Janka Hardness Chart
The Janka hardness test measures the force in pound per square inch required to embed a 0.444 steel ball to half its diameter in a 2 x 2 x 6 piece of wood. It is used to measure how a particular type of wood will withstand denting and wear. By the same token, its also a good indicator of how hard a species is to saw or mill. The table to the right shows the results of different hardwood species commonly used to make flooring.
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