hardness Hear it!

hardness Definition

hard·ness (härd′nis)

noun

  1. the state or quality of being hard (in various senses)
  2. the relative capacity of a substance for scratching another or for being scratched or indented by another

hardness Usage Examples

Preposition: of

  • heart: The issue here is the hardness of the heart.
  • steel: The hardness of steel is measured in degrees on the Rockwell Scale.

Converse of object

  • endure: All who would be loyal to our Lord must expect to endure hardness for Him.
  • determine: The difference in the shear modulus has been suggested as the main factor in determining the hardness of the multilayer system.
  • combine: Unusually, it combines this hardness with a degree of toughness, so the deposit can stand up to high stress contact.

Adjective modifier

  • temporary: Temporary hardness is removed by heating the water near to boiling.
  • permanent: The " permanent hardness " given by sulfate, chloride or nitrate salts cannot be removed by boiling.
  • extreme: The problem is the extreme hardness of the ' cap ' , thus the Kango.
  • increased: Hardness: Increased hardness was apparent on the plaster of Paris samples.
  • total: There is no maximum value for total hardness of water supplies.

Modifies a noun

  • ratio: Thus, higher values of the hardness ratio indicate a harder spectrum.
  • tester: Operation and maintenance of hardness testers, tensile testing machines.
  • testing: The tests were performed in a Vickers hardness testing machine with a loading cycle of 12 s using a diamond pyramid indenter.
  • scale: Rockwell Hardness The Vickers hardness scale is not the only scale used to measure hardness in metals.

Noun used with modifier

  • indentation: Recently, with the introduction of instrumented indentation hardness, it has become possible to measure the indent under the applied force.
  • carbonate: If the carbonate hardness is low, a small amount of new acid will make a large change to the body's pH.
  • calcium: In a tiled pool the calcium hardness should be kept above 200 parts per million.
  • radiation: Unexpectedly, the radiation hardness has been found to be worse than silicon under charged hadron irradiation.
  • surface: The fatigue resistance can also be related to the surface hardness of the gear.
  • water: These effects of water hardness are not harmful to health.