Chapter 1

Question 1

basic composition of an alloy?

Answer 1

base metal and metal/non-metal (or both)

Question 2

why is alloy preferred over steel?

Answer 2

alloys are harder and stronger

Question 3

example of how alloy is preferred over pure metal?

Answer 3

aluminium alloy is used for the skin of an aircraft body instead of pure aluminium

Question 4

carbon content of alloy steel?

Answer 4

0.05 % to less than 2%

Question 5

stainless steel content?

Answer 5

iron and proper proportion of carbon, chromium, and nickel

Question 6

advantages of stainless steel

Answer 6

stainless steel is mechanically hard, strong, and does not rust

Question 7

what happens if the carbon content of an alloy is increased?

Answer 7

the alloy becomes harder, stronger, and less ductile

Question 8

percentage of carbon content in low-carbon steel?

Answer 8

0.10% - 0.25%

Question 9

percentage of carbon content in medium-carbon steel?

Answer 9

0.25% - 0.45%

Question 10

percentage of carbon content in high-carbon steel?

Answer 10

0.45% - 0.95%

Question 11

percentage of carbon content in very-high-carbon steel?

Answer 11

0.95% - 2.1%

Question 12

general percentage of carbon content in plain-carbon steel?

Answer 12

0.10% - 0.95%

Question 13

percentage carbon in cast iron?

Answer 13

more than 2.1%

Question 14

percentage of added elements in low-alloy steel?

Answer 14

less than 5%

Question 15

advantages of using carbon as an alloying element?

Answer 15

makes the alloy harder and stronger

Question 16

disadvantages of using carbon as an alloying element?

Answer 16

makes the alloy more brittle

Question 17

advantages of using manganese (0.5% - 2%) as an alloying element?

Answer 17

makes the alloy harder, stronger, and more responsive to heat treatment

Question 18

disadvantages of using manganese (0.5% - 2%) as an alloying element?

Answer 18

causes embrittlement to occur when too much manganese and too much carbon are added at the same time