What is spark testing of steel? Answer on your white board...

Pair/Share  With a partner, list on your whiteboard as many products as you can that contain aluminum.

Aluminum  Aluminum can no longer be considered just a single metal. When first produced, aluminum is 99.5 to pure.

 How pure is aluminum when first produced?

Aluminum  By itself, aluminum is somewhat soft and not very strong.  How could we increase aluminum’s strength?

Aluminum  Strength can be greatly increased by adding small amounts of alloying elements, or by heat treating or cold working the metal.

 Aluminum’s strength can be greatly increased by...

Aluminum Alloys  Aluminum alloys are lighter than most other metals  They do not rust or corrode under normal conditions  Can be shaped and formed easily  Usually alloys are clad on the outside with pure aluminum to resist corrosion

 Name two advantages of aluminum alloys.  Two advantages of aluminum alloys are......

 Aluminum-lithium alloys such as Alithalite can be used to reduce the weight of commercial aircraft by several tons