The hardness of traditional bamboo flooring ranges from 1180 (carbonized horizontal) to around 1380 (natural), while newer manufacturing techniques including strand woven bamboo flooring range from 3000 to over 5000 using the Janka hardness test.
Regulating bodies such as the USBC maintain requirements for the properties of bowling balls, including size, hardness, and number of holes, as well as maintaining a list of bowling balls approved for competitive play.
Proposed by Swedish engineer Johan August Brinell in 1900, it was the first widely used and standardised hardness test in engineering and metallurgy.
The SRT4 engine had many improvements, including: stronger crank case webbing, a thicker deck with 11 mm head bolts (vs 10 mm), an oil drain back for the turbo, a cast aluminum structural oil pan, a higher capacity oil pump, a crankshaft of higher hardness steel, improved machining of bearing journals, oil squirters (to cool underside of pistons), eutectic aluminum alloy pistons made specially by Mahle, and forged connecting rods with cracked caps and 9 mm bolts.
Although large quantities of fry will incubate in waters of low hardness, most of the fry may soon contract non-infectious, constitutional dropsy, and die within a short time.
PrEN ISO 16859-1 "Metallic materials - Leeb hardness test - Part 1: Test method"
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PrEN ISO 16859-3 "Metallic materials - Leeb hardness test - Part 3: Calibration of reference test blocks"
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PrEN ISO 16859-2 "Metallic materials - Leeb hardness test - Part 2: Verification and calibration of the testing devices"
On the Janka Scale of Hardness, which measures hardness of woods, lignum vitae ranks highest of the trade woods, with a Janka hardness of 4500 lbf (compared with African Blackwood at 2940 lbf, Hickory at 1820 lbf, red oak at 1290 lbf, Yellow Pine at 690 lbf, and Balsa at 325 lbf).
Martensite, named after the German metallurgist Adolf Martens (1850–1914), most commonly refers to a very hard form of steel crystalline structure, but it can also refer to any crystal structure that is formed by diffusionless transformation.
Their common name is quebracho, from Spanish quiebra-hacha ("axe-breaker") in recognition of the hardness of their wood, or more precisely quebracho colorado ("red quebracho"), to distinguish them from the "white quebracho" trees of the quite unrelated genus Aspidosperma.
Originally, the golf course was watered from another deep well within the Park boundary at the southeast corner, but that water had such a high level of hardness that it was abandoned in 1985 and the potable-water well is now also used to serve the golf course.
The fin attachment pins and sleeves in the Convair 580 airliner were specified by the aircraft manufacturer to be hardened to a Vickers Hardness specification of 390HV5, the '5' meaning five kiloponds.
Hardness and toughness: Consistency in durability and sharpness is created in the same way as a Japanese sword.