View example sentences, synonyms and word forms for Hardness.
Hardness meaning
The quality of being hard. | An instance of this quality; hardship. | The quantity of calcium carbonate dissolved in water, usually expressed in parts per million (ppm).
Example sentences (20)
Dyar and Gunter, pp. 32–39 Chesterman and Lowe, p. 38 Hardness main Diamond is the hardest natural material, and has a Mohs hardness of 10. The hardness of a mineral defines how much it can resist scratching.
Its hardness is theoretically superior to that of cubic diamond (up to 58% more) according to computational simulations but natural specimens exhibited somewhat lower hardness through a large range of values (from 7 to 8 on Mohs hardness scale ).
A handheld hardness tester is one such instrument that allows engineers and quality controllers to measure material hardness accurately.
Among the natural gems only moissanite and diamond are harder, with diamond having a Mohs hardness of 10.0 and moissanite falling somewhere in between corundum (ruby) and diamond in hardness.
Kamacite can vary in hardness based on the extent of shock it has gone under but commonly it is said to rank a four on the mohs hardness scale.
Step 20: Test reman crankshaft Rockwell hardness Next the technician checks the industry standard hardness.
A hardness of 7 indicates that rose quartz is capable of scratching glass and softer minerals, but it can still be scratched by harder materials like corundum (which includes sapphires and rubies) and diamond.
Hardness of water depends on how much of those minerals carry your water.
He expressed worry about the quality of ground water in some parts of the country, saying at least 30 per cent of such water sources had high levels of iron, manganese, fluoride, arsenic and hardness.
It includes heating the sharp edge to high temperatures and afterward cooling it to make differential hardness.
The Mr.Shield three-pack of tempered glass screen protectors offers impressive value, with 9H hardness ballistic Japan Glass for maximum strength against impacts and scratches.
Tooth enamel ranks somewhere between steel and titanium in terms of hardness, but its strength comes from the mineral content, especially the calcium, and this is leached out by acids.
We learn, too, of the Mohs Scale that judges hardness, a logarithmic affair where diamond (at the top, scoring 10) can scratch corundum (nine) all the way down to talc (one).
With its resistance of 223 Vickers, this alloy is 50-per-cent more resistant to abrasion than conventional steels and has a unique hardness.
It has a water hardness score of 320, placing it in the ‘very hard’ category.
That said, if you're looking to get a desk mat for your regular home or office desk, the hardness or softness may simply boil down to preference.
The drill met refusal due to ground hardness at 38m depth and could not be advanced further.
We have all the same three pitches now (at the stadium and Ryton) and we know the hardness of them and are monitoring everything very carefully.
In “White Mountain,” the same admixture congeals into a dry, mineral hardness.
The MOHS hardness is shown for each of the more common gemstones.