CLT vs Hardboard
Natural Material · grade comparison
CLT and Hardboard are both natural material grades. Hardboard is the stronger of the two: tensile strength 20 MPa (2.9 ksi) against 16 MPa (2.32 ksi) for CLT, about 25% more. CLT is lighter (0.47 g/cm³ vs 0.95 g/cm³ for Hardboard) and CLT is stiffer (11 GPa vs 4.2 GPa). On the shop floor, CLT machines more easily (excellent vs very good) and Hardboard sits in a lower cost tier (budget, $) than CLT (standard, $$).
CLTChoose it when weight is the constraint, or when the part is machined in volume.
HardboardChoose it when strength drives the design, or when the part sees heat.
CLT vs Hardboard: propertiesHow to read these bars
- One bar per material. A full bar is the highest value among all natural material 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 natural material 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
Shear Modulus
Poisson's Ratio
Tensile Strength (Ultimate)
Elongation at Break
Compressive Strength
Flexural Strength
Shear Strength
Fracture Toughness (K_IC)
Physical
Density and transition temperatures.
Density
Porosity
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 (continuous)
Same in both: Min Service Temperature -50°C-58 °F
Electrical
Conductivity and insulation.
Electrical Resistivity
Dielectric Strength
Chemical & Environmental
Corrosion and environmental resistance (0–100 scores).
Corrosion 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)
Typical Recycled Content
Embodied Water
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Thermal Diffusivity
Same in both: Thermal Shock Resistance Index 0
Strength versus weight
Yield strength against density for every natural material grade in the FabDigit library; the compared grades are highlighted. Up and left is stronger for its weight.
Manufacturing and finishing
| Capability | CLT | Hardboard |
|---|---|---|
| Default condition | — | — |
| Relative cost | $$ Standard | $ Budget |
| Min. machined wall | — | — |
| Best machined surface | — | — |
CLT vs Hardboard — frequently asked
Is Hardboard stronger than CLT?
Yes. Hardboard has a typical tensile strength of 20 MPa (2.9 ksi) against 16 MPa (2.32 ksi) for CLT — about 25% more.
Which is cheaper, CLT or Hardboard?
Hardboard is the lower-cost material: it sits in the budget tier ($) while CLT is standard ($$). Part price depends far more on geometry, tolerance and quantity than on raw stock — upload a CAD file for a live quote.
Which is easier to machine, CLT or Hardboard?
CLT. Its machinability rates excellent (92/100) against very good (70/100) for Hardboard.
Ready to make it?
Upload a CAD file and FabDigit prices the part in CLT and Hardboard 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.