Metals

Question 1

What are the advantages of Mild Steel?

Answer 1

-high impact strength
-good ductility/weldability
-magnetic
-good malleability
-lighter than high carbon steel
-affordable

Question 2

What are the disadvantages of Mild Steel?

Answer 2

-not very corrosion resistant
-doesn’t have high tensile strength
-cannot be heat treated
-heavy

Question 3

What are the uses of Mild Steel?

Answer 3

-signs
-structural steel
-furniture
-nails
-decorations

Question 4

What are the advantages of High Carbon Steel?

Answer 4

• Highest hardness and toughness of the carbon steels
• Lowest ductility
• Very wear resistant - almost always hardened and tempered
• 0.61% to 1.5% carbon - extremely hard and strong but more brittle than the steels comprised of less carbon.

Question 5

What are the disadvantages of high carbon steel?

Answer 5

• Because its strong, its difficult to work with - cant be easily bent and moulded into different shapes
• More susceptible to rust and corrosion
• More expensive to produce

Question 6

What are the uses of High Carbon Steel?

Answer 6

Hardness makes it preferred for metal and woodcutting tools such as axes, knives, springs and saws

Question 7

What are the advantages of Copper?

Answer 7

• Economical
• Lightweight
• Formable
• Easy to join
• Safe
• Dependable
• Long-lasting
• 100% recyclable
• Ductile
• Conducts heat and electric well

Question 8

What are the uses of Copper?

Answer 8

• electrical equipment
• wires
• motors

Question 9

What are the disadvantages of Copper?

Answer 9

• Poor tensile strength
• Corrodes
• Relatively expensive
• Not very hard

Question 10

What are the advantages of Duralumin?

Answer 10

• Strong
• Lightweight
• Hard
• Conductive
• Malleable

Question 11

What are the disadvantages of Duralumin?

Answer 11

• Not corrosive resistant

Question 12

What are the uses of Duralumin?

Answer 12

Planes

Question 13

What are the advantages of Stainless Steel?

Answer 13

• Durable
• Easy to maintain
• Tends to be hygienic
• Versatile and customisable
• Good strength to weight ratio
• High resistance to corrosion
• Strong
• High melting point
• Attractive
• Range of tensile strength depending on alloy
• made of iron, carbon, chromium, steel, nickel

Question 14

What are the disadvantages of Stainless Steel?

Answer 14

• Expensive
• Require frequent cleaning
• Soft (scratches, dents)
• difficult to weld

Question 15

What are the uses of Stainless Steel?

Answer 15

• utensils
• dishwashers
• fridges

Question 16

What are the advantages of Brass?

Answer 16

• High corrosion resistance
• Ductile and malleable
• Excellent machining qualities - they are easily worked.
• Available in a wide variety of forms, which may reduce stage sin manufacture.
• Considered an Attractive metal
• Good flow characteristics - it casts well and take detail.

Question 17

What are the disadvantages of Brass?

Answer 17

• Not magnetic.
• Reasonable electrical and thermal conductor.

Question 18

What are the uses of Brass?

Answer 18

• Locks
• Hinges
• Pipes

Question 19

What are the advantages of Pewter?

Answer 19

• Malleable
• Easily fusible with other metals
• Not corrosive
• Water tight
• Low melting point 250oC
• Highly recycled
• Cost effective

Question 20

What are the disadvantages of Pewter?

Answer 20

• Loses its shine/polish over time
• Very soft so can snap/break if too much force is applied
• Takes a long time to polish
• Excess heat can bend the casting
• Cannot take on precise small castings
• Can dent easily

Question 21

What are the uses of Pewter?

Answer 21

• dishes
• church vessels
• decorative items

Question 22

What are the advantages of silver?

Answer 22

• Malleable
• Ductile
• very conductive
• highly reflective
• very dense
• anti-bacterial

Question 23

What are the disadvantages of Silver?

Answer 23

• Rather soft (scratches easily)
• not corrosive resistant
• very expensive

Question 24

What are the uses of Silver?

Answer 24

• electrical components
• silver-wear
• dental alloys