Ipe
3680
The Janka Test is 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.
3680
3670
3540
3250
3220
3190
2960
2900
2820
2520
2500
2300
2200
2200
2200
2200
2200
2200
2150
1980
1980
1970
2170
1830
1820
1820
1660
1630
1450
1450
1450
1410
1375
1360
1360
1320
1300
1290
1290
1260
1220
1210
1200
1110
1100
1080
1050
1050
1010
950
950
950
950
950
900
840
830
600
600
590
540
510
490
490
410