Alloys

Question 1

What is an alloy?

Answer 1

A mixture of 2+ metals to get the best properties of the base metals

Question 2

Duralumin; 
What type of alloy is it?
What's it made from?
What are it's properties?
Positives / negatives?

Answer 2

Non ferrous alloy
4 % copper 95 % aluminium
High strength
- Very expensive, not easily recyclable
\+ Can use less as it's very strong; lighter

Question 3

Bronze
What type of alloy is it?
What’s it made from?
What are it’s properties?

Answer 3

Non ferrous alloy
Copper and tin
Easy to work and cast, is self lubricating

Question 4

Stainless Steel
What type of alloy is it?
What’s it made from?
What are it’s properties?

Answer 4

Ferrous alloy
Steel 80% chrome and nickel 20%
Non corrosive, tough, wear resistant

Question 5

High speed steel;
What type of alloy is it?
What’s it made from?
What are it’s properties?

Answer 5

Ferrous alloy
Steel, Tungsten, Molybdenum, Chromium, Cobalt, Aluminium
Very hard, can be sharpened to a sharp edge, will cut when hot

Question 6

What are possible uses for ferrous alloys?

Answer 6

Cutlery, street furniture, cutting and press tools

Question 7

What are possible uses for non-ferrous alloys?

Answer 7

Ornaments, valves, boat fittings, sculpture, coins and jewellery

Question 8

What alloy could you find in a kitchen?

Answer 8

Stainless steel; cutlery and sink

Question 9

Why might you use stainless steel for a sink?

Answer 9

It doesn’t corrode in moisture and air, and is chemical resistant so can be cleaned with bleach
Stainless steel is malleable; can be press formed into the shape of the sink. It also has an ‘attractive’ silver appearance making it aesthetically pleasing.
Stainless steel is tough and wear resistant so will resist scratching and indentation.

Question 10

What alloy would you use for a structural component of an aircraft?

Answer 10

Duralumin

Question 11

Why is high speed steel used in cutting tools?

Answer 11

It’s hard, can be sharpened and will cut even when hot