The Janka hardness scale measures the resistance of a wood species to wear and denting. However, the blackthorn (Prunus spinosa) is not commonly listed on the Janka hardness scale due to its limited use in commercial applications. In general, blackthorn is known to be a very hard and dense wood, similar to other fruitwoods like cherry and plum, which typically have Janka hardness values ranging from 950 to 1200 pounds-force.
The Janka Hardness Scale rates the hardness of hardwood flooring and bamboo as well. You can read more about the Janka Scale and see a list of the Janka Hardness Ratings from FindAnyFloor here http://www.findanyfloor.com/hardwood/JankaHardnessRatings.xhtml
The Janka hardness rating of black walnut is approximately 1,010 pounds-force.
According to the Janka Hardness Scale Acacia rates at 1750 lbs in a sq inch.
http://surfpick.com/hardness/ This has all the answers
European Oak in many ways in similar on the Janka scale as Ameriacan Oak at 1360.
The hardness rating of black walnut wood is approximately 1,010 pounds-force on the Janka hardness scale.
Rubber tree wood is relatively soft and falls on the lower end of the Janka Wood Hardness Scale. Its hardness varies depending on the specific species of rubber tree, but it is typically in the range of 600-900 lbf (pounds-force).
White Oak is 1360 Northern Red Oak is 1290
We've got the chart on our website, www.carpetexpress.com Or just click the link in the related links below.The complete Janka Wood Hardness Scale is on www.morlanwoodgifts.com website. It has 2,166 woods listed alphabetically by common trade name, over 1,500 different botanical/scientific names plus the world's top 125 known softest woods listed in order of softness and the world's top 125 known hardest woods listed in order of hardness. Just click on the link below, Complete Janka Wood Hardness Scale.
Wood flooring is not required to meet specific hardness standards because each wood species has unique features and hardness. Hardness is measured on the Janka Hardness Scale. The Janka hardness test measures the amount of 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 result is expressed in pounds-force (lbf). If you're installing a floor in a high traffic area or you have large pets, you'll want to look at a floor with a higher Janka hardness rating because a higher hardness rating means that the floor will be more resistant to scratches, dents, and other types of damage. However, hardness isn't the only factor that goes into the durability of a floor. Other factors are the type of finish used, the amount of gloss, the number of coats, and even the grain of the wood. It's important to understand that while hardwood floors are tough, when it comes to indentations NO FLOOR is impervious to damage. The standard in the wood flooring industry is measured by comparing a given species hardness to white oak, which has a Janka rating or 1360. By comparing to domestic white or red oak you can tell how hard or soft a floor is. For species like Santos Mahogany (Janka rating 2200) or Brazilian Walnut aka Ipe (Janka rating 3680) which feature far denser grain patterns, and are thus harder and more resistant to some damage than species like North American Cherry (Janka rating 950) or Black Walnut (Janka rating 1010).
The hardness of the wood will depend on the species of hardwood. The Janka scale measures the hardness of species and red oak is the standard with hardness of 1,290 psi (pounds per square inch). You can see more on this in the attached link where it shows the hardness for many species.
Michael Carl Wiemann has written: 'Estimating Janka hardness from specific gravity for tropical and temperate species' -- subject(s): Hardness, Specific gravity, Testing, Wood