Unit 3.1: Material Types and Properties

1. Unit 3.1: Material Types and Properties

2. SCO • Following completion of this lesson, students will be able to: • 3.1.1 Identify the common materials available for fabrication [1.403] • 3.1.2 Define the key physical/mechanical properties of materials [1.403] • 3.1.3 Explain the relationship between material properties and product application [1.403]

3. Metal Heads

4. Metals • Let’s look at some characteristics of metals: http://metalwebnews.com/machine-tools/ch2.pdf

5. Mild Steel • Mild steel is the most common form of steel as its price is relatively low while it provides material properties that are acceptable for many applications. • It becomes malleable when heated, and so can be forged. • It is also often used where large amounts of steel need to be formed, for example as structural steel.

6. Mild Steel

7. Stainless Steel • Stainless steel does not stain, corrode, or rust as easily as ordinary steel (it stains less, but it is not stain-proof).

8. Stainless Steel • To be used in cookware, cutlery, hardware, surgical instruments, major appliances, industrial equipment, and as an automotive and aerospace structural alloy and construction material in large buildings. Storage tanks and tankers used to transport orange juice and other food are often made of stainless steel, due to its corrosion resistance and antibacterial properties. This also influences its use in commercial kitchens and food processing plants, as it can be steam cleaned, sterilized, and does not need painting or application of other surface finishes.

9. Aluminum

10. Copper

11. The decision of what metal to use is based on availability, cost, available production methods, product application, and disposal. • It is important to be familiar with the physical and mechanical properties of metals when selecting for a particular design application.

12. Metal Info • http://www.matweb.com/search/MaterialGroupSearch.aspx

13. Assignment • Materials Assignment From page 105.