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CWB1 > Metallurgy > Flashcards

Metallurgy Flashcards

1
Q

Define ductility:

A

The ability to deform or stretch without fracture under tension

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2
Q

Define malleability:

A

The ability to deform under compressive forces

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3
Q

What is the rate at which heat is conducted through a material?

A

Thermal conductivity

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4
Q

High alloy steels have alloying elements of _________ or higher?

A

10%

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5
Q

Which type of stainless steel contains the lowest level of chromium?

A

Martensitic stainless steel

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6
Q

Which lattice structure shape does iron have at room temperature?

A

BCC

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7
Q

Which lattice structure shape does aluminum have?

A

FCC

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8
Q

When performing heat treat, which provides a finer grain structure?

A

Normalizing

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9
Q

When performing heat treat, which process does not refine the grain structure?
A) annealing
B) normalizing
C) stress relieving
D) quenching and tempering

A

C) stress relieving

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10
Q

Quenching is used to achieve a higher toughness.
True or false

A

Falsd

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11
Q

What is the difference between annealing and normalizing?

A

Normalized material is air cooled

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12
Q

What is stress relieving?

A

Equalization and stabilization of any residual stresses without any refinement of the grain structure.

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13
Q

How many classifications of steel types are covered by CSA G40.21?

A

Seven

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14
Q

Which organization is a professional society of engineers in the field of ground, air and space transportation?

A

SAE

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15
Q

Which organization is an association of steel producers that issues steel specifications and co operates with SAE in using the same numbering system?

A

AISI

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16
Q

Which organization is a professional society of mechanical engineers that issues codes for boilers and pressure vessels?

A

ASME

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17
Q

CSA standards cover materials used for pressure equipment.
True or False

A

False

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18
Q

Under the SAE and AISI systems, each steel is given a four- digit numerical index that relates to its composition. Which digit indicates the sub-class (which is often the percentage of major alloying element)?

A

The second digit

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19
Q

What are the challenges when trying to identify materials using a colour coding method?

A

There can be loss of the marking from damage and marking systems are not standardized.

20
Q

An MTR includes material colour coding information.
True or false

A

False

21
Q

What indicates that a steel has been hot rolled?

A

Black mill scale

22
Q

Which two metals have a white fracture surface?

A

Aluminum and lead

23
Q

What cast irons have a melting point of 1260•C?

A

Grey, white, malleable

24
Q

What metal distorts when heat is applied?

A

Magnésium

25
Q

What metal has a light straw colour when oxidized?

A

Titanium

26
Q

Which metal is magnetic and has a 1500•C melting point?

A

Steel

27
Q

During a spark test, __________ produce orange lines, ending in pear shaped globules. There is very little branching and there are few carbon bursts.

A

High speed or cutting steels

28
Q

What type of test is important for helping to identify a metals susceptibility to hydrogen cracking?

A

A hardness test

29
Q

In the basic oxygen furnace, what does the term basic refer to?

A

The chemical nature of the refractory lining of the furnace

30
Q

Wire, certain grades of pipe, and some machining steels can be produced by the ___________ process.

A

Bessemer converter

31
Q

The highest quality of steel is produced through the use of a what?

A

Electric furnace

32
Q

What type of furnace is made of bricks and burns by heating gas?

A

Open hearth furnace

33
Q

What type of furnace blows oxygen into Liquid Metal?

A

Basic oxygen furnace

34
Q

What type of furnace produces the highest quality of steel?

A

Electric furnace

35
Q

What furnace has high production rates at lower costs?

A

Bessemer converter

36
Q

What type of steel ingot process offers an excellent rolled surface finish?

A

Rimmed steel

37
Q

Steels either a carbon content greater than _____% will originate from fully killed steels?

A

0.3%

38
Q

What type of steel is similar to rimmed steel with less segregation of impurities?

A

Capped steel

39
Q

Which type of steel may be susceptible to lamination issues after rolling?

A

Killed steel

40
Q

What type of finished product is a billet considered to be?

A

Semi finished

41
Q

Pre-coated steels cannot be coated with paint.
True or false

A

False

42
Q

Cold-rolled material is typically worked below the material’s __________ temperature range.

A

Recrystallized

43
Q

What type of pipe is formed in ‘U’ shaped presses?

A

Large diameter

44
Q

What type of pipe is formed using rollers and a piercing mandrel?

A

Seamless pipe

45
Q

What type of pipe is welded with the ERW process?

A

Seamed pipe

46
Q

What type of casting process requires a high volume of production to make the process economical?

A

Die casting

47
Q

Which casting process offers a smooth surface finish?

A

Die casting

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