Shagbark hickory
Carya ovata
Shagbark hickory measures 1,880 lbf on the Janka scale, 46% harder than northern red oak.
- No other U.S. hardwood in the tables is stronger in bending.
- Only six of the 155 woods are stronger for their weight.
- Of the four hickories in the handbook, none shrinks less across the face.
- It sits in the top quarter of the list for both hardness and shrinkage across the face.
U.S. hardwoodsU.S. softwoodsImported woodsNorthern red oak
Six measures
Shagbark hickoryU.S. hardwoods medianOther woods
Bending strength
20,200 psi139.3 MPa15th strongest of 15555% above the U.S. hardwoods median4,300 psi29,900 psiShrinkage across the face
10.5%radial 7.0%18th highest of 1553.5%12.7%Janka hardness
1,880 lbf8,363 N22nd hardest of 1553rd of 53 U.S. hardwoods; 62% above the U.S. hardwoods median240 lbf3,680 lbfCupping tendency
1.5025th lowest of 1551.092.90Stiffness
2.16 M psi14.9 GPa30th stiffest of 15535% above the U.S. hardwoods median0.54 M psi4.06 M psiDensity
0.640.72 at 12% MC31st heaviest of 1550.250.96
For its weight: strength-to-weight 31,562 psi (7th of 155).
How much it moves
It shrinks a lot, but the two directions stay close (T/R 1.50), so a board loses size more than it changes shape.
0.63 in.
off a 6-inch flatsawn board, green to oven-dry; quartersawn 0.42 in.
- Tangential
- 10.5%
- Radial
- 7.0%
- Volume
- 16.7%
- T/R ratio
- 1.50 (25th most stable of 155)
End view, shrinkage drawn 3× life size.
Closest substitutes
- Pignut hickory
14% harder · 3% heavier · shrinks 1.0 points more across the face
- Mockernut hickory
5% harder · same density · shrinks 0.5 points more across the face
- Jarrah
2% harder · 5% heavier · shrinks 0.5 points more across the face
Among the hickories
3rd hardest of 4, lbf.
Laboratory values
Its most unusual laboratory figure is work to maximum load: 5th highest of the 142 woods with a published value.
| Property | Green | Dry, 12% MC | Change when dried | Metric, 12% MC |
|---|---|---|---|---|
| Work to maximum load | 23.7in-lbf/in³ | 25.8in-lbf/in³ | +9% | 177.9kJ/m³ |
| Impact bending | 74in. | 67in. | −9% | 1,702mm |
| Compression perpendicular | 840psi | 1,760psi | +110% | 12.1MPa |
| Shear parallel to grain | 1,520psi | 2,430psi | +60% | 16.8MPa |
| Modulus of rupture | 11,000psi | 20,200psi | +84% | 139.3MPa |
| Side hardness | 1,460lbf | 1,880lbf | +29% | 8,363N |
| Compression parallel to grain | 4,580psi | 9,210psi | +101% | 63.5MPa |
| Modulus of elasticity | 1.57M psi | 2.16M psi | +38% | 14.9GPa |
Wood Handbook Table 5-3b, Table 4-3. Data & method · Guides