FabDigit

UMS40 vs T300 vs T700S vs T800H

Benchmark · 4 materials

Side-by-side benchmark of 4 composite grades.

UMS40 vs T300 and 2 more: properties

UMS40T300T700ST800H

Mechanical

Strength, stiffness, ductility and hardness at room temperature.

Elastic (Young's) Modulus

395 GPa57.3 Msi
230 GPa33.4 Msi
230 GPa33.4 Msi
294 GPa42.6 Msi

Poisson's Ratio

0.27
0.27

Tensile Strength (Ultimate)

4,560 MPa661 ksi
3,530 MPa512 ksi
4,900 MPa711 ksi
5,490 MPa796 ksi

Elongation at Break

1.2%
1.5%
2.1%
1.9%

Compressive Strength

1,000 MPa145 ksi
1,570 MPa228 ksi
1,470 MPa213 ksi
2,400 MPa348 ksi

Flexural Strength

1,450 MPa210 ksi
1,700 MPa247 ksi
1,620 MPa235 ksi

Flexural Modulus

230 GPa33.4 Msi
120 GPa17.4 Msi

Shear Strength

85 MPa12.3 ksi
90 MPa13.1 ksi
98 MPa14.2 ksi

Physical

Density and transition temperatures.

Density

1.79 g/cm³0.06 lb/in³
1.76 g/cm³0.06 lb/in³
1.8 g/cm³0.07 lb/in³
1.81 g/cm³0.07 lb/in³

Thermal

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

Thermal Conductivity

50 W/m·K28.9 BTU/hr·ft·°F
10.5 W/m·K6.1 BTU/hr·ft·°F
9.4 W/m·K5.4 BTU/hr·ft·°F
35 W/m·K20.2 BTU/hr·ft·°F

Specific Heat Capacity

710 J/kg·K0.17 BTU/lb·°F
750 J/kg·K0.18 BTU/lb·°F
750 J/kg·K0.18 BTU/lb·°F
750 J/kg·K0.18 BTU/lb·°F

Thermal Expansion (CTE, 20–100 °C)

-1 µm/m·K-0.56 µin/in·°F
-0.41 µm/m·K-0.23 µin/in·°F
-0.38 µm/m·K-0.21 µin/in·°F
-0.56 µm/m·K-0.31 µin/in·°F

Max Service Temperature (continuous)

400°C752 °F
350°C662 °F
350°C662 °F
400°C752 °F

Max Service Temperature (short-term)

500°C932 °F
500°C932 °F
500°C932 °F

Same in both: Min Service Temperature -269°C-452 °F

Electrical

Conductivity and insulation.

Electrical Resistivity

1×10⁻⁵ Ω·m394 µΩ·in
1.7×10⁻⁵ Ω·m669 µΩ·in
1.6×10⁻⁵ Ω·m630 µΩ·in
1.4×10⁻⁵ Ω·m551 µΩ·in

Volume Resistivity

0 Ω·cm
0 Ω·cm

Chemical & Environmental

Corrosion and environmental resistance (0–100 scores).

Corrosion Resistance

90 / 100
92 / 100
90 / 100
92 / 100

UV / Weathering Resistance

95 / 100
95 / 100
60 / 100
85 / 100

Manufacturability

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

Machinability

25 / 100
25 / 100
25 / 100
18 / 100

Polishability

40 / 100
55 / 100

Sustainability

Primary-production footprint per kilogram.

Embodied Energy (primary production)

700 MJ/kg300,946 BTU/lb
400 MJ/kg171,969 BTU/lb
400 MJ/kg171,969 BTU/lb
500 MJ/kg214,962 BTU/lb

Embodied Carbon (primary production)

50 kg CO₂/kg
26 kg CO₂/kg
28 kg CO₂/kg
34 kg CO₂/kg

Embodied Water

600 L/kg71.9 gal/lb
700 L/kg83.9 gal/lb
600 L/kg71.9 gal/lb

Same in both: Typical Recycled Content 0%

Common Calculations

Ratios derived from the values above.

Specific Strength (UTS / density)

2,547 kN·m/kg
2,006 kN·m/kg
2,722 kN·m/kg
3,033 kN·m/kg

Specific Stiffness (E / density)

220.7 MN·m/kg
130.7 MN·m/kg
127.8 MN·m/kg
162.4 MN·m/kg

Thermal Diffusivity

39.3 mm²/s
8 mm²/s
7 mm²/s
25.8 mm²/s

Thermal Shock Resistance Index

-577
-393
-527
-1,167

Strength versus weight

Yield strength against density for every composite grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.

1101001,000510Density (g/cm³)Yield strength (MPa) — log scale

Manufacturing and finishing

CapabilityUMS40T300T700ST800H
Default condition
Relative cost$$$$ High$$$$ High$$$$ High$$$$ High
Min. machined wall
Best machined surface

Ready to make it?

Upload a CAD file and FabDigit prices the part in UMS40 and T300 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.