Swamp chestnut oak
Quercus michauxii
Swamp chestnut oak measures 1,240 lbf on the Janka scale, 4% softer than northern red oak.
- It is softer than its weight suggests: the trend across all 155 woods puts a specific gravity of 0.60 near 1,520 lbf.
- Caribbean pine has exactly the same Janka figure.
- Overall it falls in the top fifth for face shrinkage and volumetric shrinkage.
U.S. hardwoodsU.S. softwoodsImported woodsNorthern red oak
Six measures
Swamp chestnut oakU.S. hardwoods medianOther woods
Shrinkage across the face
10.8%radial 5.2%15th highest of 1553.5%12.7%Cupping tendency
2.0836th highest of 1551.092.90Density
0.600.67 at 12% MC39th heaviest of 1550.250.96Janka hardness
1,240 lbf5,516 N57th hardest of 15520th of 53 U.S. hardwoods240 lbf3,680 lbfStiffness
1.77 M psi12.2 GPa63rd stiffest of 1550.54 M psi4.06 M psiBending strength
13,900 psi95.8 MPa64th strongest of 1554,300 psi29,900 psi
How much it moves
Most of its movement runs along the rings (T/R 2.08): quartersawn, the same board would lose 0.31 in. instead of 0.65 in.
0.65 in.
off a 6-inch flatsawn board, green to oven-dry
- Tangential
- 10.8%
- Radial
- 5.2%
- Volume
- 16.4%
- T/R ratio
- 2.08 (118th most stable of 155)
End view, shrinkage drawn 3× life size.
Closest substitutes
- Chestnut oak
9% softer · 5% lighter · same face shrinkage
- White oak
10% harder · same density · shrinks 0.3 points less across the face
- American beech
5% harder · 7% lighter · shrinks 1.1 points more across the face
Among the oaks
9th hardest of 15, lbf; the neighbours either side are shown, the rest are on the oaks page.
Laboratory values
| Property | Green | Dry, 12% MC | Change when dried | Metric, 12% MC |
|---|---|---|---|---|
| Compression perpendicular | 570psi | 1,110psi | +95% | 7.70MPa |
| Impact bending | 45in. | 41in. | −9% | 1,041mm |
| Shear parallel to grain | 1,260psi | 1,990psi | +58% | 13.7MPa |
| Tension perpendicular | 670psi | 690psi | +3% | 4.80MPa |
| Side hardness | 1,110lbf | 1,240lbf | +12% | 5,516N |
| Modulus of elasticity | 1.35M psi | 1.77M psi | +31% | 12.2GPa |
| Modulus of rupture | 8,500psi | 13,900psi | +64% | 95.8MPa |
| Compression parallel to grain | 3,540psi | 7,270psi | +105% | 50.1MPa |
| Work to maximum load | 12.8in-lbf/in³ | 12in-lbf/in³ | −6% | 82.7kJ/m³ |
Wood Handbook Table 5-3b, Table 4-3. Data & method · Guides