Materials - Metals

Question 1

What is the difference between ferrous and non-ferrous metals?

Answer 1

Ferrous metals contain iron and non-ferrous metals don’t contain iron

Question 2

What are the ferrous metals?

Answer 2

-Cast iron
-Mid/low carbon steel
-Tool/high carbon steel
-Stainless steel (Alloy) contains chromium and nickel
[Increases strength, toughness, ductility and makes it stainless]

Question 3

What are the non-ferrous metals?

Answer 3

-Aluminium
-Zinc
-Copper
-Tin
-Brass (Alloy) contains copper and zinc
[Increases malleability, ductility electrical conductivity and it is resistant to corrosion]

Question 4

Why are steels all ferrous?

Answer 4

-Iron is a main component of steel

Question 5

How do the different components affect the properties of steel?

Answer 5

• More iron = more soft (malleable)

- More carbon = more hard

Question 6

What are alloys?

Answer 6

-Mixtures of two or more metals made to improve the properties of existing metals

Question 7

Why do ferrous metals often need protection?

Answer 7

-They can oxidise (rust)

Question 8

What metal would be used for the main body of a kettle and why?

Answer 8

• Stainless steel (Brushed and lacquered)
• Corrosion resistant, to resist scaling inside the kettle
• Stainless steel is durable and hard to resist knocks and dents
• Can withstand high temperatures
• Easy to clean, so the kettle is low maintenance