Alloys As Useful Materials

Question 1

What are alloys ?

Answer 1

A Mixture of different metals

Question 2

Why are metals alloyed ?

Answer 2

• harder because the metal layers cannot slide as easily due to them being disrupted
• less expensive
• aesthetic reasons

Question 3

What are the two alloys of copper ?

Answer 3

Brass
Bronze

Question 4

What element are in brass ?

Answer 4

Copper and zinc

Question 5

What elements are in Bronze ?

Answer 5

Copper and tin

Question 6

What is bronze used for and why ?

Answer 6

Extremely hard and tends to not corrode it is used for statues

Question 7

What is brass used for and why ?

Answer 7

Can be formed into different shapes and it usually used for musical instruments and handles

Question 8

What is gold often used for ?

Answer 8

Jewellery however pure gold is too soft

Question 9

What is gold usually alloyed with and why ?

Answer 9

Silver, copper and zinc to make it harder

Question 10

What is the carat number of pure gold ?

Answer 10

24

Question 11

What is the carat numbers of 75% gold ?

Answer 11

18

Question 12

What are steels ?

Answer 12

Alloys of iron contains specific amounts of carbon in it

Question 13

What are the differences between high carbon steel and low carbon steel ?

Answer 13

High carbon steel: strong and brittle
Low carbon steel: soft and easily melted

Question 14

What is high carbon steel used for ?

Answer 14

Making tools such as chisels

Question 15

What is low carbon steel usually used for ?

Answer 15

Car bodies

Question 16

What is the issue with steel ?

Answer 16

It’s an alloy of iron and therefore can rust

Question 17

Why does stainless steel not rust ?

Answer 17

Contains chromium and nickel as-well meaning it is hard and resistant to corrosion

Question 18

What are alloys of aluminum used for and why ?

Answer 18

Aeroplane bodies
- low density and do not corrode due to an oxide coating

Question 19

How do we remember brass and bronze ?

Answer 19

Braz
And
Brot