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metals overveiw - Coggle Diagram
metals overveiw
ferrous
does contain iron in it
properties
strong
rigid
hard
magnetic
will corrode unless protected
steel
made by adding carbon to iron
different types of steel
cast iron
3.5% or above carbon content
brittle
used in saucepans
high carbon steel
used in cutting blade
0.6%-1.7% carbon content
mild steel
less than 0.3% carbon content
medium carbon steel
0.3%-0.6% carbon content
iron
ductile and soft
not very commercial
source of metals
gold is the only metal found in an useable form
most metals are found in ores and then have to be processed to use
25% of the earths crust is made out of metals
aliminum is the most common metal
iron is the second most common metal
non-ferrous
does not contain iron init
aluminium
most abundant
to process it it use a lot of energy
it is opened mined which is very destructive and bad
make tin cans
alloy
benefits of alloys
Changes the melting point
Changes the colour
Increases strength, hardness and ductility
Enhances resistance to corrosion and oxidation
Changes electrical/thermal properties
Improves flow properties (better for casting)
contains more than one base material