Hardness vs. Toughness

Hardnessnoun

The quality of being hard.

Hardnessnoun

An instance of this quality; hardship.

Hardnessnoun

(inorganic chemistry) The quantity of calcium carbonate dissolved in water, usually expressed in parts per million (ppm).

Hardnessnoun

The resistance to scratching, cutting, indentation or abrasion of a metal or other solid material.

Hardnessnoun

(physics) The penetrating ability of electromagnetic radiation, such as x-rays; generally, the shorter the wavelength, the harder and more penetrating the radiation.

Hardnessnoun

The measure of resistance to damage of a facility, equipment, installation, or telecommunications infrastructure when subjected to attack.

Hardnessnoun

The quality or state of being hard, literally or figuratively.

Hardnessnoun

The cohesion of the particles on the surface of a body, determined by its capacity to scratch another, or be itself scratched; - measured among minerals on a scale of which diamond and talc form the extremes.

Hardnessnoun

The peculiar quality exhibited by water which has mineral salts dissolved in it. Such water forms an insoluble compound with soap, and is hence unfit for washing purposes.

Hardnessnoun

the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale

Hardnessnoun

devoid of passion or feeling

Hardnessnoun

the quality of being difficult to do;

Hardnessnoun

excessive sternness;

Hardness

Hardness is a measure of the resistance to localized plastic deformation induced by either mechanical indentation or abrasion. In general, different materials differ in their hardness; for example hard metals such as titanium and beryllium are harder than soft metals such as sodium and metallic tin, or wood and common plastics.

Toughnessnoun

(uncountable) The state of being tough

Toughnessnoun

Resistance to fracture when stressed

Toughnessnoun

A formidable difficulty

Toughnessnoun

The quality or state of being tough.

Toughnessnoun

enduring strength and energy

Toughnessnoun

the property of being big and strong

Toughnessnoun

the elasticity and hardness of a metal object; its ability to absorb considerable energy before cracking

Toughnessnoun

impressive difficulty

Toughness

In materials science and metallurgy, toughness is the ability of a material to absorb energy and plastically deform without fracturing. One definition of material toughness is the amount of energy per unit volume that a material can absorb before rupturing.