Juglans nigra
Black Walnut (Juglans nigra) is a medium-hardness wood balancing workability and wear resistance, with a Janka hardness of 625 lbf (2780 N) and a density of about 0.55 g/cm³. It originates from north america.
With radial shrinkage of 5.5% and tangential shrinkage of 7.8% (a T/R ratio of 1.42), it is very stable in service, with low risk of cupping or distortion. Its fiber saturation point is around 28%, below which the wood begins to shrink and move as it dries.
These figures feed directly into the Vriksai calculators below — select Black Walnut in any of them to get species-specific results for weight, moisture, shrinkage and hardness.