SC13d Alloys and their Uses

Question 1

why make alloy metals?

Answer 1

alloys are stronger than pure metals

Question 2

why are alloys stronger than pure metals?

Answer 2

in pure metals all the atoms are the same size and arranged regularly in layers allowing them to easily move over each other
in alloys the different elements can be different sizes which distorts the regular structure making it more difficult for the layers to slide over each other

Question 3

how is stainless steel better? 2

Answer 3

~resists rusting unlike other alloy steels and irons
~contains chromium which reacts with the air to form a thin layer of chromium oxide protecting the metal underneath

Question 4

what are tool steals used in?

Answer 4

drill bits

Question 5

why can stronger steels be negative and what are these used for?

Answer 5

harder to shape but can be used to make car parts

Question 6

mild alloy steels facts?

Answer 6

~less carbon than high strength steel
~contains manganese to make it stronger but still malleable
~often used as building materials and for car body panels

Question 7

aluminium uses and why?

Answer 7

overhead electrical cables as it is strong, cheaper, less dense and resists corrosion

Question 8

what alloy is brass?

Answer 8

copper and zinc

Question 9

use of brass? and why?

Answer 9

pins in electrical plugs because brass is strong

Question 10

what alloy is magnalium?

Answer 10

95% aluminium and 5% magnesium

Question 11

uses of magnalium? and why?

Answer 11

aircraft parts and scientific instruments because it is strong but lightweight and more resistant to corrosion