hardness
Definition 1
Resistance of a material to deformation, indentation, or penetration by means such as abrasion, drilling, impact, scratching, and/or wear, measured by hardness tests such as Brinell, Knoop, Rockwell, or Vickers. Since there is no standard hardness scale, each test expresses its results in its unique (and arbitrarily defined) measure. For some metals (such as steel) the hardness and tensile strength are empirically related. Hardness of pliable materials such as plastics and rubbers is measured by instruments such as durometer. See also Mohs' hardness scale.
Definition 2
Measure of the quantity of dissolved minerals in water. See hard water for details.
email to a friend
print this definition
cite this definition
link to this page
hardness is in the Industries, Manufacturing, & Technology subject.
hardness appears in the definitions of the following terms:
heat treatment,
carbon,
quality,
physical characteristics,
Knoop hardness (KH),
diamond pyramid hardness (DPH),
temper,
pencil hardness,
quantitative,
Rockwell hardness (RH)
and
hardness appears in these other terms: Mohs' hardness scale, Brinell hardness (BH) test, water hardness, grains hardness
This content can be found on the following page:
http://www.businessdictionary.com/definition/hardness.html