For people who have nothing to do with technology and natural sciences, these four terms are synonymous. By contrast, for engineers, these four words mean completely different material properties:

For people who have nothing to do with technology and natural sciences, these four terms are synonymous. By contrast, for engineers, these four words mean completely different material properties:

I do agree with some of these explanations, but I think hardness is surface related and can be used for resisting tool wear and as very good for materials that resist wear and friction. Toughness is very good specially when we induce some materials to precipitate harden into the matrix of othet materials. Toughend materials will absorb shock load and cyclic loads such as the landing suspension in aircraft. Durability will enhance the materials to sustain loads in different environment and will be translated into long term durability if you enhance fatigue resistance.

Durability is the ability of the material to withstand environmental forces for longer life.

Toughness is the resistance against impact loads or forces (suddenly applied forces)

Hardness is the resistance of the materials against abrasive forces

Durability is not an inherent property of a building material or building component in most cases. It relates to the particular use of a material, in a particular environment. A material that is durable in a particular environment may not be durable in a different environment, or for a different use in the same environment

Of course these are different terms and have special significance for each.For a common man these are same but for engineering purposes they are having their own significance. For detailed differential understanding of these terms, you must consult any basic text book for engineering materials.

Thanks

You may want to check also: https://www.researchgate.net/post/Hardness_vs_Toughness

Dear Carlos Araujo Queiroz,

Thanks for sharing the link. It is informative.

Best regards,

Kifilideen.

I utterly agree with Dr. Popat Kumbhar's submission. Thank you for sharing this question.

The main thing here is to understand that hardness is surface characteristics and can relate to wear where the others involve the bulk of the materials

Toughness is the resistance to impact loading .

Hardness is the resistance to abrasion .

Durability is the resistance to environmental condition.

The strength of material is the ability to withstand an applied load without failure or plastic deformation

As I said before all are different. We can say toughness is related to strength since it is more related to avoiding fatigue when we have repeated cycling proved. Hardness is related to surface and wear characteristic, durability is mostly related to weathering and corrosive environment. So treatment of materials should be related to these issues.

yes but sometimes no

Again 90% of the time hardness is used to investigate surface characteristics specially if we need hard tooling for milling or drilling or we are interested in friction and wear. Toughness is related to strength and durability is used for long term sustainability in harsh environment. You should understand your application in order to apply these to specific materials without increasing the cost.

Dear respected Gabi Nehme,

Thank for the informative response to the question.

I appreciate,

Best regards,

Kifilideen.

Anytime