Janka Hardness Test

Janka Hardness is a test that measures the pounds of force it takes to drive a .44" diameter steel ball 1/2 its depth into wood. The numbers below are taken from various publications and have been converted to Kilonewtons. The higher the figure, the harder the species. Flooring Trade Name Hardness - Janka     Brazilian Walnut 16.37 Strand Woven Bamboo 16.10 Brazilian Teak 15.75 Caribbean Cherry 13.79 Tamarind 13.45 Bloodwood 12.90 Brazilian Cherry 12.54 Patagonian Cherry 12.46 Patagonian Rosewood 12.46 Tiete Rosewood 12.46 Patagonian Walnut 12.46 Southern Chestnut 11.88 Caribbean Rosewood 10.23 Honduran Rosewood 9.79 Santos Mahogany 9.79 Goncalo Alves 9.61 Tigerwood 9.61 Purpleheart 9.30 Northern Brushbox 9.10 Sydney Blue Gum 9.01 Bubinga 8.81 Merbeau 8.56 Bolivian Rosewood 7.92 Doussie 7.78 African Padauk 7.67 Jarrah 7.61 Shedua 7.34 Wenge 7.25 Zebrawood 7.01 Patagonian Maple 6.67 Vertical Bamboo 6.58 North American Maple 6.45 Caribbean walnut 6.23 Australian Cyprus 6.12 Horizontal Bamboo 5.87 European Beech 5.78 Kambala 5.60 True Teak 5.14 Peruvian Walnut 4.80 Tasmanian Oak 4.49 Victorian Ash 4.49

 

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