57 - Alloys Flashcards
1
Q
Why are alloys harder than pure metals?
A
Different sized atoms cause distorted layers which don’t slide
2
Q
Why is stainless steel used?
A
Added chromium or nickel makes it corrosion-resistant
3
Q
What is a property of low carbon steel and what is it useful for?
A
Easily shaped, ideal for car bodies
4
Q
What is a property of high carbon steel and what is it useful for?
A
Very hard and inflexible, ideal for blades and bridges
5
Q
Which two metals make up bronze?
A
Copper and tin
6
Q
Why isn’t pure gold used for jewellery?
A
It is too soft
7
Q
Why aren’t pure metals hard enough?
A
The atoms of a pure metal are arranged and can slide over one another
