Metals and alloys Flashcards
Two groups of metals
Ferrous
Non-ferrous
Define ferrous metal
Metals that contain iron
Define non-ferrous metal
Metals that do not contain iron
What is the primary source of all metals
Ore
Define alloy
A material produced by combining two or more elements together to produce a new materials with refined properties
Name 4 pure metals
Copper
Gold
SIlver
Iron
Name 3 ways of stopping mild steel rusting
Paint it
Coat it in zinc (Galvanizing)
Plate it in silver
What tyw metallic elements make steel
Iron
Carbon
State 3 properties of copper
Ductile
Relatively malleable
Good conductor of heat and electricity
What metal is an alloy of copper and tin
Bronze
What metal is an alloy of copper and zinc
Brass
What is Corten steel
A metal which forms a rust.
It maintains a stable rust to stay corrosion resistant
Name 3 ways of joining metal using heat
Welding
Soldering
Brasing
What properties do most ferrous metals have
Most ferrous metals are magnetic
What does the carbon inside the ferrous metal provide
The carbon content means that most ferrous metals are prone to corrosion in the form of rust when exposed to moisture of oxygen
Properties such as hardness and malleability are directly related to their carbon content
The more carbon found in the metal, the harder and less malleable the metal becomes
Types of ferrous metals
Cast iron
Low carbon steel (mild steel)
High carbon steel (tool steel)
State the composition of cast iron
Iron and 3.5% carbon
State the properties of cast iron
Hard surface but has a brittle soft core
Strong compressive strength
Cheap
Common uses of cast iron
Vices
Car break discs
Cylinder blocks
Manhole covers
Composition of mild steel
Iron and 0.15 -0.35% carbon
Properties of mild steel
Good tensile strength
Tough
Malleable
Poor resistance to corrosion
Common uses
Car bodies
Nuts
Bolts
Screws
RSJ’s and girders
Composition of tool steel
Iron and 0.70 - 1.4% carbon
Properties of tool steel
Hard but also brittle
Less tough, malleable or ductile than medium carbon steel
