PC Standard
Grade
ISO 7391 · also Calibre, Makrolon
The commodity medium-viscosity molding grade (Makrolon 2405/2407, Lexan 940-class) for general housings and covers.
Values for the Standard condition
Other PC grades and fills
PC is listed in 12 conditions; see the grade overview at PC.
Compare all 12 grades and fillsHide
| Grade · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness |
|---|---|---|---|---|---|
FDM/FFF filament part | For 3D-printed PC tooling and jigs: keeps PC's heat resistance but layer bonding cuts strength and impact sharply. | — | 50 | 5 | — |
PTFE-lubricated bearing grade | Internally lubricated compound for gears, bushings and sliding parts where unfilled PC would squeal and wear. | 54 | 55 | 6 | 79 Shore D |
ESD / static-dissipative compound | For electronics trays, carriers and covers requiring controlled surface resistivity; opaque, black, reduced ductility. | 58 | 60 | 20 | 85 Shore D |
UL 94 V-0 rated | For thin-wall electrical parts that must certify V-0 at 1.5 mm or less, often with 5VA option. | 61 | 63 | 90 | 85 Shore D |
Flame retardant | Choose for enclosures needing a flame rating with only a small loss of impact and heat resistance. | 62 | 65 | 100 | 84 Shore D |
StandardThis page Standard injection/extrusion grade (medium viscosity) | The commodity medium-viscosity molding grade (Makrolon 2405/2407, Lexan 940-class) for general housings and covers. | 63 | 66 | 110 | 84 Shore D |
10% glass fiber reinforced | Modest stiffness and shrinkage improvement while keeping usable toughness; opaque. | — | 80 | 6 | — |
20% glass fiber reinforced | Balanced stiffness/strength upgrade for structural housings and brackets. | — | 100 | 4 | — |
10% carbon fiber reinforced | Stiff, light and partially static-dissipative; used for handling fixtures and slim electronic frames. | — | 105 | 3 | — |
30% glass fiber reinforced | Maximum stiffness/creep resistance and lowest shrinkage in PC; brittle and abrasive to tooling. | — | 125 | 3 | — |
20% carbon fiber reinforced | Highest specific stiffness PC compound, conductive enough for ESD housings; anisotropic and brittle. | — | 145 | 2 | — |
40% Glass Fiber | Highly glass-reinforced polycarbonate with maximum stiffness and dimensional stability, low CTE and near-zero ductility; used for structural housings, brackets and metal-replacement parts. | — | 150 | 2 | 93 HRM |
What is PC Standard?
PC Standard is PC in the Standard grade — the commodity medium-viscosity molding grade (Makrolon 2405/2407, Lexan 940-class) for general housings and covers. PC Standard has a yield strength of 63 MPa (9.14 ksi) and a tensile strength of 66 MPa (9.57 ksi) — stronger than 74% of polymer grades. Elongation at break is 110% and the elastic modulus is 2.4 GPa (0.341 Msi). PC Standard has a density of 1.2 g/cm³ (0.0434 lb/in³), heavier than 57% of polymer grades. Its glass-transition temperature is 147°C (297 °F).
Advantages
- Polishes to a fine finish — 85/100, better than 92% of polymer grades
Limitations
- Needs corrosion protection — 50/100, worse than 97% of polymer grades
PC Standard properties
Typical room-temperature values for PC Standard; 27 are specific to this condition. Other listed values are PC reference data and may not represent this condition. Bars are the position among polymer grades.
Physical6
PC Standard has a density of 1.2 g/cm³ (0.0434 lb/in³), heavier than 57% of polymer grades. Its glass-transition temperature is 147°C (297 °F).
Mechanical17
PC Standard has a yield strength of 63 MPa (9.14 ksi) and a tensile strength of 66 MPa (9.57 ksi) — stronger than 74% of polymer grades. Elongation at break is 110% and the elastic modulus is 2.4 GPa (0.341 Msi).
Thermal11
PC Standard is rated for continuous service to 118°C (244 °F). It conducts heat at 0.2 W/m·K (0.116 BTU/hr·ft·°F), worse than 56% of polymer grades. Thermal expansion is 67 µm/m·K (37.2 µin/in·°F).
Electrical7
PC Standard is an electrical insulator with a dielectric strength of 22 kV/mm (558.8 V/mil) and a resistivity of 1×10¹⁴ Ω·m.
Chemical & Environmental3
Corrosion resistance is fair (50/100), worse than 97% of polymer grades. UV resistance is poor.
