T800H vs UMS40
Composite · grade comparison
T800H and UMS40 are both composite grades. T800H is the stronger of the two: tensile strength 5,490 MPa (796 ksi) against 4,560 MPa (661 ksi) for UMS40, about 20% more. T800H is the more ductile: elongation 1.9% versus 1.2% for UMS40. UMS40 is stiffer (395 GPa vs 294 GPa) and UMS40 conducts heat better (50 W/m·K vs 35 W/m·K).
T800HChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
T800H vs UMS40: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all composite 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 composite 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
Compressive Strength
Poisson's Ratio
Flexural Strength
Flexural Modulus
Shear Strength
Physical
Density and transition temperatures.
Density
Thermal
How each material carries heat and how hot it can run.
Thermal Conductivity
Specific Heat Capacity
Thermal Expansion (CTE, 20–100 °C)
Max Service Temperature (short-term)
Same in both: Max Service Temperature (continuous) 400°C752 °F · Min Service Temperature -269°C-452 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion Resistance
UV / Weathering Resistance
Manufacturability
FabDigit workshop ratings (0–100 scores) — how each material behaves on the machine.
Machinability
Polishability
Sustainability
Primary-production footprint per kilogram.
Embodied Energy (primary production)
Embodied Carbon (primary production)
Same in both: Embodied Water 600 L/kg71.9 gal/lb · Typical Recycled Content 0%
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Thermal Diffusivity
Thermal Shock Resistance Index
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.
Manufacturing and finishing
| Capability | T800H | UMS40 |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$$$ High | $$$$ High |
| Min. machined wall | — | — |
| Best machined surface | — | — |
T800H vs UMS40 — frequently asked
Is T800H stronger than UMS40?
Yes. T800H has a typical tensile strength of 5,490 MPa (796 ksi) against 4,560 MPa (661 ksi) for UMS40 — about 20% more.
Which is cheaper, T800H or UMS40?
Both sit in the same relative cost tier ($$$$, high); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, T800H or UMS40?
UMS40, by a small margin. Both rate poor for machinability — 25/100 against 18/100 for T800H.
Ready to make it?
Upload a CAD file and FabDigit prices the part in T800H and UMS40 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.