Hardboard vs OSB
Natural Material · grade comparison
Hardboard and OSB are both natural material grades. Hardboard is the stronger of the two: tensile strength 20 MPa (2.9 ksi) against 12 MPa (1.74 ksi) for OSB, about 67% more. OSB is lighter (0.64 g/cm³ vs 0.95 g/cm³ for Hardboard) and Hardboard is stiffer (4.2 GPa vs 3.5 GPa). On the shop floor, OSB machines more easily (excellent vs very good).
HardboardChoose it when strength drives the design, or when the part sees heat.
OSBChoose it when weight is the constraint, or when the part is machined in volume.
Hardboard vs OSB: 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
Tensile Strength (Ultimate)
Compressive Strength
Flexural Strength
Shear Strength
Fracture Toughness (K_IC)
Same in both: Poisson's Ratio 0.25 · Elongation at Break 1%
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).
Same in both: Corrosion Resistance 30 / 100
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)
Embodied Water
Typical Recycled Content
Common Calculations
Ratios derived from the values above.
Specific Strength (UTS / density)
Specific Stiffness (E / density)
Same in both: Thermal Diffusivity 0.1 mm²/s · 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 | Hardboard | OSB |
|---|---|---|
| Default condition | — | — |
| Relative cost | $ Budget | $ Budget |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Hardboard vs OSB — frequently asked
Is Hardboard stronger than OSB?
Yes. Hardboard has a typical tensile strength of 20 MPa (2.9 ksi) against 12 MPa (1.74 ksi) for OSB — about 67% more.
Which is cheaper, Hardboard or OSB?
Both sit in the same relative cost tier ($, budget); the part price will be decided by machining time, tolerance and quantity rather than by the material.
Which is easier to machine, Hardboard or OSB?
OSB. Its machinability rates excellent (85/100) against very good (70/100) for Hardboard.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Hardboard and OSB 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.