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amalgam amalgam
amalgam , alloy containing mercury . The alloy may be liquid or solid, depending on the proportion of mercury, although all naturally occurring amalgams, i.e., those of gold and silver, are solid. Amalgams are widely used. Silver, gold, and copper amalgams are used in dentistry, and tin amalgam... Read more
duralumin duralumin
duralumin , alloy of aluminum (over 90%) with copper (about 4%), magnesium (0.5%-1%), and manganese (less than l%). Before a final heat treatment the alloy is ductile and malleable; after heat treatment a reaction between the aluminum and magnesium produces increased hardness and tensile strength.... Read more
silicon silicon
silicon nonmetallic chemical element; symbol Si; at. no. 14; at. wt. 28.0855; m.p. 1,410°C; b.p. 2,355°C; sp. gr. 2.33 at 25°C; valence usually +4. Silicon is the element directly below carbon and above germanium in Group 14 of the periodic table . It is more metallic in its properties... Read more
brass brass
brass alloy 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... Read more
tetraethyl lead tetraethyl lead
tetraethyl lead , (C 2 H 5 ) 4 Pb, viscous, colorless, poisonous liquid. It is an organometallic compound prepared by reacting ethyl chloride with a sodium-lead alloy. When added to gasoline, it improves the combustion characteristics (see octane number ). When tetraethyl lead burns in an engine,... Read more
alloy alloy
alloy [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. Alloys are used more extensively... Read more
antimony antimony
antimony [Lat. antimoneum ], semimetallic chemical element; symbol Sb [Lat. stibium, =a mark]; at. no. 51; at. wt. 121.75; m.p. 630.74°C; b.p. 1,750°C; sp. gr. (metallic form) 6.69 at 20°C; valence 0, +3, -3, or +5. Antimony exists in two allotropic forms (see allotropy ); the more... Read more
germanium germanium
germanium [from Germany ], semimetallic chemical element; symbol Ge; at. no. 32; at. wt. 72.59; m.p. 937.4°C; b.p. 2,830°C; sp. gr. 5.323 at 25°C; valence +2 or +4. Pure germanium is a lustrous, gray-white, brittle metalloid with a diamondlike crystalline structure. It is similar in... Read more
type metal type metal
type metal alloy of lead with antimony, tin, and sometimes copper, so named because of its one time extensive use for making printing type. Expanding upon solidification, the alloy takes a fine and clear impression of the mold in which it hardens. It has a low melting point. Once used extensively... Read more
assaying assaying
assaying , in metallurgy, process of determining the specific metallic content of an ore, alloy, or other substance, especially one containing precious metals. It consists, in some cases, of subjecting the substance to complete chemical analysis and, in others, of simply determining the quantity... Read more

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Casting Answers & Advice.
Magazine article from: Modern Casting ...red brass alloy in the ladle...in copper alloys. Because of the high solubility of hydrogen (H) in the liquid state of copper...Because the solubility of H in the...the solid solubility limit and...purged with ...

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