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First Year > Metallurgy > Flashcards

Metallurgy Flashcards

1
Q

Metals have iron as the major ingredients and are usually magnetic

A

Ferrous metals

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2
Q

Metals that do not have iron in large enough amount to have any major influence on the properties of metals

A

Non-ferrous metals

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3
Q

What is the most practical method of identifying a metal?

A

by visual appearance, texture and color

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4
Q

What are the most important properties to consider for metals?

A
  • hardness
  • ductility
  • toughness
  • tensile strength
  • machinability
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5
Q

The ability of a metal to resist penetration and plastic deformation?

A

hardness

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6
Q

The ability of a metal to deformed permanently without breaking?

A

ductility

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7
Q

The ability of a metal to withstand shock and impact without breaking or shattering is?

A

toughness

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8
Q

The ability of a metal to withstand pull without breaking is?

A

tensile strength

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9
Q

The ease at which you can cut and shape a metal is known as?

A

machinability

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10
Q

The most common metal material is?

A

carbon steel

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11
Q

What is the most common material used in the industry?

A

aluminium

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12
Q

If a piece of a metal has a smooth outer surface, what might you conclude about the object?

A

it has been formed

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13
Q

If an object is irregularly shaped, what might you conclude the object?

A

it is a casting

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14
Q

What are the different ways of identifying metals?

A
  • color
  • visual appearance
  • weight
  • texture
  • shape
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15
Q

Given two identical pieces of metals, zinc dye cast and aluminium, what would be the simplest way to identify them?

A

by their weight

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16
Q

How can you distinguish between hot rolled and cold rolled steel?

A

*Hot rolled steel has a black mill scale or a heat scale surface

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17
Q

List all carbon steel sub-groups

A
  • low carbon
  • medium carbon
  • high carbon
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18
Q

What are the two (2) main divisions of metals?

A
  • Ferrous Metals

* Non-Ferrous Metals

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19
Q

Low carbon steel has

A

.02 - .30 % carbon

20
Q

Medium carbon steel has

A

.30 - .60 % carbon

21
Q

High carbon steel has

A

anything over .60%

22
Q

What is considered to be cast iron?

A

Anything over 1.7%

23
Q

The three special types of allow steel are?

A
  • high strength low allow steel (HSLA)
  • quench and temper structural steel
  • maragine steel
24
Q

What are the two types of high speed steel?

A
  • tungsten (Type-T)

* molybdenum (Type-M)

25
Q

What are the three types of stainless steel?

A
  • austenitic stainless steel
  • ferritic stainless steel
  • martensitic stainless steel
26
Q

The two principal alloy for copper are?

A
  • brass

* bronze

27
Q

A mixture of copper and zinc makes

A

Brass

28
Q

A combination of copper and tin is?

A

Bronze

29
Q

The principal types of bronze are?

A
  • phosphor-bronze
  • silicon line bronze
  • aluminium line bronze
  • beryllium bronze
30
Q

The structure of soft steel is called?

A

Pearlite

31
Q

Ferrite is?

A

pure iron

32
Q

What is cementite type?

A

Is a carbide compound form from iron and carbon

33
Q

The precise amount of ferrite and cementite depends on?

A

the percentage of carbon in the steel

34
Q

The basic heat treating processes for steel are?

A
  • hardening
  • tempering
  • annealing
  • normalizing
35
Q

The proper hardening temperature is reached when the work piece is?

A

Cherry red color

36
Q

How is tempering done?

A

immediately after hardening or it will crack

37
Q

You can achieve a more control temper by?

A

heating the work piece in oil, sand, salt, or lead bath

38
Q

What are the sub-groups of which metals belong to?

A
  • carbon steel
  • alloy steel
  • tool steel or high speed steel
  • stainless steel
  • aluminium and its alloys
  • copper and its alloys
  • cast iron
39
Q

When the heat code identification number is cut from a piece of plate, what should you do?

A

Transfer the id number to the remaining plate

40
Q

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

A

study the mill test report

41
Q

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

A

Metal specification tags

42
Q

The lower critical temperature of steel is always at around?

A

1333°F or 723°C

43
Q

Which element found in some copper alloy is a significant health hazard?

A

Beryllium

44
Q

What are the two types of hardness testing?

A
  • rockwell hardness testing

* brinell hardness testing

45
Q

If you are told a work piece has a rockwell C-65, what would that mean

A

it has been hardened

46
Q

When distortion from heat treatment must be kept to a minimum, which type of steel should be use?

A

Air hardening steel

47
Q

Tubing is sized according to its

A

outside diameter

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