The hardest wood is the species of the Brazilian: Cumuru (3540), Walnut (3680), cherry (2350), chestnut (3417) and koa (2160) according to the Janka scale. Janka hardness. However, there are plenty exceptions to that. The Janka Hardness Test. A common use of Janka hardness ratings is to determine whether a species is suitable for use as flooring. When asking questions about woods, it is crucial to bear in mind that a ‘good’ or ‘bad’ Janka rating is only an indication about the wood species. White Limba also goes by the name Korina, which was named by Gibson back in the 1950's to stop other instrument makers from learning their secret. Certainly one of the favourites for bodies and necks here at Ormsby Guitars. The Janka Scale: What It Is and Why It’s Important. It measures the force required to embed an 11.28 millimetres (0.444 in) diameter steel ball halfway into a sample of wood. The Janka Hardness scale is reliable but should’t be the sole barometer for your floor selection. The Janka Hardness Scale determines the hardness of a particular type of wood over another. The Brinell test is very useful for construction materials. It measures the force required to embed a 11.28 mm (0.444 in) diameter steel ball halfway into a sample of wood. 4.5 1020 alder, red Alnus rubra 2.6 590 alder, white Alnus rhombifolia andiroba Carapa guianensis 5.0 1130 angelin Andira inermis … Region: Africa Janka/Hardness: 670 lbf (2,990 N) Weight: 35 lbs/ft3 (555 kg/m3) It assesses a wood’s resistance to wear and denting by measuring the force required to embed a BB-sized steel ball halfway into a sample. Hickory / Pecan, Satinwood 1820 Afzelia / Doussie / Australian Wormy Chestnut 1810 Bangkirai 1798 Rosewood 1780 African Padauk 1725 Blackwood 1720 Merbau 1712 Kempas 1710 Black Locust 1700 Highland Beech … The test is designed to measure the resilience of the tree species by applied force. We will start with the hardest. Basswood Basics. For the sake of comparison at the bottom of the scale, white pine ranks 380. And while this example lists just some of the most popular hardwood species, there are hundreds of varieties, representing the North American hardwood population. Basswood has a Janka hardness rating of 410, which is near the soft end of the hardness scale. A common measurement for wood hardness is the Janka scale. The US typically will use lbf. Similar to a laminate AC rating, the hardwood floor hardness determines the durability of the species. 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 scale rates for density, which is a key factor in durability. While most hardwoods and softwoods will withstand normal wear and tear, all wood is susceptible to denting and other potential damage — regardless of how high or low their Janka ratings are. Our chart is based on the Janka Hardness Scale which is the industry standard for gauging the ability of various wood species to resist denting and tolerate normal wear. A very popular choice in wood flooring is Northern Red Oak, so popular that it has become the benchmark in measuring and comparing the hardness of wood flooring. The Janka scale is used to determine the relative hardness of particular domestic or exotic wood species. Red Oak, which has a Janka rating of 1260, is the industry benchmark for … janka scale pdf. Janka Events, although mainly used for hardwood species, are often used to measure the density of bamboo floors. The Janka Scale can even reveal subtle hardness differences between woods that appear to be quite similar. They rank fairly low, with a hardness of 540 pound-feet (lb-ft). White and yellow poplar are hardwoods, but they are among the softest of the hardwoods. And while this example lists just some of the most popular hardwood species, there are hundreds of varieties, representing the North American hardwood population. The scale being used is the Janka scale, developed by Gabriel Janka. Brazilian family. The Janka scale actually rates the trees by measuring hardness. The Janka test measures the necessary force to embed a .44″ diameter steel ball halfway into a piece of wood. The scale was invented in 1906 by Gabriel Janka, an Austrian wood researcher, and standardized in 1927 by the American Society for Testing and Materials ().Depending on the room where the flooring will be installed, a certain level of hardness may make it a more desirable choice. Meyer’s hardness test determined the fundamental measure of violence depending on … The Janka Scale, of course. Wood species vary in many ways, but a key factor in finishing wood is the hardness of the wood. The first thing we need to talk about is the Janka Hardness Scale. Larger force - harder wood. The hardness of wood is measured with the Janka Hardness test. Keep in mind this hardness test is done only on flat grain or plank style constructions, and the results may vary slightly if you are choosing edge or end grain construction. 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. Janka test; at 12% moisture content. The Janka hardness test measures the force required to embed a .444-inch steel ball to half its diameter into the respective wood. JANKA WOOD HARDNESS RATINGS . Generally speaking, softwoods tend to be softer than their hardwood counterparts. Ratings appear ranked from lowest to highest 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. Janka, short for the Janka Scale or Janka Hardness Rating, is a way of communicating how hard a wood is. The difference in density means red oak is also heavier than poplar. Kilonewtons: Foot Pounds-force: afromosia Pericopsis elata 7.1 1560 albarco Cariniana spp. Aromatic Cedar & Yellow Pine both qualify as medium density wood species on the Janka scale. Janka Hardness Scale ( Below downloaded from wikipedia ) Janka hardness test The Janka hardness test measures the resistance of a sample of wood to denting and wear.