Alloys

Question 1

what % of iron is iron straight from the blast furnace?

Answer 1

96%, other 4% is impurities

Question 2

what is impure iron used as?

Answer 2

cast iron, ornamental railings, too brittle for most other things

Question 3

what is the arrangement of pure iron?

Answer 3

regular, layers can slide over each other,makes irons soft and easily shaped

Question 4

what is pure iron not suitable for most things?

Answer 4

it is too bendy

Question 5

what is most pure iron turned into?

Answer 5

alloys called steels

Question 6

how are steels formed?

Answer 6

by adding small amounts of carbon (sometimes other metals) to the iron

Question 7

properties and uses of low carbon steel

Answer 7

easily shaped, car bodies

Question 8

properties and uses of high carbon steel

Answer 8

very hard and inflexible, blades for cutting tools and bridges

Question 9

properties and uses of stainless steel

Answer 9

corrosion-resistant, cutlery and containers for corrosive substances

Question 10

why are alloys harder than pure metals?

Answer 10

when an element such as carbon is added to pure iron, the smaller carbon atom with upset the layers of pure iron atoms, making it more difficult for them to slide over each other, so they are harder