Variations within species and grades: Moderate to high color variation.
Hardness (Janka): 1910; 48% harder than Northern red oak.
Dimensional Stability: Below average (change coefficient .00396; 7% less stable than red oak).
Durability: Dense and very strong; high resistance to wear.
Sawing/Machining: Difficult to work because of high density and irregular grain; carbide tooling recommended.
Sanding: Sands well, but dust can stain fabric and wall treatments.
Nailing: Good holding ability.
Finishing: Red color can bleed into some finishes — a problem when mixing species.
Comments: Resistant to termites and fungus.
Information is from The National Wood Flooring Association
"Wood Species Used in Wood Flooring"