alloys Flashcards
what 2 elements are steel made out of?
iron and carbon
what 2 metals are duralumin made of?
aluminium and copper
what 2 metals are solder made out of?
tin and copper or copper and lead
what two metals are brass made of ?
copper and zinc
what two metals are bronze made of?
copper and tin
What is an alloy?
An alloy is a mixture of two or more elements, at least one of which is a metal.
What is duralumin?
An alloy of aluminium and copper that is lightweight yet much stronger than aluminium alone.
What are the typical uses of steel?
- Buildings
- Bridges
- Cars
What is the melting point of tin and copper used in solder?
- Tin: 232°C
- Copper: 1085°C
What happens to solder when it is heated?
Solder begins to melt at about 227°C.
How does solder work in joining electrical components?
Hot solder flows into the gap and solidifies quickly, allowing an electric current to pass.
What properties make brass useful for making electrical plugs?
- Almost as good as copper at conducting electricity
- Stronger
- Resists corrosion
What is the main difference between brass and bronze?
Brass is an alloy of copper and zinc, while bronze is an alloy of copper and tin.
What makes bronze useful for making cymbals and bells?
Bronze resists corrosion and is stronger and harder than copper.
Describe how the properties of brass and bronze make them useful for making coins.
Both are resistant to corrosion and have desirable physical properties for durability.
What is the tensile strength of carbon steel with 0.20% carbon?
117 (relative tensile strength)
What is the ductility of carbon steel with 0.10% carbon?
1.00 (relative ductility)
Which steel would be best for making car body panels?
Steel with a balance of strength and ductility, likely the one with 0.20% carbon.
True or False: Alloys often have properties that are the same as the metals they contain.
False
Fill in the blank: Brass is an alloy of copper and _______.
zinc
Fill in the blank: Bronze is an alloy of copper and _______.
tin
what is steel used for
buildings bridges and cars
what is duralumin used for
aircraft parts
what is solder used for
joining electrical components and copper pipes
what is brass used for
musical instruments, coins and the pins for electrical plugs
what is bronze used for
bells and propellers for ships
