Corrosion Resistant Plastic · Commodity Thermoplastic
PP
PP is a corrosion resistant polymer — rigid, standard plastic. Typical values: 30 MPa yield, 0.9 g/cm³, rated to 80 °C. Available for CNC machining, Sheet metal, Injection molding, 3D printing at FabDigit.
Properties
Typical room-temperature values in the Homopolymer condition. Metric first, imperial in gray. The bars show where PP sits against the other 74 polymer grades in the catalog.
Datasheet
| Yield strength | 30 MPa4 ksi |
|---|---|
| Tensile strength | 35 MPa5 ksi |
| Hardness | 90 HRR |
| Density | 0.9 g/cm³0.033 lb/in³ |
| Specific strength (yield ÷ density) | 33 |
| Min service temp | 0 °C32 °F |
| Max service temp | 80 °C176 °F |
| Electrical conductivity | < 0.001 % IACSinsulator |
| Machinability | Very good70 / 100 |
| Weldability | Fair40 / 100 |
| Formability | Very good80 / 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. PP is highlighted; hover a dot for its name, or open the interactive family chart.
Manufacturability
The process limits FabDigit's quote engine applies to PP. Design inside these and the part quotes instantly; outside them it routes to an engineer.
CNC machining
| Machinability | Better70 / 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 | Better80 / 100 |
|---|---|
| Weldability | Fair40 / 100 |
Injection molding
| Mold shrinkage | — |
|---|---|
| Wall thickness | — – — |
| Recommended draft | — |
| Pre-drying | — |
3D printing
| Technologies | MJF, FDM |
|---|---|
| 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 PP 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 |
|---|---|---|---|---|---|
HomopolymerDefault Grade Modifier | Stiffer and harder-wearing (Delrin) — gears, bushings | — | — | — | — |
Standard Grade Modifier | Baseline grade — pick unless you need a special property below | — | — | — | — |
Copolymer Grade Modifier | Handles hot water and chemicals better — valves, plumbing | — | — | — | — |
GF10 10% Glass Fiber (GF10) | Slightly stiffer than unfilled, keeps most of the toughness | — | — | — | — |
GF30 30% Glass Fiber (GF30) | The structural default — mounts, housings, gears under sustained load | — | — | — | — |
GF20 20% Glass Fiber (GF20) | Mid stiffness without GF30 brittleness — loaded brackets | — | — | — | — |
GF40 40% Glass Fiber (GF40) | Stiffer than GF30 for higher loads — more brittle, harder on tools | — | — | — | — |
Talc Filled Reinforcement | Budget stiffening for PP — panels, containers | — | — | — | — |
Heat treatment and post-processing
Operations FabDigit's suppliers routinely run on PP, 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 PP
Coatings and treatments compatible with polymer on the processes PP 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
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)
- Vacuum Metallization
Coloring
- Dyeing (Nylon)
- Painting
Equivalent designations
Standards and trade names that resolve to PP in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Trade names
- Hostalen PPPro-faxPP Filament
- Also called
- Polypropylene
- Other
- PP (Polypropylene)
Stock forms
Raw-material forms FabDigit sources PP 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.