
Is PBT-GF30 easy to machine?
Machines cleanly but the 30% glass is abrasive — use sharp carbide or PCD tools, high speed, light feed, air/mist cooling, and expect fiber pull-out on thin edges.
Can PBT-GF30 be welded?
Ultrasonic, laser, hot-plate, spin and IR welding all work; joint strength is typically 40–60% of base because fibers do not cross the weld line, so design energy directors/shear joints.
Can PBT-GF30 be formed, bent or molded?
Injection mold at 245–275 °C melt and 60–100 °C mold with pellets dried to <0.02% moisture; fast crystallization gives short cycles but flow/transverse shrinkage differs (0.4% vs ~0.9%), so gate to control warpage.
What surface finishes work on PBT-GF30?
Fiber read-through limits gloss; paintable with primer, laser-markable in black grades, and platable/metallizable only with vacuum or adhesion-promoted processes — no chemical plating like ABS.
PBT-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 fiberchopped E-glass, 10–13 µm, silane sized | 29 – 31 | 30 |
| additives (heat/hydrolysis stabilizer, lFR/UV/impact packages add 5–20% in modified variants | 0.3 – 2 | 1 |
| polybutylene terephthalate (PBT)matrix resin, may contain PET or PC in blend variants | ≥ 65 (balance) | — |
PBT-GF30 GF30 — frequently asked
What is PBT-GF30 GF30 used for?
PBT-GF30 GF30 is typically used for automotive connector housings, structural electrical enclosures, sensor housings and gear and bearing cages. In short: default structural PBT; stiff, dimensionally stable connector resin; fast-cycling reinforced polyester.
What is the tensile strength of PBT-GF30 GF30?
PBT-GF30 GF30 has a typical tensile strength of 130 MPa (18.9 ksi) — stronger than 94% of polymer grades. Strength varies by condition: see the 13 listed tempers.
Is PBT-GF30 GF30 easy to machine?
Reasonably — machinability is rated good (55/100, worse than 64% of polymer grades). Machines cleanly but the 30% glass is abrasive — use sharp carbide or PCD tools, high speed, light feed, air/mist cooling, and expect fiber pull-out on thin edges.
Can PBT-GF30 GF30 be welded?
With care — weldability is rated fair (45/100). Ultrasonic, laser, hot-plate, spin and IR welding all work; joint strength is typically 40–60% of base because fibers do not cross the weld line, so design energy directors/shear joints.
What surface finishes work on PBT-GF30 GF30?
Fiber read-through limits gloss; paintable with primer, laser-markable in black grades, and platable/metallizable only with vacuum or adhesion-promoted processes — no chemical plating like ABS.
Can PBT-GF30 GF30 be formed, bent or molded?
Injection mold at 245–275 °C melt and 60–100 °C mold with pellets dried to <0.02% moisture; fast crystallization gives short cycles but flow/transverse shrinkage differs (0.4% vs ~0.9%), so gate to control warpage.
What is the maximum service temperature of PBT-GF30 GF30?
PBT-GF30 GF30 is rated for continuous use to about 130°C (266 °F), and briefly to 190°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ISO 7792-1/-2 Plastics — Thermoplastic polyester (TP) moulding and extrusion materials — ISO (2012)
- ASTM D5927 Standard Specification for Thermoplastic Polyester (TPES) Materials — ASTM (2020)
- ISO 527-2 / ISO 178 / ISO 75-2 / ISO 180 test methods — ISO (2019)
- UL 94 Tests for Flammability of Plastic Materials — UL Solutions (2021)
- CAMPUS plastics datasheets — PBT-GF30 grades — CWFG / CAMPUS consortium (2024)
- Ultradur B4300 G6 / B4406 G6 product data — BASF (2023)
- Celanex 2300GV1/30 product data — Celanese (2023)
- Crastin SK645FS / HR grades product data — DuPont (Celanese) (2022)
- Valox 420 / 420SEO product data — SABIC (2022)
- ASM Engineered Materials Handbook Vol. 2 — Engineering Plastics — ASM International (1988)
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.