Metallurgy

Question 1

metal that contains iron and are usually magnetic

Answer 1

ferrous metals

Question 2

metal not containing iron

Answer 2

non ferrous

Question 3

appearance of hot rolled steel

Answer 3

black mill scale or heat scale surface

Question 4

appearance of cold rolled steel

Answer 4

shiny smooth surface

Question 5

the ability of a metal to resist penetration and plastic deformation

Answer 5

hardness

Question 6

the ability of a material to be stretched permanently without breaking

Answer 6

ductility

Question 7

the ability of a metal to withstand shock and impact without breaking or shattering

Answer 7

toughness

Question 8

the ability of a metal to withstand pull without breaking

Answer 8

tensile strength

Question 9

measures the ease with which you can cut and shape a metal

Answer 9

machinibility

Question 10

how can machinibility be improved

Answer 10

adding lead or annealing

Question 11

hot rolled steel is made larger or smaller to the nominal size

Answer 11

larger

Question 12

Shafting produced by this method is more expensive and can be used as a finished product without further machining

Answer 12

turned, ground and polished shafting

Question 13

12L14
first 2 digit means
L=
least 2 digits mean

Answer 13

first 2 digit is steel type
L signifies steel is leaded
last 2 digits is carbon content

Question 14

amount of carbon needed for steel to be hardened

Answer 14

.20

Question 15

the structure of soft steel is called

Answer 15

pearlite

Question 16

the structure of hardened steel is called

Answer 16

martensite

Question 17

steel structure that only exist at high tempuratures

Answer 17

austenite

Question 18

diamond penetrator is for what _____material

Answer 18

hardened material

Question 19

steel ball penetrator is for______ material

Answer 19

soft or non ferrous

Question 20

metal identification test best for testing carbon content and to distinguish between cast steel and cast iron

Answer 20

spark testing

Question 21

chip testing on soft material have chips that are

Answer 21

smooth and continuous

Question 22

process used to restore ductility, heat steel to a temperature below low critical temperature point then letting it air cool

Answer 22

process annealing

Question 23

process to eliminate strains and restore grain structure of steel. process involved heating steel above upper critical temperature and allowing it to air cool

Answer 23

normalizing

Question 24

process to make hardened work pieces machinable

Answer 24

full annealing

Question 25

annealed steel with less than .85% carbon needs to be heated

Answer 25

above upper critical temperature

Question 26

annealed steel with more than .85% carbons needs to be heated

Answer 26

above lower critical temperature

Question 27

hardening structure process

Answer 27

heating steel to austentite

quenching to become martensite

Question 28

carbon content needed to harden

Answer 28

.20%

Question 29

steel added to increase toughness

Answer 29

molybdrum

Question 30

high carbon steel is

Answer 30

over .60%

Question 31

low carbon steel is

Answer 31

.02-.30%

Question 32

copper and tin make

Answer 32

bronze

Question 33

copper and zinc make

Answer 33

brass

Question 34

austentitic stainless steel contains

Answer 34

chromium and nickel

Question 35

cast iron has a carbon content of

Answer 35

1.7%

Question 36

In addition to the mill test report what else do steel mills usually attached to the straps that holds the bundles of bar stock together

Answer 36

Metal specification tags

Question 37

What is the most precise method for the identification of a metal that has been shipped from a steel mill?

Answer 37

mill test report

Question 38

Ferrite is?

Answer 38

pure iron

Question 39

What is cementite type?

Answer 39

Is a carbide compound form from iron and carbon

Question 40

What are the two types of high speed steel?

Answer 40

• tungsten (Type-T)

* molybdenum (Type-M)