Chemistry C1 3.2 Iron and steels.

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How is iron oxide used to make iron?
Iron oxide is reduced in a blast furnace to make iron.
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What is the problem with iron from a blast furnace?
It is too brittle for many uses.
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What happens to most iron?
It is converted into alloys called steels.
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What do steels contain?
Carefully controlled quantities of carbon and other elements.
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What do many of the ores used to produce iron contain?
Iron(III) oxide.
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How is iron (III) oxide reduced?
In high temperatures in a blast furnace using carbon.
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How much iron does the iron produced from reducing iron (III) oxide in a blast furnace contain?
About 96% iron.
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What do the impurities in the iron produced cause?
It to be hard and brittle and so it has only a few uses as cast iron.
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What happens if all the carbon and other impurities are removed to make pure iron?
It is too soft for many uses.
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What is most iron used to make?
Steels.
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What are steels?
Steels are alloys of iron because they are mixtures of iron with carbon and other elements.
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Why are alloys useful?
Alloys can be made so that they have properties for specific uses.
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Why are the amounts of carbon and other elements carefully adjusted when making steels?
To produce steel with properties required for specific uses. Low-carbon steels are easily shaped and high-carbon steels are hard.
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What do some steels, such as stainless steels, contain?
Larger quantities of other metals.
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What advantage to some steels which contain larger quantities of other metals, such as stainless steels, have?
They resist corrosion.
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Why does iron from the blast furnace have only a few uses?
It is brittle.
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Why are steels more useful than pure iron?
They are harder, can be made with specific properties, can be made to resist corrosion.
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Other cards in this set

Card 2

Front

What is the problem with iron from a blast furnace?

Back

It is too brittle for many uses.

Card 3

Front

What happens to most iron?

Back

Preview of the front of card 3

Card 4

Front

What do steels contain?

Back

Preview of the front of card 4

Card 5

Front

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

Back

Preview of the front of card 5
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