Results for steel

Definitions of steel:

part of speech: noun

Any instrument of steel: an instrument of steel for sharpening knives on: extreme hardness: a chalybeate medicine: iron combined with a small portion of carbon. Steel usually contains also small quantities of silicon, phosphorus, manganese, and sulphur, but iron and carbon appear to be its only essential constituents. The relative proportions of iron and carbon vary in steel of different qualities; but in that used for ordinary purposes the carbon amounts from about 0. 5 to 1. 5 per cent, the toughness, tenacity, and hardness increasing with the increase of the carbon, the elasticity diminishing as the hardness increases, and vice versa. At a red heat steel is malleable and may be welded. The color is a bright grayish white, the texture closely granular, the specific gravity varying from 7. 62 to 7. 81. Steel formed from bar- iron by cementation is called blistered steel, from its surface acquiring a blistered character in the process. When blistered steel is rolled or beaten down into bars, it is called shear- steel, and if it be melted, cast into ingots, and again rolled out into bars, it forms cast- steel. Natural or German steel is an impure and variable kind of steel procured from cast- iron, or obtained at once from the ore. The natural steel yielded by cast- iron, manufactured in the refining houses, is known by the general name of furnace steel, and that which has only been once treated with a refining furnace is particularly called rough steel. The peculiarity of steel, upon which its high value in the arts in a great measure depends, is its property of becoming hard after being heated to redness and then suddenly cooled by being plunged into cold water, and of being again softened down to any requisite degree by the application of a certain temperature. This process is called tempering. It is found that the higher the temperature to which steel is raised, and the more sudden the cooling, the greater is the hardness; and hence, any degree of hardness can be given to steel which is required for the various purposes to which it is applied. According to the degree of hardness to which steel is tempered it assumes various colors, and formerly these colors served as guides to the workman. Now, however, a thermometer, with a bath of mercury or oil, is employed, and the operation of tempering is performed with a much greater degree of certainty. The uses of steel in forming various kinds of instruments, edge- tools, springs, etc, are well known.

part of speech: verb

To point or overlay with steel; to make very hard; to make insensible or obdurate.

part of speech: adjective

Made of steel.

part of speech: verb transitive

To overlay or edge with steel: to harden: to make obdurate.

part of speech: noun

A variety of iron refined and combined with a small portion of carbon, very tough, hard, and elastic; any instrument or weapon made of steel.

part of speech: noun

Iron refined and combined with carbon, used in making edge- tools, & c.; weapons made of steel, as swords; an instr. used by butchers and others for sharpening their knives.

part of speech: adjective

Made of, or like, steel; hence, hard; unfeeling.

part of speech: verb transitive

To overlay, edge, or tip with steel; make hard, strong, or unfeeling; as, to steel one's heart.

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