What is the unit to represent hardness of material in the industry?
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There are several alternative definitions of indentation hardness, the most common of which are:\n\nBrinell hardness test (HB) \nJanka Wood Hardness Rating \nKnoop hardness test (HK) or microhardness test, for measurement over small areas \nMeyer hardness test \nRockwell hardness test (HR), principally used in the USA \nShore durometer hardness, used for polymers \nVickers hardness test (HV), has one of the widest scales \n\nHowever i must say that in industry the only one i have used is Rockwell in the C Scale (Metals, steel mostly).  But I've heard Brinell is also very usefull.  \n\nIn your case HRA means Rockwell hardness in Scale A.  This A, B, C in Rockwell are just scales ok? Because some materials are not too hard so in a Rockwell C scale the result would be a very small number in comparison with a steel with superficial teatment that comes to around 60 Rockwell C (just an example)\n\ncheck this link for more information on hardness.
188870
a scale or balence that uses grams
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tensile strength = (2*P)/(pi*t*d)\nwhere; P =maximum load you get from the machine(kPa); pi = 3.14; t = thickness/height of specimen (m) and d = diameter of specimen(m)
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Fracture toughness  \nUnit Name Symbol SI Equivalent  \n· ksi-sqrt(inch)  \n ksi-sqrt(in)  1.09884x106 Pa-sqrt(m)  \n· MPa-sqrt(meter)  \n MPa-sqrt(m)  1x106 Pa-sqrt(m)  \n· Pa-sqrt(meter)  \n Pa-sqrt(m)  1 Pa-sqrt(m)  \n· psi-sqrt(inch)  \n psi-sqrt(in)  1098.84 Pa-sqrt(m)
588958
the weight will be according 2 density of the material \n\nfor example for water 1  liter wighs 1 kg
491377
The cost of a given unit of a product.
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GPa and MPa (giga-pascal [1E9 pascals] and mega-pascal [1E6 pascals])  are metric units of stress. (6.89 Mpa = 1 ksi [1000 psi - pounds per square inch])(1 Pa = 1 newton / meter^2)\n\nUsually fibers are tested in 'tows' bundles of maybe 1000 fibers. In order to know what force they can sustain given a tensile strength you just multiply the tensile strength by the cross-sectional area of the fibers.
678328
the current #1 strength by ultimate tensile strength is Carpenter Micro-Melt® 10 Tough Treated Tool Steel (AISI A11) as quoted by www.matweb.com, with a UTS of 5205 MPa.  This material is an alloy of: \nComponent    Wt. %  \n \n \nC 2.4 - 2.5   \nCr 4.75 - 5.75   \nFe 78.21 - 81.35   \nMn 0.35 - 0.6   \nMo 1.1 - 1.5   \nS 0.05 - 0.09   \nSi 0.75 - 1.1   \nV 9.25 - 10.25   \n\nIt is obviously a quite complex alloy.  Most other ultra high strength materials are also iron alloys, check matweb for the specifics
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see first u must understand that aisi,astm,en,jis,din all the standards are distinguish as per composition of a steel.\n\nso as per the customer requirement we are developig a standard of a steel.If it answers to a already available standard such as jis,bin,is,etc etc we are following that..\n\nso we must follow the P - no of the steel specified by ASME sec IX..that is the major classification which is globally followed
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this question belongs in the earth sciences category.  this is not a question about astronomy.\n\nhttp://en.wikipedia.org/wiki/Astronomy\n\nyes, the answer is hardness.
968993
Color, shape, hardness, melting point, boiling point, density
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You would have to look into the properties for AMS, ASTM, AISI, ASME, Federal, Mil and SAE steels. It all depends on what type of steel you are using. Stainless, mild and what type of hardness (1/2 or 1/4 for stainless) that you need and what the purpose of the part is going to be used for
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Try looking at a substances MSDS.  That is Material Data Safety Sheet.  If it is a pure substance that will be helpful. Just put the name of the substance and MSDS into yahoo and you'll find a sheet
16361
Color, feel, and hardness are the main ones.
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Hello, You might find this useful :o)\n\n\nDouble Shear Strength\n(Cold Drawn – 0.442” [11.23 mm] start size)\n\n% Cold DrawnShear Strength, ksi (MPa)\n1089 (614)\n2098 (676)\n30106 (731)\n40113 (779)\n50122 (841)\n60130 (896)\n\nCondition     Size   Double Shear \n                             Strength ksi (MPa)\nAnnealed   3/8” Ø (9.6 mm)     86 (593)\n \nNitronic 60 Austentic Stainless, 40% Cold Worked\n\nComponent    Wt. %  \n \nCr 17   \nFe 62   \nMn 8   \nN  0.14   \nNi 8.5   \nSi 4   \n \nDensity 7.62 g/cc 0.275 lb/in³   \n\nMechanical Properties \n  \nHardness, Brinell = 346 (Estimated from Rockwell C)\nHardness, Knoop = 413 (Estimated from Rockwell C)\nHardness, Rockwell A = 69.5 (Estimated from Rockwell C) \nHardness, Rockwell C = 38 \nHardness, Vickers = 362 (Estimated from Rockwell C) \nTensile Strength, Ultimate = 1345 MPa (195000 psi)   \nTensile Strength, Yield = 1055 MPa (153000 psi)  0.2% Offset \nElongation at Break = 20 %\nReduction of Area = 57 %\nModulus of Elasticity = 179 GPa (26000 ksi)  In Tension \nPoisson's Ratio = 0.3\nShear Modulus = 69 GPa (10000 ksi)\n\n\nThanks!\n\nMorgan :o)
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Symbol is the Greek letter Rho ρ\nUnits are: kilogram per cubic metre (kg·m-3)
384173
Here is an online interactive table that gives the x-ray absorption properties of most elements.  If you input the x-ray energy, it will tell you the absorption coefficient and the 1/mu of the material.  1/mu is the thickness of material it takes to reduce the x-ray intensity by 37%.  The lower the 1/mu of the atom, the more impenetrable it is.