Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

3rd Year Welding > 3rd Metalurgy > Flashcards

3rd Metalurgy Flashcards

1
Q

What type of stainless steel contains the most nickle

A

Austenitic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Which 2 alloying elements in martensitic stainless steels are responsible for its high hardenability

A

Carbon and chromium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Ansi 200 and 300 series stainless steel are

A

Austenitic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What series of stainless steels can be either ferritic or martensitic

A

400 series

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Stainless smaw rod with suffix 15 polarity

A

Used with dcrp only

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Coating on e308-16

A

Titanic for use with ac

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

How should you store stainless rods when removed from thier sealed packaging

A

In a heated rod oven

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

For stainless What should you do to ensure a high quality weld joint

A

Remove moisture by heating with dry air

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

2×× stainless steel :
Type,
Alloy elements
Hardenable

A

Austenitic
Chromium, nickle, manganese
Non hardenable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

3xx stainless
Type
Alloys
Hardenable

A

Austenitic
Chromium, nickle
Non hardenable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

4×× stainless steel
Type
Alloys
Hardenable

A

Ferritic or martensitic
Chromium chromium
Non hardenable hardenable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

5xx stainless steel
Type
Alloys
Hardenable

A

Martensitic
Chromium
Air hardenable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

E Ni Cu -7 is for

A

E :electrode
Ni: nickle
Cu: other chemicals
-7 : separate one composition from another within a group

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

2 advantages of nickle and its alloys

A

1) excellent corrosion resistance especially at high temps
2) increase in equipment service life

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

What mechanical effects does alloying nickle, upto 4 %, have on steel

A

Increase strength by 6000psi per percent and low temp impact properties

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

5 types of metals used for cryogenic applications

A
  • copper
  • aluminum
  • monel
  • 300 series stainless
  • 9% nickle steel
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Smaw arc length on most nickle alloys

A

Short

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

What thickness range is most often welded with clad alloy filler metal

A

1/2 “ or less

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Is the same as grain growth

A

Crystal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

These are ___ ____ and are a source of

A

-Grain boundries
-weakness

21
Q

A dendrite is

A

A tree like branching structure made frome molten metals solidifying

22
Q

Def alloy:

A

An engineering material with metallic properties containing 2 or more elements, at least 1 must be a metal

23
Q

This is a

A

Body centered cubic structure.
BCC, 8 atoms on tho outside and 1 in the center

24
Q

This is a

A

Face centered cubic structure
FCC, no atoms in dead center, only center of all 6 sides

25
This is a
Body centered tetragonal BCT Very hard/brittle. From cooling to fast
26
Allotrophy def:
The ability of a material to exist in 2 or more atomic forms without any change in atomic composition Ie iron BCC to FCC at high temp and back to BCC when cooled
27
Ferrite is:
Softest structure of iron
28
Cementite def:
A hard and brittle compound of iron and carbon, a component of pearlite
29
Curie point def:
When it becomes non magnetic, about 1415 degrees f
30
Difference between annealing and normalizing?
Annealing is cooling in a furnace Normalizing is in still air with a finer grain structure
31
Steel is made of
- iron - carbon (Also - manganese - silicon)
32
Arc strikes can cause
Cracking
33
The higher the carbon content the ____ to weld
Harder
34
Max carbon content for pipe/pressure vessels
.35
35
Def crystal
The symmetrical arrangement of atoms in s solid. With metals its the grain structure
36
An element def:
A pure substance that can't break down into other substances
37
Lower critical temp of steel
1333
38
Upper critical range? Why a range?
1333 - 2000 - because of the percentage of carbon
39
Martensite is formed when
Steel heats above upper critical then is quenched
40
Why do you preheat some metals
It prevents rapid cooling, specially on thick sections
41
Which holds more carbon FCC or BCC
FCC
42
How much carbon can a BCC lattice contain
. 025 %
43
Metallurgy :Why is a multiples weld better
Each pass refines the grains to be finer
44
Perlite consists of alternating layers of
Ferrite and cementite
45
What grain structure does low carbon steel have if it cools slowly
Ferrite and pearlite
46
Standard charpy impact sample size
10 x10 x55 mm
47
Impact tester force
300 ft/lbs (400 joules)
48
100 % brittle appearance
Light crystalline appearance
49
100 % ductile appearance
Darker , fibrous

3rd Year Welding (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions