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 The Janka Hardness Testis a measure of the hardness of wood. The Janka Test was developed as a variation of the Brinell hardness test. The test measures the force required to push a steel ball with a diameter of 11.28 millimeters (0.444 inches) into the wood to a depth of half the ball’s diameter. The diameter was chosen to produce a circle with an area of 100 square millimeters. The Janka hardness values have been indicated below for your reference.Janka Hardness is measured in the following units: In USA the Force unit is pounds-force (pounds-force is shown below), Sweden:kilograms-force, Australia:newtons. EXOTIC & DOMESTIC LUMBER JANKA VALUES
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