Scleroscope hardness number

The maximum softening is defined in terms of the Shore scleroscope number. The metal may be regarded as completely annealed when the scleroscope hardness is 4-5, this being the maximum softness from the point of view of practical rolling. Sheets having this degree of hardness, says Anderson, are as soft as is usual, though occasionally cases arise where the scleroscope number falls to 3-5. ... 

The percentage reduction of area is determined. The Shore scleroscope number shows the hardness and hence the degree of softness. The Ericlisen machine shows the suitability of the metal for further work, not only by the depth of the dome, but by the large or small appearance of the grains. The anneals were carried out in a laboratory electric furnace, temperatures being measured to the nearest 5°C., and the times being recorded. 

A t a temperature of 300°. In the case of sheets 1 to 5 (inclusive), 60 minutes will hardly suffice to give a scleroscope number of 4-5. 30 minutes suffice for sheets 6 and 7, and 20... 

Vickers hardness (/HV) Brinell hardness Rockwell hardness Scleroscope hardness number... 

Scleroscope hardness numbers are convertible to other hardness scales (see ASTM E140) (2). 

LITHIUM AND LITHIUM COMPOUNDS] (Vol 15) Scleroscope hardness numbers... 

Hardness -nos n (before 12c) (1) The resistance to local deformation. (2) Ability of a coating film, as distinct from its substrate, to resist cutting, indentation, or penetration by a hard object. An arbitrary scale of hardness is based upon ten selected minerals. For metals the diameter of the indentation made by a hardened steel sphere (Brinnell) or the height of rebound of a small drop hammer (Shore Scleroscope) serve to measure hardness. See Barcol Hardness, Brinell Hardness, Durometer, Indentation Hardness, Knoop Hardness Number,... 

Hardness is a measurement of material resistance to plastic deformation in most cases. It is a simple nondestructive technique to test material indentation resistance, scratch resistance, wear resistance, or machinability. Hardness testing can be conducted by various methods, and it has long been used in analyzing part mechanical properties. In reverse engineering, this test is also widely used to check the material heat treatment condition and strength, particularly for a noncritical part, to save costs. The hardness of a material is usually quantitatively represented by a hardness number in various scales. The most utilized scales are Brinell, Rockwell, and Vickers for bulk hardness measurements. Knoop, Vickers microhardness, and other microhardness scales are used for very small area hardness measurements. Rockwell superficial and Shore scleroscope tests are used for surface hardness measurements. Surface hardness can also be measured on a nanoscale today. 

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