1. Classification of Metals
Metals can be classified as ferrous or non ferrous metals.
Ferrous Metals - Contain Iron.
Steel is a ferrous metal because it contains iron.
A quick way to tell if a metal contains iron is if magnetic.
Nonferrous Metals - Do not contain iron.
Nonferrous metals - aluminum, copper, lead, tin, zinc.
Nonferrous metals are not magnetic.

2. Classification of Metals
Metals can also be classified as pure metals or alloys.
Pure metals are made up of only one element.
Alloys are 2 or more pure metals mixed together.
Alloys are named after their base metals. An alloy that is made mostly out of steel, is called a steel alloy.

3. Properties of Metals Chemical Properties Physical Properties
Mechanical Properties

4. Chemical Properties
Properties that have to do with chemical composition of metals.
Corrosion resistance is an example of a chemical property.

5. Physical Properties
Characteristics of metals when they are not being acted on by outside forces
Color
Density
Weight

6. Mechanical Properties
Hardness - resistance to denting or scratching.
Hardenability - the ability of a metal to be hardened.

7. Mechanical Properties
Ductility - property of metal that allows it to be permanently deformed by hammering, rolling, or drawing without breaking.
Malleability - how easily metal can change shape when mechanically worked.
Most malleble metals are ductile.

8. Mechanical Properties
Toughness - ability to withstand sudden shock without breaking
Machinability - how easily a metal may be machined
Fusibility - how easily a liquid metal will join with another liquid metal.

9. Mechanical Properties
Tensile strength - resistance of being pulled apart
Compressive strength - resistance of being squeezed together
Torsion strength - resistance to twisting forces

10. Mechanical Properties

11. Mechanical Properties
Brittleness - property that causes metal to break or crack easily
Elasticity - ability of material to return to its original size and shape