You probably feel very confident in what you think a metal is. But do you know why it is that way and do you know where it is used in society today? Below are several links that will take you around the World Wide Web. The first three have great information about the basics that you definitely should look at, and then the rest are there just to give you some help. As you go through your search make sure that you take notes on your Why pick my Material Class? worksheet.
It is also important now that you've learned about metals, to look at how their processed again.
Aluminum-Some Aluminum alloys can be solution treated to increase their strength. Although aluminum alloy is approximately a third of the weight of steel, it is about three times the cost. Aluminum alloy is resistant to corrosion. Aluminum and it's alloys possess excellent thermal conductivity properties.
Copper is a metallic element that has unique properties which lead to
its use in a great many fields, these properties are: high electrical and thermal
conductivity and good corrosion resistance. Copper is easy to hot and cold work
- which means like most metals it is easy to make into different shapes. However,
machining copper can be difficult as it tends to adhere to the tool which results
in scoring. Copper is not normally welded, so joining can be a problem unless
Steels have been the most popular structural engineering metal for decades. The best part about steel is that it can be tailored for many different applications. Low carbon steels are usually referred to as mild steels. They are particularly useful for bending, forming and casehardening. They are useful for lightly stressed components and are available in several different forms including round, square, hexagonal and flat section. Ferritic stainless steels are mostly used for decorative trim. They are low in strength but have good ductility (easily bendable) and can be easily formed. These steels are mostly used for domestic and automotive trim, food processing and catering equipment, vehicle exhaust systems etc. Martensitic stainless steels are hardened and tempered to give tensile strengths in the range 550-1000 N/mm, which is quite high.. Typical applications include cutlery, surgical instruments, fasteners, valves, spindles and shafts. Martensitic steels are magnetic.