Southern Yellow Pine vs SPF
Natural Material · grade comparison
Southern Yellow Pine and SPF are both natural material grades. Southern Yellow Pine is the stronger of the two: tensile strength 80 MPa (11.6 ksi) against 22 MPa (3.19 ksi) for SPF, about 3.6 times as much. Southern Yellow Pine is the more ductile: elongation 1.2% versus 1% for SPF. SPF is lighter (0.42 g/cm³ vs 0.62 g/cm³ for Southern Yellow Pine) and Southern Yellow Pine is stiffer (11.5 GPa vs 9.7 GPa). On the shop floor, SPF machines more easily (excellent vs very good).
Southern Yellow PineChoose it when strength drives the design, or when the part is bent, formed or impact-loaded.
SPFChoose it when weight is the constraint, or when the part is machined in volume.
Southern Yellow Pine vs SPF: 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 -60°C-76 °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
Same in both: Polishability 45 / 100
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)
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 | Southern Yellow Pine | SPF |
|---|---|---|
| Default condition | — | — |
| Relative cost | $ Budget | $ Budget |
| Min. machined wall | — | — |
| Best machined surface | — | — |
Southern Yellow Pine vs SPF — frequently asked
Is Southern Yellow Pine stronger than SPF?
Yes. Southern Yellow Pine has a typical tensile strength of 80 MPa (11.6 ksi) against 22 MPa (3.19 ksi) for SPF — about 3.6 times as much.
Which is cheaper, Southern Yellow Pine or SPF?
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, Southern Yellow Pine or SPF?
SPF. Its machinability rates excellent (95/100) against very good (80/100) for Southern Yellow Pine.
Ready to make it?
Upload a CAD file and FabDigit prices the part in Southern Yellow Pine and SPF 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.