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

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

3. Aluminum  Aluminum can no longer be considered just a single metal. When first produced, aluminum is 99.5 to 99.76 pure.

4.  How pure is aluminum when first produced?

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

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

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

8. 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

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

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