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Dt > Metals > Flashcards

Metals Flashcards

1
Q

What is metal

A

It is a natural occurring material which is mined from the ground inthe form of ore

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2
Q

How do we get from ore to metal

A

Raw metal is extracted from ore through crushing, smelting and heating with the addition of chemicalsand huge amounts of energy

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3
Q

What are the two main groups of metals

A

Ferrous and non ferrous

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4
Q

What are ferrous metals

A

Those containing iron

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5
Q

Main characteristics of ferrous metals

A

Magnetic
Prone to corrosion (due to carbon content)
Hardness and malleability

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6
Q

What are metal hardness and malleability linked to

A

Its carbon content

More carbon means harder and less malleable

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7
Q

Examples of ferrous metals

A

Cast iron
Low carbon steel
High carbon steel or tool steel

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8
Q

Composition of cast iron

A

Iron and 35% of carbon

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9
Q

Composition of low carbon steel

A

Iron and 0.15 - 0.35% carbon

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10
Q

Composition of high carbon steel

A

0.70 - 1.4% carbon and iron

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11
Q

What is the most widely used of ferrous metals

A

Low carbon

It is widely used in the constructi9n industry

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12
Q

Cast iron properties and common uses

A

Cheap, hard surface but brittle core

Car brake disks, manhole covers

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13
Q

Low carbon steel properties and common uses

A

Tough, malleable, poor restance to corrosion

Nuts, bolts, car bodies

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14
Q

High carbon properties and common uses

A

Hard but also brittle

Screwdrivers, chisels

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15
Q

Properties of non ferrous metals

A

Resistance to corrosion
Malleable
Not magnetic

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16
Q

Example od non ferrous metals

A

Alluminium
Copper
Zinc
Tin

17
Q

Properties and common uses of alluminium

A

Soft, lightweight, good conductorbof heat and elecricity, corroson resistant
Bike frames, cooking pans, aircraft bodies

18
Q

Properties and common uses of copper

A

Ductile, malleable, corrosion resitant

Plumbing

19
Q

Properties and common uses of zinc

A

High corrosion resistance, low melting point, easy to work

Crash barries, corrugated roofing

20
Q

Properties and common uses of tin

A

Low melting point, excellent corrosion resistance, malleable

Cans

21
Q

What are alloys

A

Alloy is a material produced by combining two or more elements together

22
Q

Examples of alloys

A

Brass
Staineless steel
Duralumin

Dt (3 decks)

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