FabDigit

G9 vs MF vs MF Moulding Compound vs UF

Benchmark · 4 materials

Side-by-side benchmark of 4 polymer grades.

G9 vs MF and 2 more: properties

G9MFMF Moulding CompoundUF

Mechanical

Strength, stiffness, ductility and hardness at room temperature.

Elastic (Young's) Modulus

18 GPa2.6 Msi
9 GPa1.3 Msi
8.5 GPa1.2 Msi
9 GPa1.3 Msi

Shear Modulus

6 GPa0.87 Msi

Poisson's Ratio

0.17
0.33
0.34
0.33

Tensile Strength (Ultimate)

220 MPa31.9 ksi
70 MPa10.2 ksi
62 MPa9 ksi
65 MPa9.4 ksi

Elongation at Break

1.5%
0.8%
0.7%
0.8%

Compressive Strength

415 MPa60.2 ksi
250 MPa36.3 ksi
240 MPa34.8 ksi
250 MPa36.3 ksi

Flexural Strength

300 MPa43.5 ksi
100 MPa14.5 ksi
100 MPa14.5 ksi
90 MPa13.1 ksi

Flexural Modulus

17 GPa2.5 Msi
9 GPa1.3 Msi
8.3 GPa1.2 Msi
9 GPa1.3 Msi

Shear Strength

130 MPa18.9 ksi
60 MPa8.7 ksi
70 MPa10.2 ksi

Izod Impact, Notched

600 J/m11.2 ft·lbf/in
16 J/m0.3 ft·lbf/in
15 J/m0.28 ft·lbf/in
16 J/m0.3 ft·lbf/in

Hardness, Rockwell M

110 HRM
118 HRM
120 HRM
115 HRM

Compressive Modulus

9.5 GPa1.4 Msi

Fracture Toughness (K_IC)

1 MPa·√m0.91 ksi·√in

Hardness, Rockwell R

125 HRR

Physical

Density and transition temperatures.

Density

1.95 g/cm³0.07 lb/in³
1.5 g/cm³0.05 lb/in³
1.5 g/cm³0.05 lb/in³
1.5 g/cm³0.05 lb/in³

Water Absorption (24 h)

0.7%
0.35%
0.4%
0.6%

Water Absorption (Saturation)

1.6%
1.5%
1.6%
2.5%

Glass Transition (Tg)

220°C428 °F
130°C266 °F

Refractive Index

1.56

Thermal

How each material carries heat and how hot it can run.

Thermal Conductivity

0.35 W/m·K0.2 BTU/hr·ft·°F
0.4 W/m·K0.23 BTU/hr·ft·°F
0.3 W/m·K0.17 BTU/hr·ft·°F
0.3 W/m·K0.17 BTU/hr·ft·°F

Specific Heat Capacity

1,100 J/kg·K0.26 BTU/lb·°F
1,600 J/kg·K0.38 BTU/lb·°F
1,600 J/kg·K0.38 BTU/lb·°F
1,500 J/kg·K0.36 BTU/lb·°F

Thermal Expansion (CTE, 20–100 °C)

17 µm/m·K9.4 µin/in·°F
40 µm/m·K22.2 µin/in·°F
40 µm/m·K22.2 µin/in·°F
30 µm/m·K16.7 µin/in·°F

Max Service Temperature (continuous)

150°C302 °F
120°C248 °F
130°C266 °F
75°C167 °F

Min Service Temperature

-60°C-76 °F
-40°C-40 °F
-40°C-40 °F
-40°C-40 °F

Limiting Oxygen Index

45%
34%
32%
32%

Max Service Temperature (short-term)

200°C392 °F
150°C302 °F
150°C302 °F
100°C212 °F

Heat Deflection Temp. @ 0.45 MPa

200°C392 °F
195°C383 °F
145°C293 °F

Heat Deflection Temp. @ 1.8 MPa

180°C356 °F
180°C356 °F
130°C266 °F

Electrical

Conductivity and insulation.

Electrical Resistivity

1×10¹¹ Ω·m3.94×10¹⁸ µΩ·in
1×10¹⁰ Ω·m3.94×10¹⁷ µΩ·in
1×10¹¹ Ω·m3.94×10¹⁸ µΩ·in
1×10¹⁰ Ω·m3.94×10¹⁷ µΩ·in

Dielectric Strength

13.8 kV/mm351 V/mil
14 kV/mm356 V/mil
13 kV/mm330 V/mil
14 kV/mm356 V/mil

Dielectric Constant (1 MHz)

7.5
7
6.5
6.6

Dissipation Factor (1 MHz)

0.025
0.04
0.035
0.035

Volume Resistivity

1×10¹³ Ω·cm
1×10¹² Ω·cm
1×10¹³ Ω·cm
1×10¹² Ω·cm

Surface Resistivity

1×10¹² Ω
1×10¹² Ω
1×10¹³ Ω
1×10¹² Ω

Same in both: Comparative Tracking Index (CTI) 600 V

Chemical & Environmental

Corrosion and environmental resistance (0–100 scores).

Corrosion Resistance

72 / 100
60 / 100
62 / 100
55 / 100

UV / Weathering Resistance

55 / 100
60 / 100
70 / 100
35 / 100

Manufacturability

FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.

Machinability

28 / 100
40 / 100
45 / 100
40 / 100

Polishability

30 / 100
75 / 100
80 / 100
70 / 100

Weldability

0 / 100
0 / 100
0 / 100

Formability (cold)

5 / 100
5 / 100
5 / 100

Mold Shrinkage

1%
0.8%
0.8%

Mold Temperature (typ.)

160°C320 °F
155°C311 °F
155°C311 °F

Processing Melt Temperature (typ.)

95°C203 °F

Sustainability

Primary-production footprint per kilogram.

Embodied Energy (primary production)

72 MJ/kg30,954 BTU/lb
100 MJ/kg42,992 BTU/lb
85 MJ/kg36,543 BTU/lb
80 MJ/kg34,394 BTU/lb

Embodied Carbon (primary production)

4.2 kg CO₂/kg
5 kg CO₂/kg
4.5 kg CO₂/kg
3.2 kg CO₂/kg

Embodied Water

200 L/kg24 gal/lb
180 L/kg21.6 gal/lb
120 L/kg14.4 gal/lb

Same in both: Typical Recycled Content 0%

Common Calculations

Ratios derived from the values above.

Specific Strength (UTS / density)

113 kN·m/kg
47 kN·m/kg
41 kN·m/kg
43 kN·m/kg

Specific Stiffness (E / density)

9.2 MN·m/kg
6 MN·m/kg
5.7 MN·m/kg
6 MN·m/kg

Thermal Diffusivity

0.2 mm²/s
0.2 mm²/s
0.1 mm²/s
0.1 mm²/s

Same in both: Thermal Shock Resistance Index 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.

0.1110100123Density (g/cm³)Yield strength (MPa) — log scale

Manufacturing and finishing

CapabilityG9MFMF Moulding CompoundUF
Default condition
Relative cost$$$$ High$$ Standard$$ Standard$$ Standard
Min. machined wall
Best machined surface

Ready to make it?

Upload a CAD file and FabDigit prices the part in G9 and MF 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.