poplar janka hardness

During a Janka hardness test, a metal ball the size of a BB is pressed into the wood until its embedded halfway. The Janka Hardness Test was conducted by measuring the amount of force necessary to embed a .444 inch steel ball into side of the wood up to one half of its diameter to determine its hardness rating, which is then recorded on the Janka Hardness Scale. The Janka test measures the amount of force required to embed a 0.444" steel ball into the wood to half of its diameter.

Woods with a higher rating are harder than woods with a lower rating. The Janka Test is a measure of the hardness of wood. The Janka Test was developed as a variation of the Brinell hardness test. There may be variations of more or less than 20% on the scale, since this is a scientific test. Poplar is an example of a tree that is technically a hardwood but had density and hardness … Janka wood hardness scale - The Janka rating is a measure of the amount of force it takes to push a .444" diameter steel ball half way into a piece of wood. The distinction between and softwood is related to how the species produces seeds. The Janka scale is used to determine the relative hardness of particular domestic or exotic wood species.

The scale used in the table is pounds-force. The Janka hardness test (from the Austrian-born emigrant Gabriel Janka, 1864–1932) … 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 amount of force required to make this happen is recorded. In general, hardwood trees grow slowly and as a result are more hard and dense but this isnt always the case. In the case of poplar, it takes 540 pounds of force, so it’s given the rating 540 lbf or 540 Janka.