Brass HoleBy Robbie Pham

What is Brass?•Different types of

Brass•Must contain

varying amounts of copper and zinc

•Copper typically in highest quantity

•Properties of brass include:▫Characteristic gold color▫Malleable (hammered into sheets)▫Resistant to corrosion▫Acoustic properties (musical instruments)▫Nonmagnetic

•Different elements added to change properties of brass▫Tin or aluminum

( harder and corrosion resistant)

▫Combinations of aluminum, iron, silicon, and manganese for wear and tear resistance

Brass in Time•Very difficult to make due to melting point

of zinc•Copper was ground and melted with ores

containing zinc•Used in:

▫Jewelry▫Helmets▫Coins▫Church decorations and mirrors▫Clocks▫Navigational aids

•Brazen bull was torture device that took advantage of heat conducting properties of brass

•Set of tubes and pipes could be used to make screams seem like cow sounds

Brass Today•Easily

manufactured•Fittings (bolts and

nuts)•Fixtures

(doorknobs, locks) ▫Doorknobs in

hospitals because bacteria die within eight hours

• Rifle cartridges• Musical instruments