janka scale pdf. Ash. The Janka Hardness scale is commonly used in the flooring industry as a way to compare types of hardwood flooring for both practical durability and for the wood’s ability to be nailed, sawn, planed, routed or sanded. The Janka Hardness Scale is determined by a controlled test, performed to measure the force necessary to embed a .444 inch (11.28mm) steel ball to half its diameter in wood. The Janka test measures the force required to embed a .444 inch steel ball into the wood by half its diameter. ... (Hard Maple) 1450. Spalted Maple: ... Would that be considered and if so where would it be on the scale? Red Oak, Southern. Northern Hard Maple. tween Janka hardness and the hardness modulus specified in ASTM D 1037. Southern Soft Maple. Hickory/Pecan. Janka Hardness: 1450 Hard maple is a harder and more durable variety of wood flooring. The actual number listed in the wood profile is the amount of pounds-force (lb f) or newtons (N) required to imbed a .444″ (11.28 mm) diameter steel ball into the wood to half the ball’s diameter.This number is given for wood that has been dried to … The Janka Side Hardness test measures the force required to press an 11.28mm (0.444 inch) steel ball to half its diameter cross-grain into a block of wood. Janka Hardness Scale. The Janka Hardness Test. Janka Wood Hardness Scale. Sugar maple, black maple, sweet birch, yellow birch and white ash are all strong hardwoods. Douglas Fir. Rift Sawn Hard Maple: 1450. The US typically will use lbf. Among maple, birch, poplar and ash, sweet birch has the highest specific gravity at 0.65, with a Janka measurement of 1,470. The test is performed by forcing a .444-inch steel ball into a plank of wood until half the diameter of the ball is embedded. Woods with a higher rating are … hardness. This test is one of the best measures of the ability of a wood specie to withstand denting and wear. This method leaves a hemispherical indentation with an area of 200 mm2. The 1-in. By the same token, it also is a good indicator of how hard or easy a species is to saw or nail. Janka Rating System When in doubt about the type of ... Because hardness is an important factor, and hardness varies for each species, the Janka Scale of Hardness is an excellent tool to help identify appropriate choices. It is also a good indicator of how hard or easy a species is to saw or nail. The Janka test measures the amount of force required to embed a 0.444″ steel ball into the wood to half of its diameter. Wood Hardness Chart Species (Alphabetical) Hardness Species (by Hardness) Hardness Mahogany, Honduran 800 Padauk 1725 Mahogany, Santos 2200 Tabaccowood 1750 Maple, Hard North American 1450 Rosewood, Bolivian 1780 Maple, Ivory 1500 Bamboo, Carbonized 1800 Maple, Soft 999 Hickory 1820 Merbau 1925 Pecan 1820 Mesquite 2345 Yellowheart 1820 Janka hardness testing. American Black Walnut. All these ratings have been organized onto a scale called the Janka Hardness Scale. Blue ash has the highest Janka rating at 2,030, with a specific gravity of 0.58. Northern White Oak. Northern Red Oak. It measures the force required to embed an 11.28mm (.444 in) … The Janka hardness test (from the Austrian-born emigrant Gabriel Janka, 1864–1932) measures the resistance of a sample of wood to denting and wear. The Janka Wood Hardness scale is a way to measure a wood’s resistance to dents, scratches and wear. Southern Yellow Pine. The higher the Janka rating, the more resistant that particular wood is. 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