ASSIGNMENTAlloy An alloy is a mixture or metallic solid solution composed of two or more elements

COPPER: *reddish brown color in colour . *Copper-based alloys have lower melting points than steel or iron,

PROPERTIES:• An excellent electrical conductor

• tough

• An excellent thermal conductor

• non-magnetic

• corrosion resistant • an attractive colour

• anti-bacterial • easy to alloy

• easily joined • recyclable

• ductile • catalytic

 USES*Copper wires allow electric current to flow without much loss of energy.*AUTOMOBILES*  water pipes, *electric bells* ELECTRIC I NSTRUMENT,* MUSICal instrument.

 Brass

Brass is an alloy of copper and zinc. The zinc content can vary between few % to about 40%

PROPERTIES.*Brass has a muted yellow color which is somewhat similar to gold. *It is relatively resistant to tarnishing, *Brass has higher malleability than bronze or zinc. *The relatively low melting point of brass (900 to 940°C, depending on composition) *Today almost 90% of all brass alloys are recycled.* Aluminium makes brass stronger and more corrosion resistant.

USES  *IT is often used as decoration and for coins. . * for applications where low friction is required such as locks, gears and valves; *extensively in musical instruments such as horns and bells for its acoustic properties.* for electrical applications.

Bronze Bronze is a metal alloy  with tin as the main additive. modern bronze is typically 88% copper and 12% tin

PROPERTIES* It is hard and brittle,*generally about 10 percent heavier than steelBronzes are softer and weaker than steel*Bronze resists corrosion (especially seawater corrosion) *Is also a better conductor of heat and electricity than most steels.The melting point of Bronze is about 950 °C (Bronze is nonmagnetic

Many common bronze alloys have the unusual and very desirable property of expanding slightly just before they set, thus filling in the finest details of a mold.

Uses*Bronze was especially suitable for use in boat and ship fittings resistance to salt water corrosion. *Bronze is still commonly used in ship propellers and submerged bearings.*used for bearings, clips, electrical connectors and springs. *bronze  comes in rolls of thin sheets *FOR MAKING hammers, 

Precious metal alloysCopper is often alloyed with precious metals like silver and gold, to create, for example, hepatizon, tumbaga  ………

TumbagaTumbaga  alloy of gold and copper .. The proportion 97%copper OR copper (80%), silver (15%), and gold (5%).

PROPERTIES*It has a significantly lower melting point than gold or copper alone.* It is harder than copper, but maintains malleability after being pounded.

Use *Tumbaga was widely used by the pre-Columbian cultures of Central America to make religious objects.* Like most gold alloys, tumbaga was versatile and could be cast soldered, welded, plated, hardened, polished, embossed.Hepatizon

Hepatizon ("liver"), is thought to be an alloy of copper with the addition of a small proportion of gold and silver (perhaps as little as 8% of each), , similar to the colour of liver. As a result of its dark colour,

it was particularly valued for statues

OTHERALLOYS:

1)Nickel silverNickel silver, also known as German silver, new silver, nickel brass, is a copper alloy with nickel and oftenzinc. The usual formulation is 60% copper, 20% nickel and 20% zinc. Nickel silver is named for its silvery appearance,

PROPERTIESits corrosion resistanceGLOSSY

Uses*silver-plated cutlery * jewellery, *for making musical instruments (e.g., cymbals,saxophones),* It is widely used in the production of coins *benefit is that nickel silver does not require a lacquer finish.

2)MolybdochalkosMolybdochalkos is an alloy of copper and lead. It was known by Greek alchemists as early as the 10th century.

Cupronickel Cupronickel or copper-nickel or "cupernickel" is an alloy of copper that contains nickel and strengthening elements,

such as iron andmanganese. A typical mix is 75% copper, 25% nickel, and a trace amount of manganese. .IT contain the 55% copper-45% nickel alloy constantan

PROPERTIESCupronickel is highly resistant to corrosion in seawater, HIGH HEAT CONDUCTANCE

USES:*it is used for piping, heat exchangers and condensers in seawater systems as well as marine hardware,*It is commonly used for mechanical and electrical equipment, medical equipment,* jewelry items, * material for strings for string instruments.*For high-quality cylinder lock and locking systems,