If they are sometimes confused, iron, cast iron and steel are indeed three distinct materials. The first is actually part of the composition of the other two.
Theis a Fe symbol. This is a stream, white, hard and ductile.
Iron, an abundant chemical element
Theis a large part of the and, in fact, the of our planet. In the , it is mainly found in the form of oxides such as hematite (Fe 2 O 3 ) or (Fe 3 O 4 ).
Men have learned to work around the XII th century BC. BC, precisely marking the beginning of.
Cast iron, an iron alloy rich in carbon
In industry, iron is rarely used in its pure state. It is used in the composition of several alloys, one of the main ones being.
Thisis composed of iron and up to 2% to 6.67%. When, in , carbon is in the form of lamellae , we speak of gray cast iron.
Contrary to popular belief, cast iron is no heavier than iron.
It has abetween 6,800 and 7,400 per cubic meter while iron is located at 7,860 kilograms per cubic meter. Cast iron is no heavier than either – of which it can be a precursor – with a density very close to that of iron.
Steel, an iron-carbon alloy;
Steel is the other main alloy of iron. It also incorporates a share of carbon: between 0.02% and 2% of the total mass of the piece of.
Once quenched, steel becomes even harder than iron. It takes most of its properties from its carbon content.
When this increases, theof the alloy improves and its elongation at break decreases.
The addition of other elements, such asor , also makes it possible to modify the of steel.
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