(redirected from brazen)
Also found in: Dictionary, Thesaurus, Legal, Financial, Idioms.


[O. Fr.,=combine], substance with metallic properties that consists of a metal fused with one or more metals or nonmetals. Alloys may be a homogeneous solid solution, a heterogeneous mixture of tiny crystals, a true chemical compound, or a mixture of these.
..... Click the link for more information.
 having copper (55%–90%) and zinc (10%–45%) as its essential components. The properties of brass vary with the proportion of copper and zinc and with the addition of small amounts of other elements, such as aluminum, lead, tin, or nickel. In general brass can be forged or hammered into various shapes, rolled into thin sheets, drawn into wires, and machined and cast. Its ductility reaches a maximum with about 30% zinc and its tensile strength with 45%—although this property varies greatly with the mechanical and heat treatment of the alloy. Cartridge brass (70% copper, 30% zinc) is used for cartridge cases, plumbing and lighting fixtures, rivets, screws, and springs. Aluminum brass (not exceeding 3% aluminum) has greater resistance to corrosion than ordinary brass. Brass containing tin (not exceeding 2%) is less liable to corrosion in seawater; it is sometimes called naval brass and is used in naval construction. Dutch metal (80%–85% copper, 15%–20% zinc) is used as a substitute for gold leaf. When iron is added to brass it produces hard, tough alloys. One of these is delta metal (55% copper, 41% zinc, 1%–3% iron, and fractional percentages of tin and manganese), which can be forged, rolled, or cast and is used for bearings, valves, and ship propellers.


Any copper alloy having zinc as the principal alloying element, but often with small quantities of other elements.
See also: Metal



a copper-based alloy in which the main additive is zinc (up to 50 percent). Brass was smelted even before the Common Era; until the late 18th century it was produced by fusion of copper with zinc ore mixed with charcoal. Only in the 19th century was this method generally replaced by direct fusion of copper with zinc.

Because of its good hot and cold pressure workability, excellent mechanical properties, attractive color, and relatively low cost, brass is the most common copper alloy. It is produced in the form of sheets, ribbons, rods, tubes, and wire (deformable brass), as well as ingots (cast brass). As the zinc content increases, the color of brass changes from reddish to light yellow. In Russia, brass was called yellow copper rather than red copper.

Simple brasses are alloys of copper only with zinc. Brasses containing up to 10 percent zinc are called tombacs; those containing 10–20 percent zinc are called half-tombacs (low brasses). These alloys, which are characterized by high corrosion resistance and plasticity, are used for making radiator and condenser pipes, as well as sheets and bands for cladding steel. Brass containing about 30 percent zinc and suitable for extensive drawing is called cartridge brass and is widely used for making parts by cold stamping, as well as by molding and drawing.

Aluminum, tin, iron, manganese, nickel, silicon, and lead (up to a total content of about 10 percent) are added to double alloys of copper with zinc to improve their mechanical, anticorrosion, and other characteristics. Multicomponent (or special) brasses are called aluminum, silicon, aluminonickel, and ferroman-ganese brasses. Brass containing about 15 percent zinc and 0.5 percent aluminum has an attractive gold color and is highly resistant to atmospheric corrosion. It is used as a substitute for gold in decorations and objets d’art. Brass with up to 1.5 percent tin added (called naval brass) has improved resistance to corrosion in seawater. The addition of lead (up to 3 percent) makes brass chips brittle and makes possible the production of very smooth surfaces by cutting. Lead brasses are used in the manufacture of motor vehicles and in clock and watch production (clock brasses).

Many brasses containing more than 20–30 percent zinc are susceptible to corrosion cracking caused by the simultaneous action of residual stresses in articles and the corrosive effect of ammonia and sulfur dioxide (in a moist atmosphere). This effect is called the seasonal sickness of brass, since increased corrosion cracking occurs in months with increased moisture in the air. Such cracking is reduced by annealing at 250°-300°C to reduce the residual stresses.

Brass is also used in general mechanical engineering, instrument-making, and heat engineering.


Smiriagin, A. P. Promyshlennye tsvetnye metally i splavy, 2nd ed. Moscow, 1956.



A British term for sulfides of iron (pyrites) in coal. Also known as brasses.
A copper-zinc alloy of varying proportions but typically containing 67% copper and 33% zinc.


1. Any copper alloy having zinc as the principal alloying element, but often with small quantities of other elements.
2. A plate of brass with memorial inscription and sometimes an effigy engraved on it, set into a church floor to mark a tomb.


1. an alloy of copper and zinc containing more than 50 per cent of copper. Alpha brass (containing less than 35 per cent of zinc) is used for most engineering materials requiring forging, pressing, etc. Alpha-beta brass (35--45 per cent zinc) is used for hot working and extrusion. Beta brass (45--50 per cent zinc) is used for castings. Small amounts of other metals, such as lead or tin, may be added
a. the large family of wind instruments including the trumpet, trombone, French horn, etc., each consisting of a brass tube blown directly by means of a cup- or funnel-shaped mouthpiece
b. instruments of this family forming a section in an orchestra
3. a renewable sleeve or bored semicylindrical shell made of brass or bronze, used as a liner for a bearing
4. Brit an engraved brass memorial tablet or plaque, set in the wall or floor of a church
References in classic literature ?
It picked its road as it went striding along, and the brazen hood that surmounted it moved to and fro with the inevitable suggestion of a head looking about.
Still the flowing stream Sweeps on, but the swift torrents of green hours Are licked into the brazen skies between Their widening banks.
There was something melancholy in this brazen voice pouring out its lamentations in the middle of the night; but each of those strokes, which made up the expected hour, vibrated harmoniously to the heart of the young man.
Ali," cried he, striking at the same time on the brazen gong.
The bugles called to each other like brazen gamecocks.
But it was well known to be a book of magic; and once, when a chambermaid had lifted it, merely to brush away the dust, the skeleton had rattled in its closet, the picture of the young lady had stepped one foot upon the floor, and several ghastly faces had peeped forth from the mirror; while the brazen head of Hippocrates frowned, and said,--"Forbear
For, though it walked, and made other lifelike motions, there yet was a kind of jerk in its gait, which, together with its brazen aspect, caused the young prince to suspect that it was no true giant, but only a wonderful piece of machinery.
Grounds I you shall have them; and turn to the light that I may see your brazen face blush black, when you hear yourself proved to be a liar and a hypocrite.
green guavas, seeds, and berries were flying about in every direction, and during this dangerous state of affairs I was half afraid that, like the man and his brazen bull, I should fall a victim to my own ingenuity.
The trumpet's brazen throat should pour heavenly music over the earth, and the herald's voice go forth with the sweetness of an angel's accents, as if to summon each upright man to his reward.
Its pendulum swung to and fro with a dull, heavy, monotonous clang; and when the minute-hand made the circuit of the face, and the hour was to be stricken, there came from the brazen lungs of the clock a sound which was clear and loud and deep and exceedingly musical, but of so peculiar a note and emphasis that, at each lapse of an hour, the musicians of the orchestra were constrained to pause, momentarily, in their performance, to harken to the sound; and thus the waltzers perforce ceased their evolutions; and there was a brief disconcert of the whole gay company; and, while the chimes of the clock yet rang, it was observed that the giddiest grew pale, and the more aged and sedate passed their hands over their brows as if in confused revery or meditation.
It grew dark, and they put candles on the tables--candles set in bright, new, brazen candlesticks.