POM-C UV GF30 vs POM-C UV UV-BK
Polymer · POM-C UV grade comparison
POM-C UV GF30 and POM-C UV UV-BK are two grades of the same polymer grade, POM-C UV: GF30 (30 % glass-fiber reinforced POM-C) versus UV-BK (carbon-black + UV-stabilized copolymer). The chemistry is identical, so every difference below comes from the condition. POM-C UV GF30 is the stronger of the two: tensile strength 135 MPa (19.6 ksi) against 64 MPa (9.28 ksi) for POM-C UV UV-BK, about 111% more. In exchange, POM-C UV UV-BK is the more ductile: elongation 30% versus 2.5% for POM-C UV GF30. POM-C UV UV-BK is lighter (1.41 g/cm³ vs 1.63 g/cm³ for POM-C UV GF30) and POM-C UV GF30 is stiffer (9.5 GPa vs 2.8 GPa). On the shop floor, POM-C UV UV-BK machines more easily (excellent vs good).
POM-C UV GF30Choose it when strength drives the design.
POM-C UV UV-BKChoose it when the part is bent, formed or impact-loaded, or when weight is the constraint.
POM-C UV GF30 vs POM-C UV UV-BK: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all polymer grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
How to read these bars
- One bar per material. A full bar is the highest value among all polymer grades in the FabDigit library; each bar is drawn as a share of that.
- The better value (by the usual engineering direction) is in bold. Rows with no direction — density, thermal conductivity — have no bold.
- Values are typical room-temperature figures for the condition named on each card.
- Confirm against the certified mill or resin datasheet before design release.
Mechanical
Strength, stiffness, ductility and hardness at room temperature.
Elastic (Young's) Modulus
Tensile Strength (Ultimate)
Elongation at Break
Flexural Strength
Flexural Modulus
Izod Impact, Notched
Same in both: Shear Modulus 1 GPa0.15 Msi · Bulk Modulus 4 GPa0.61 Msi · Poisson's Ratio 0.38 · Yield Strength (0.2% offset) 63 MPa9.1 ksi · Compressive Strength 100 MPa14.5 ksi · Compressive Modulus 2.8 GPa0.41 Msi · Shear Strength 55 MPa8 ksi · Fracture Toughness (K_IC) 3.5 MPa·√m3.2 ksi·√in · Hardness, Shore D 81 Shore D · Hardness, Rockwell M 80 HRM · Hardness, Rockwell R 118 HRR
Physical
Density and transition temperatures.
Density
Same in both: Melting Temperature (Tm) 166°C331 °F · Glass Transition (Tg) -60°C-76 °F · Water Absorption (24 h) 0.22% · Water Absorption (Saturation) 0.8%
Thermal
How each material carries heat and how hot it can run.
Thermal Expansion (CTE, 20–100 °C)
Heat Deflection Temp. @ 1.8 MPa
Same in both: Thermal Conductivity 0.31 W/m·K0.18 BTU/hr·ft·°F · Specific Heat Capacity 1,470 J/kg·K0.35 BTU/lb·°F · Max Service Temperature (continuous) 100°C212 °F · Min Service Temperature -50°C-58 °F · Heat Deflection Temp. @ 0.45 MPa 155°C311 °F · Vicat Softening Point (B50) 155°C311 °F · Limiting Oxygen Index 15% · Max Service Temperature (short-term) 140°C284 °F
Electrical
Conductivity and insulation.
Same in both: Electrical Resistivity 1×10¹² Ω·m3.94×10¹⁹ µΩ·in · Dielectric Strength 20 kV/mm508 V/mil · Dielectric Constant (1 MHz) 3.8 · Dissipation Factor (1 MHz) 0.006 · Volume Resistivity 1×10¹⁴ Ω·cm · Surface Resistivity 1×10¹⁴ Ω · Comparative Tracking Index (CTI) 600 V
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Same in both: Corrosion Resistance 80 / 100 · UV / Weathering Resistance 72 / 100
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Mold Shrinkage
Same in both: Weldability 35 / 100 · Formability (cold) 40 / 100 · Polishability 65 / 100 · Melt Flow Rate 9 g/10 min · Processing Melt Temperature (typ.) 200°C392 °F · Mold Temperature (typ.) 90°C194 °F
Sustainability
Primary-production footprint per kilogram.
Same in both: Embodied Energy (primary production) 96 MJ/kg41,273 BTU/lb · Embodied Carbon (primary production) 4.4 kg CO₂/kg · Embodied Water 180 L/kg21.6 gal/lb · Typical Recycled Content 0%
Strength versus weight
Yield strength against density for every polymer grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
POM-C UV GF30 vs POM-C UV UV-BK — frequently asked
Is POM-C UV GF30 stronger than POM-C UV UV-BK?
Yes. POM-C UV GF30 has a typical tensile strength of 135 MPa (19.6 ksi) against 64 MPa (9.28 ksi) for POM-C UV UV-BK — about 111% more.
Which grade does FabDigit quote by default, GF30 or UV-BK?
UV-BK is the default POM-C UV condition in the FabDigit quote flow. The other condition is available on request or by drawing note — specify it in the material field or the part notes and the quote is priced for it.
Which is easier to machine, POM-C UV GF30 or POM-C UV UV-BK?
POM-C UV UV-BK. Its machinability rates excellent (88/100) against good (55/100) for POM-C UV GF30.
Ready to make it?
Upload a CAD file and FabDigit prices the part in POM-C UV GF30 and POM-C UV UV-BK side by side — material, machining time, tolerance and finish in one quote. Certified material data ships with the order on request.
Typical handbook values for the conditions named above, normalised for comparison. Hardness on non-Brinell scales is converted approximately for charting only. Request certified data with your order for design-critical properties.