hardness number


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Related to hardness number: Rockwell Hardness Number

hardness number

[′härd·nəs ‚nəm·bər]
(engineering)
A number representing the relative hardness of a mineral, metal, or other material as determined by any of more than 30 different hardness tests.
References in periodicals archive ?
Group V Saline (Control) Table 2 : List of Mean & Standard Deviation of VICKERS HARDNESS NUMBER of the test groups Group Before After Treatment Treatment I.
The Rockwell hardness number is a measure of the non-recoverable indentation after a heavy load of 588N for a period of 15s, and subsequently reduced to a minor load of 98N for another duration of 15 s.
Q Our customer requires a Brinell hardness number (BHN) of 85 on an A356-T6 sand casting, and our tests show measurements as low as 57 under the riser.
The measured hardness number was basically defined as the quotient of the applied load divided by the indentation surface area.
The first ladle, poured immediately at 2750F showed primarily size 4-5 Type A graphite in a medium spaced pearlitic matrix having an average tensile strength of 34,000 psi and an average Brinell hardness number of 190.