High Performance Plastic · High Performance Thermoplastic
PSU
PSU is a high performance polymer — high-heat steam resistant. Typical values: 70 MPa yield, 1.24 g/cm³, rated to 150 °C. Available for CNC machining, Sheet metal, Injection molding at FabDigit.
Properties
Typical room-temperature values in the Medical Grade condition. Metric first, imperial in gray. The bars show where PSU sits against the other 74 polymer grades in the catalog.
Datasheet
| Yield strength | 70 MPa10 ksi |
|---|---|
| Tensile strength | 75 MPa11 ksi |
| Hardness | 120 HRR |
| Density | 1.24 g/cm³0.045 lb/in³ |
| Specific strength (yield ÷ density) | 56 |
| Min service temp | -40 °C-40 °F |
| Max service temp | 150 °C302 °F |
| Electrical conductivity | < 0.001 % IACSinsulator |
| Machinability | Very good75 / 100 |
| Weldability | Excellent85 / 100 |
| Formability | Good60 / 100 |
| ISO 513 machining group | N |
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. PSU is highlighted; hover a dot for its name, or open the interactive family chart.
Manufacturability
The process limits FabDigit's quote engine applies to PSU. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Better75 / 100 |
|---|---|
| ISO material group | N.8 |
| Cutting speed (rough / finish) | 400 / 500 m/min |
| Minimum wall | 0.5 mm |
| Minimum internal radius | 1 mm |
| Drill depth limit | 10× diameter |
| Best surface (machined / polished) | Ra 0.8 / — |
| Hardenable after machining | No |
Sheet metal
| Formability | Better60 / 100 |
|---|---|
| Weldability | Better85 / 100 |
Injection molding
| Mold shrinkage | — |
|---|---|
| Wall thickness | — – — |
| Recommended draft | — |
| Pre-drying | — |
Conditions and tempers
How PSU 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 |
|---|---|---|---|---|---|
Medical GradeDefault Cert | Skin-contact and medical device housings | — | — | — | — |
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 PSU, 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 PSU
Coatings and treatments compatible with polymer on the processes PSU 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
Organic Coating
- Painting
Marking / Decoration
- Chemical Etching
- Dot Peen Marking
- Electro-chemical Etching
- Embossing / Debossing
- Hot Stamping
- In-Mold Labeling (IML)
- Ink Stamping
- Laser Marking
- Mechanical Engraving
- Pad Printing
- Vibro Engraving / Scribing
Metallization / Functional
- Chrome Plating (Plastic)
Equivalent designations
Standards and trade names that resolve to PSU in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Trade names
- Udel
- Also called
- Polysulfone
- Other
- PSU (Polysulfone)
Stock forms
Raw-material forms FabDigit sources PSU 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.