Metals

Question 1

Ferrous metals

Answer 1

Contain iron
Prone to rusting if exposed to moisture
Magnetic properties
Relatively high melting point - iron content
Therefore require specialised equipment to cast products
Readily recyclable

Question 2

Ferrous metals examples

Answer 2

Mild steel
Carbon steel
Cast iron

Question 3

Mild steel

Answer 3

Ferrous metal

Ductile
Malleable
Will rust quickly if in frequent contact with water

Nuts n bolts
Car bodies
Gates etc

Question 4

Carbon steel

Answer 4

Very strong
Hard
Restaurant to abrasion

Hand tools eg screwidrivers, hammers, chisels , saws etc

Question 5

Cast iron

Answer 5

Very strong when in compression
Very brittle

Car brake discs
Metalwork vices
Machinery based eg pillar drill

Question 6

Non ferrous metals

Answer 6

Do not contain iron
Resistant to corrosion and rust - no oxide layers form on the surface of these metals
Do not have magnetic properties

Question 7

Aluminium

Answer 7

Non ferrous metal

Can be formed in a variety of shapes using a range of processes eg:
Press forming 
Rolling 
Bending 
Extrusion 
Stamping 
Casting 
machining 

Excellent strength to weight ratio
Lightweight
Easily machined using manual and Cnc equipment
100% recyclable

Window frames
Ladders
Expensive bicycles

Question 8

Copper

Answer 8

Ductile and malleable
Conductor of heat and electricity
Red brown colour

Electrical components
Cookware
Plumbing
Roof coverings

Question 9

Zinc

Answer 9

Very weak material
Very resistant to corrosion

Used to galvanise steel
Coating on screws
Steel buckets
American cents

Question 10

Tin

Answer 10

Ductile
Malleable
Resistant to corrosion from moisture
Bright silver

Tin foil
Soldering
Coating on food cans
Whistles

Question 11

Non ferrous metals examples

Answer 11

Aluminium
Copper
Zinc

Question 12

Alloys

Answer 12

When 2 or more metals are mixed together in order to obtain the properties of the individual metals

Mixtures can change depending on the materials use and how it will be processed

Question 13

Examples of alloys

Answer 13

Stainless steel
Duralumin
Brass

Question 14

Stainless steel

Answer 14

Ferrous alloy - 90% steel and also includes chrome and nickel

By mixing chrome and nickel the new metal becomes non magnetic

Does not corrode
Resistant to wear

Non reactive - used extensively in food processing, cooking and utensils

Question 15

Duralumin

Answer 15

Non ferrous- aluminium alloy

Easy machinability
Can be heat treated
Excellent mechanical structure- both light weight and strong

Used extensively in aviation, mainly air frames

Question 16

Brass

Answer 16

Non ferrous - mixture of copper and zinc
Easily cast into shapes - complex shapes can be made
Very aesthetically pleasing - can be polished very highly

Used often in plumbing industry and fishing industry
Valves and taps
Where pipework is exposed to exterior moisture