Engineering Plastic · Engineering Thermoplastic
PBT
PBT is an engineering polymer — stronger precise pbt. Typical values: 55 MPa yield, 1.31 g/cm³, rated to 120 °C. Available for Injection molding at FabDigit.
Properties
Typical room-temperature values in the Unfilled condition. Metric first, imperial in gray. The bars show where PBT sits against the other 74 polymer grades in the catalog.
Datasheet
| Yield strength | 55 MPa8 ksi |
|---|---|
| Tensile strength | 60 MPa9 ksi |
| Hardness | 115 HRR |
| Density | 1.31 g/cm³0.047 lb/in³ |
| Specific strength (yield ÷ density) | 42 |
| Min service temp | -20 °C-4 °F |
| Max service temp | 120 °C248 °F |
| Electrical conductivity | < 0.001 % IACSinsulator |
| Machinability | Excellent85 / 100 |
| Weldability | Very good70 / 100 |
| Formability | Fair40 / 100 |
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Against other polymer grades
Strength versus weight in the polymer family
Yield strength against density for every polymer grade FabDigit runs. PBT is highlighted; hover a dot for its name, or open the interactive family chart.
Manufacturability
The process limits FabDigit's quote engine applies to PBT. Design inside these and the part quotes instantly; outside them it routes to an engineer.
Injection molding
| Mold shrinkage | — |
|---|---|
| Wall thickness | — – — |
| Recommended draft | — |
| Pre-drying | — |
Conditions and tempers
How PBT is supplied and what each state is for. The default is what FabDigit quotes unless your drawing says otherwise.
| Condition | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
UnfilledDefault Grade Modifier | Tougher and cheaper than filled — snap fits, housings, wear parts | — | — | — | — |
GF15 15% Glass Fiber (GF15) | Light stiffening — covers and brackets under modest load | — | — | — | — |
FR V-0 UL94 V-0 Flame Rated | Self-extinguishing — required in most electronics enclosures | — | — | — | — |
GF30 30% Glass Fiber (GF30) | The structural default — mounts, housings, gears under sustained load | — | — | — | — |
Heat treatment and post-processing
Operations FabDigit's suppliers routinely run on PBT, ranked by how often they make sense for this grade.
Post-processing
| Manual Deburr | Deburrstandard |
|---|---|
| Edge Break (0.5mm) | Deburr |
| Heat-Stake Insert | Assembly |
| Ultrasonic Insert | Assembly |
| Laser Engrave | Marking |
| Press-fit Insert | Assembly |
| Silk Screen | Marking |
| CMM Inspection | Inspection |
| FAI Report | Inspection |
| Individual Bag | Packaging |
Surface finishes for PBT
Coatings and treatments compatible with polymer on the processes PBT runs on. Pick them in the quote configurator or call them out on the drawing.
Injection Molding Coating
- EMI Shielding Coating
- Soft Touch Coating
- Spray Painting
- UV Coating
Marking / Decoration
- Chemical Etching
- Embossing / Debossing
- Hot Stamping
- In-Mold Labeling (IML)
- Ink Stamping
- Laser Marking
- Pad Printing
Metallization / Functional
- Chrome Plating (Plastic)
Equivalent designations
Standards and trade names that resolve to PBT in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Trade names
- CrastinPocanUltradurValox
- Also called
- Polybutylene Terephthalate
Stock forms
Raw-material forms FabDigit sources PBT in.
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.