3.2 Iron and Steels

Question 1

What do many of the ores used to produce iron contain?

Answer 1

Iron oxide

Question 2

How is iron oxide reduced?

Answer 2

At high temperatures in a blast furnace using carbon

Question 3

What does the iron produced from iron oxide contain?

Answer 3

96% iron

Question 4

What do the impurities of iron make it?

Answer 4

Hard and brittle so it only has few uses as cast iron

Question 5

What does removing all the carbon and other impurities do?

Answer 5

Makes the iron too soft for many uses

Question 6

What is most iron used to make?

Answer 6

Steel

Question 7

What is steel and why?

Answer 7

An alloy of iron because it is a mixture of iron with carbon and other elements

Question 8

How can alloys be made?

Answer 8

So they have properties for specific uses

Question 9

Low carbon steels is…?

Answer 9

Easily shaped

Question 10

High carbon steels are…?

Answer 10

Hard

Question 11

What do stainless steels contain large quantities of?

Answer 11

Other metals

Question 12

What do stainless steels resist?

Answer 12

Corrosion