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The Janka (or side) hardness test measures the force required to embed a .444 inch steel ball to half its diameter in wood. This is one of the best measures of the ability of wood species to withstand denting and wear. It is also a good indicator of how hard a species is to saw or nail.  

The higher the number the harder the wood

Douglas Fir     

660

So. Yellow Pine (loblolly & short leaf)  690
So. Yellow Pine (longleaf)     870
Black Cherry                 950
Teak                              1000
Black Walnut                  1010
Bamboo (carbonized) 1180
Heart Pine                        1225
Yellow Birch                     1260
Red Oak (Northern)           1290
American Beech                 1300
Ash                                      1320
White Oak                            1360
Australian Cypress                1375
Bamboo (natural) 1380
Hard maple                            1450
Wenge                                     1630
Brazilian Oak 1650
Peruvian Maple 1700
African Pedauk      1725
Hickory/Pecan                            1820
Kempas 1854
Purpleheart                                 1860
Jarrah                                           1910
Merbau                                         1925
African Rosewood 1980
Grapia 2053
Burma Mahogany 2170
Amberwood 2200
Santos Mahogany                  2200
Mesquite                                           2345
Brazilian Cherry                           2350
Peruvian Cherry 2350
Red Walnut 2450
Camaru (Brazilian Teak) 3540
Lapacho 3670
Patagonian Rosewood 3840
Brazilian Tiger Mahogany  3840
Curupy 3880

 

 



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