Ipe
3680
Complete listing of janka ratings for exotic and domestic hardwoods.
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
3570
3540
3250
3220
3190
3160
2960
2900
2820
2680
2650
2530
2520
2500
2420
2340
2300
2200
2200
2200
2200
2200
2200
2200
2170
2150
1980
1980
1970
1900
1830
1820
1820
1820
1660
1630
1530
1450
1450
1450
1410
1375
1370
1360
1360
1320
1300
1290
1290
1260
1260
1225
1220
1650
1650
1650
1200
1110
1100
1080
1070
1050
1050
1020
1010
990
950
950
950
950
950
950
900
900
880
860
840
830
800
770
760
650
600
590
540
510
490
490
470
410
350