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The Janka hardness test (English: / ˈ dʒ æ ŋ k ə /; [1] German:), created by Austrian-born American researcher Gabriel Janka (1864–1932), measures the resistance of a sample of wood to denting and wear. [citation needed] It measures the force required to embed an 11.28-millimeter-diameter (7 ⁄ 16 in) steel ball halfway into a sample of ...
Lignum vitae is hard and durable, and is also the densest wood traded (average dried density: ~79 lb/ft 3 or ~1,260 kg/m 3); [4] it will easily sink in water. On the Janka scale of hardness, which measures hardness of woods, lignum vitae ranks highest of the trade woods, with a Janka hardness of 4,390 lbf (compared with Olneya at 3,260 lbf, [5] African blackwood at 2,940 lbf, hickory at 1,820 ...
Western hemlock (Tsuga heterophylla) Huon pine, Macquarie pine (Lagarostrobos franklinii) ... Janka hardness test; List of Indian timber trees; References
Vickers hardness test; Brinell scale This page was last edited on 16 November 2024, at 12:16 (UTC). Text is available under the Creative Commons ...
Scratch hardness. The Mohs scale of mineral hardness; The Vickers hardness test; The Brinell scale; The Janka hardness test; The Rockwell scale; The Durometer scale; The Barcol scale; The Leeb rebound hardness scale; The Rosiwal scale; The Meyer hardness test; The Knoop hardness test
Hardness Conversion Table – Brinell, Rockwell,Vickers – Various steels . (archived November 11, 2011) Rockwell to Brinell conversion chart (Brinell, Rockwell A,B,C) Struers hardness conversion table (Vickers, Brinell, Rockwell B,C,D)
Its wood has a similar feel and similar tonal attributes to genuine rosewoods, but is near 1000 points softer on the Janka hardness scale on average or more than all of the commonly traded species of rosewood except for Sisso and Amazonian rosewood (Dalbergia spruceana). It also ranks lower in density of 5-10 lbs per cubic foot compared to ...
The wood is extremely hard, being one of the hardest woods in Northern America with a Janka hardness test of 1,700 lbf (7,560 N) [46] and specific gravity of 0.733 (733 kilograms per cubic metre or 45.7 pounds per cubic foot).