Clear Plastic · Polyurethane Casting Resin
PX521
PX521 is a clear polymer — uv-stable outdoor resin. Typical values: 40 MPa yield, 1.18 g/cm³, rated to 80 °C. Available for Injection molding, 3D printing at FabDigit.
Properties
Typical room-temperature values in the UV Resistant condition. Metric first, imperial in gray. The bars show where PX521 sits against the other 74 polymer grades in the catalog.
Datasheet
| Yield strength | 40 MPa6 ksi |
|---|---|
| Tensile strength | 55 MPa8 ksi |
| Hardness | 80 HRM |
| Density | 1.18 g/cm³0.043 lb/in³ |
| Specific strength (yield ÷ density) | 34 |
| Min service temp | -20 °C-4 °F |
| Max service temp | 80 °C176 °F |
| Electrical conductivity | < 0.001 % IACSinsulator |
| Machinability | Fair40 / 100 |
| Weldability | Not recommended5 / 100 |
| Formability | Not recommended5 / 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. PX521 is highlighted; hover a dot for its name, or open the interactive family chart.
Manufacturability
The process limits FabDigit's quote engine applies to PX521. 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 | — |
3D printing
| Technologies | SLA |
|---|---|
| Layer height | 50 – 300 µmdefault 100 µm |
| Minimum wall / feature | 1 / 0.5 mm |
| Build envelope | 300 × 300 × 380 mm |
| Supports | Yes |
| Anisotropy | Moderate |
Conditions and tempers
How PX521 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 |
|---|---|---|---|---|---|
UV ResistantDefault Grade Modifier | Holds up outdoors — sun-exposed parts | — | — | — | — |
Heat treatment and post-processing
Operations FabDigit's suppliers routinely run on PX521, 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 PX521
Coatings and treatments compatible with polymer on the processes PX521 runs on. Pick them in the quote configurator or call them out on the drawing.
Coating
- Clear Coating
- Conductive Coating
- EMI Shielding Coating
- Primer Coating
- Soft Touch Coating
- Tinted Coating
- UV Coating
- Waterproof Coating
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)
- Vacuum Metallization
Coloring
- Dyeing (Nylon)
- Painting
Equivalent designations
Standards and trade names that resolve to PX521 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Trade names
- PMMA-like Casting Resin
Stock forms
Raw-material forms FabDigit sources PX521 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.