Diablo Flooring, Inc – Northern California Carpet & Floor Store

janka hardness test What is the Janka Hardness Test?

Janka hardness test measure the hardness or density of wood. Testing is done on samples, not on actual flooring. It measures the force required to embed a 0.44″ steel ball into the wood until half of the steel ball is into the wood. It was developed as a variation of Brinell test (measurement method of hardness of metals). Factors affect how flooring performs with type of core (for engineered flooring), grain direction and thickness of surface.

Results of measurements are stated in various ways for different countries. In United States, the measurement is in pounds-force (lbf). Other countries may state the test result in different units: kilogram-force (kgf), newtons (N), kilonewtons (kN), or simply treated as units (ex. “660 Janka”).

For more information on Janka test, please follow this outside link to USDA’s Forest Service, Research and Development: Forest Product Laboratory.

The common use of the Janka hardness test determines whether a species is suitable for use as flooring. This measurement technique determines the ability of type of wood for wear and withstand denting.

janka table Variations of wood species Urbanfloor carries

Wood Species Janka
Acacia 1750
Birch, White 1260
Cherry, Brazilian 2820
Cherry, North American 950
Hickory(Pecan) 1820
Mahogany, Santos 2200
Maple, Hard/Sugar 1450
Oak, White 1360
Walnut, North American 1010
Walnut, Brazilian 3580

Pin It on Pinterest