Sustainability4
Producing a kilogram of PC Standard takes about 105 MJ of energy and emits 6.3 kg of CO₂ — more than 54% of polymer grades. Typical recycled content is 5%.
Manufacturability8
PC Standard's machinability is very good (70/100, better than 74% of polymer grades); weldability very good (70/100); formability good (65/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with PC Standard
Is PC easy to machine?
Machines cleanly with sharp, high-rake tools, high speed and low feed with air/mist cooling; anneal 1–2 h near 120 °C before/after cutting to avoid stress crazing, and never use aggressive coolants.
Can PC be welded?
Joins well by ultrasonic, hot-plate, laser and solvent/adhesive bonding (methylene-chloride or urethane/epoxy); avoid over-welding that traps stress, and dry parts first.
Can PC be formed, bent or molded?
Dry to <0.02% moisture (120 °C, 3–4 h) before molding at 280–320 °C melt / 80–120 °C mold; sheet thermoforms and cold line-bends easily with generous bend radii (>1.5× thickness cold).
What surface finishes work on PC?
Takes vacuum metallizing, hard-coat (silicone/acrylic) for scratch and UV protection, pad printing and paint with PC-compatible solvent systems; polish with fine abrasives and plastic compound, and avoid alkaline or ketone cleaners.
PC 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 |
|---|---|---|
| heat/process stabilizer (phosphite, hind | 0.05 – 0.5 | 0.2 |
| mold release (ester/wax) | 0.1 – 0.6 | 0.3 |
| UV absorber (benzotriazole/triazine)only in UV-stabilized/weatherable grades | 0 – 1 | 0 |
| glass fiberGF10–GF40 reinforced variants | 0 – 40 | 0 |
| carbon fiberCF10–CF30 variants | 0 – 30 | 0 |
| flame retardant (organic phosphate / sulFR / V-0 variants | 0 – 8 | 0 |
| bisphenol-A polycarbonate (BPA-PC) resinlinear aromatic polycarbonate from bisphenol A + phosgene or melt transesterification with diphenyl carbonate | ≥ 95 (balance) | — |
PC Standard — frequently asked
What is PC Standard used for?
PC Standard is typically used for machine guards and safety shields, clear windows and glazing panels, lighting lenses and light pipes, electronic and instrument enclosures, medical device housings and battery and connector housings. In short: impact resistant; stiff.
What is the yield strength of PC Standard?
PC Standard has a typical yield strength of 63 MPa (9.14 ksi) and a tensile strength of 66 MPa (9.57 ksi) — stronger than 74% of polymer grades. Strength varies by condition: see the 12 listed tempers.
Is PC Standard easy to machine?
Yes — machinability is rated very good (70/100, better than 74% of polymer grades). Machines cleanly with sharp, high-rake tools, high speed and low feed with air/mist cooling; anneal 1–2 h near 120 °C before/after cutting to avoid stress crazing, and never use aggressive coolants.
Can PC Standard be welded?
Yes — weldability is rated very good (70/100). Joins well by ultrasonic, hot-plate, laser and solvent/adhesive bonding (methylene-chloride or urethane/epoxy); avoid over-welding that traps stress, and dry parts first.
What surface finishes work on PC Standard?
Takes vacuum metallizing, hard-coat (silicone/acrylic) for scratch and UV protection, pad printing and paint with PC-compatible solvent systems; polish with fine abrasives and plastic compound, and avoid alkaline or ketone cleaners.
Can PC Standard be formed, bent or molded?
Dry to <0.02% moisture (120 °C, 3–4 h) before molding at 280–320 °C melt / 80–120 °C mold; sheet thermoforms and cold line-bends easily with generous bend radii (>1.5× thickness cold).
What is the maximum service temperature of PC Standard?
PC Standard is rated for continuous use to about 118°C (244 °F), and briefly to 145°C. Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in PC Standard?
Yes — PC Standard is available for CNC machining, sheet metal, injection molding and 3D printing with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- Makrolon polycarbonate product datasheets and processing guide — Covestro (2023)
- LEXAN resin product datasheets — SABIC (2023)
- Panlite / Iupilon PC grade data — Teijin / Mitsubishi Engineering-Plastics (2022)
- CAMPUS plastics database — PC ISO 10350 datasets — CWFG/CAMPUS (2024)
- ASM Engineered Materials Handbook Vol. 2: Engineering Plastics — ASM International (1988)
- ISO 7391 Plastics — Polycarbonate moulding and extrusion materials — ISO (2006)
- ASTM D3935 Standard Classification System for Polycarbonate Molding and Extrusion Materials — ASTM (2017)
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.