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Janka Scale
The Janka (or side) hardness test measures the force required to embed a .444 inch steel ball to half its diameter in wood. This is one of the best measures of the ability of wood species to withstand denting and wear. It is also a good indicator of how hard a species is to saw or nail.
| Wood |
Hardness |
| Brazilian Walnut |
3620 |
| Brazilian Teak |
3540 |
| Brazilian Cherry |
2350 |
| Mesquite |
2345 |
| Hickory / Pecan |
1820 |
| Bamboo |
1800 |
| White Oak |
1360 |
| Ash |
1320 |
| American Beech |
1300 |
| Red Oak (Northern) |
1290 |
| Yellow Birch |
1260 |
| Heart Pine |
1225 |
| Black Walnut |
1010 |
| Teak |
1000 |
| Black Cherry |
950 |
| So. Yellow Pine (longleaf) |
870 |
| So. Yellow Pine (loblolly & short leaf) |
690 |
| Douglas Fir |
660 |
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