Metals

Question 1

Metal properties

Answer 1

Mechanical + physical

Question 2

Mechanical

Answer 2

How a material reacts to a particular type of force (tension, compression, shear)

Question 3

Physical

Answer 3

How a material reacts to a specific condition (environmental or electrical conditions) due to its atomic structure or make up

Question 4

Stainless steel

Answer 4

Is a steel alloy with a very high corrosion resistance compared to carbon/ alloy steel.
Ingredients include chromium, nickel and molybdenum

Question 5

Advantages of stainless steel

Answer 5

• excellent corrosion resistant
• excellent fracture toughness
• excellent hardness characteristics
• high and low temperature resistant
• strong and durable
• easy to clean and maintain

Question 6

Disadvantages of stainless steel

Answer 6

• expensive
• hard to machine or weld

Question 7

Low, medium, high carbon steel

Answer 7

• low carbon steel consists of less than 0.30% of carbon
• medium carbon steel consists of 0.30-0.60% of carbon
• high carbon steel contains more than 0.60% of carbon

Question 8

Advantages and disadvantages of low carbon steel

Answer 8

Advantages:
- strong and durable
- easy to work with (cut, drill, shape and form)
- recyclable and sustainable
Disadvantages:
- harder to weld as it has a higher melting point

Question 9

Advantages and disadvantages of medium carbon steel

Answer 9

Advantages:
- high strength
- resistance to wear and tough
Disadvantages:
- it can’t be easily bent and moulded into different shapes

Question 10

Advantages and disadvantages of high carbon steel

Answer 10

Advantages:
- strong and highly durable
- high and low temperature resistant
Disadvantages:
- difficult to work with
- very brittle

Question 11

Cast iron

Answer 11

Is a class of iron and carbon alloys with a carbon content of more than 6%
Uses: pipes, machines, cooking pans and gates

Question 12

Advantages of Cast iron

Answer 12

• high wear resistant
• good machinability
• low notch sensitivity

Question 13

Disadvantages of cast iron

Answer 13

• High maintenance
• heavy weight

Question 14

Aluminium

Answer 14

Is a silvery-white metal. Used in a huge variety of products such as; cans, foil, kitchen utensils and window frames.

Question 15

Advantages of aluminium

Answer 15

• corrosion resistant
• electrical and thermal conductor
• reflectivity and ductility
• recyclability

Question 16

Disadvantages of aluminium

Answer 16

• it is not particularly strong
• expensive compared to other steels with the same strength

Question 17

Copper

Answer 17

Reddish, extremely ductile metal.

Question 18

Advantages of copper

Answer 18

-copper is is lightweight so makes it easier to work with as easy to carry around.
-It is also economical and formable which makes it easy to bend and use whilst working.its also 100% recyclable.

Question 19

Disadvantages of copper

Answer 19

• it is prone to corrosion which can lead to safety risks if it is used in certain applications
  -Also it is not as strong as other metals which means it may not be suitable for use in high stress situations

Question 20

Zinc

Answer 20

• Zinc is a bluish white metallic element that is commonly found in minerals and is used especially in alloys and as a protective coating for iron and steel.
• The main use of zinc is coating to protect iron and steel from corrosion. Zinc becomes ductile and malleable when heated, it is also brittle before being heated.

Question 21

Advantages of zinc

Answer 21

• corrosion resistant
• malleable
• electrically and thermally conductive
• low cost.

Question 22

Disadvantages of zinc

Answer 22

susceptible to more rust when exposed to moisture.

Question 23

Tim

Answer 23

• Tin is a soft, silvery white metal with a bluish tinge. - - -Tin is also used to coat other metals to prevent corrosion( glass production, bearing alloys, coatings for steel containers, solders for connecting pipes or electrical circuits).

Question 24

Advantages of tin

Answer 24

-tin is soft, ductile and malleable.
-Also tin is very flexible
- can easily be moulded and stretched into different shapes.

Question 25

Disadvantages of tin

Answer 25

tin can corrode when comes in contact with copper.

Question 26

Titanium

Answer 26

-Titanium is a silvery grey light strong metallic metal. It is used to create aeroplane wings, blades, air frames and turbine discs. -Properties of titanium is it is corrosion resistant, low density and high melting point.

Question 27

Advantages of titanium

Answer 27

- corrosion resistant - high temperature resistant - environmental sustainability.

Question 28

Disadvantages of titanium

Answer 28

- brittle - more susceptible to cracking - not suitable in temperatures over 400 degrees, it will lose its strength

Question 29

Duralumin

Answer 29

- A hard, light alloy of aluminium with copper and other elements. Duralumin is a relatively soft, ductile and workable in the normal state.

Question 30

Advantages of duralumin

Answer 30

- workable in normal state, this is helpful as it allows it to be bent or moulded into a shape - also lightweight which makes it easier to work with.

Question 31

Disadvantages of duralumin

Answer 31

- less resistant to corrosion, more likely to corrode without a protective treatment or coating.

Question 32

Brass

Answer 32

- Brass is a yellow alloy of copper and zinc. It is used for locks, hinges, gears, bearings, zippers, hose couplings and electrical plugs or sockets.

Question 33

Advantages of brass

Answer 33

- brass is easy to work with, making it ideal for intricate designs and components - Also brass naturally forms a protective oxide layer that prevents further corrosion, making it suitable for outside.

Question 34

Disadvantages of brass

Answer 34

while brass is malleable it can be relatively soft compared to other metals.