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201E Flashcards

carbon and alloy steels and alloy steel filler metals (52 cards)

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1
Q

what is the carbon content range of low range steel?

A. 0.05% to 0.30%
B.0.30% to 0.45%
C.0.45% to 0.75%
D. 0.75% to 1.50%

A

A. 0.05% to 0.30%

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2
Q

punches and dies are made from what class of carbon steel?

A. low
B. medium
C. high
D. very high

A

D. very high

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2
Q

axles and connecting rods are made from ________ carbon steel.

A

Medium

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2
Q

what is the carbon content range of high carbon steel.

A. 0.05% to 0.30%
B. 0.30% to 0.45%
C. 0.45% to 0.75%
D. 0.75% to 1.50%

A

C. 0.45% to 0.75%

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3
Q

what is the carbon content range of very high carbon steel?

A. 0.05% to 0.30%
B. 0.30% to 0.45%
C. 0.45% to 0.75%
D. 0.75% to 1.50%

A

D. 0.75% to 1.50%

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4
Q

Structural shapes are made from ___________ carbon steel.

A

low

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5
Q

what is the carbon content range of medium carbon steel?

A. 0.05% to 0.30%
B. 0.30% to 0.45%
C. 0.45% to 0.75%
D. 0.75% to 1.50%

A

B. 0.30% to 0.45%

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6
Q

in the SAE or AISI number 1025, the number 25 indicates the:

A. tensile strength of the material
B. percentage of alloy added
C. carbon content in hundredth of 1%
D. sulfer content of the steel

A

C. carbon content in hundredth of 1%

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7
Q

The SAE and ASIS uses the same numbering system of what type of steel products?

A automobile frames
B sheet steel
C structural steel plates shape
D steel bars

A

D steel bars

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8
Q

which governing body writes specification for structural steel shaped plate?

A ASTM
B ASME
C AWS
D ASIS

A

A ASTM

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9
Q

leaf springs used on automobiles are made from ________________ carbon steel.

A

high

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10
Q

what is indicated by the first digit in the SAE or AISI numbering system?

A tensile strength
B class off steel
C carbon content
D percentage of purity in the hundredths of 1%

A

B class off steel

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11
Q

which to orginizations work closely together in issuing steel specifications for the fabrication of boilers and pressure vessels?

A SAE and AISI
B ASTM and AISI
C ASTM and ASME
D ASTM and SAE

A

C ASTM and ASME

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12
Q

what is the principle hardening agent in steel?

A tungsten
B manganese
C boron
D carbon

A

D carbon

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13
Q

why is preheat necessary in the welding of most high carbon steels?

A. to speed up the cooling rate
B to slow down the cooling rate
C. to draw out impurities
D. allows the use of ac current

A

B to slow down the cooling rate

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13
Q

which class of steel is generally tough, ductile, easily formed and usually welded without preheat

A low carbon
B medium carbon
C high carbon
D very high carbon

A

A low carbon

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14
Q

which elements exist in small quantities in carbon steels and ae usually considered impurities?

A. iron, carbon, manganese
B. silicon, Sulphur, manganese
C. Phosphorus, silicon, manganese
D. Sulphur, phosphorus

A

D. Sulphur, phosphorus

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15
Q

which element in carbon steels, in percentages up to about 0.80%, is intended into combine with Sulphur to offset embrittlement and hot shortness?

A. phosphorus
B. silicon
C. manganese
D. carbon

A

C. manganese

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16
Q

in high percentages, this element is considered an impurity. in low percentages up to approximately 0.01%, it slightly improves the strength and corrosion resistance of low carbon steel.

A phosphorus
B Sulphur
C silicon
D manganese

A

A phosphorus

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16
Q

the content in carbon steel is usually kept below 0.05%, but a content of 0.1% to 0.15% can improve its machinability.

A. manganese
B. Sulphur
C. phosphorus
D. silicon

A

B. Sulphur

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17
Q

which element increases the strength and toughness of steel in low temperatures?

A. nickel
B. chromium
C. tungsten
D. molybdenum

17
Q

what is the purpose of having a chromium content of 10% to 30% in steel?

A. increase corrosion resistance
B. gives the steel a shiny finish
C. increase hardness at high temperatures
D. improve toughness at low temperatures

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A

A. increase corrosion resistance

18
Q

which element is used to decrease high temperature creep ( slow stretching of steel under stress at high temperatures)?

A. cobalt
B. manganese
C. molybdenum
D. silicon

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A

C. molybdenum

19
Q

what is the alloying element in carbon steel that tends to produce a fine grain structure during the heat- treating process?

A. tungsten
B. titanium
C. chromium
D. vanadium

20
why is tungsten alloyed with tool steel? A to retain hardness at high temperatures B to remove excess carbon from steel C to reduce hardness of the tool steel D to increase strength at low temperatures
C to reduce hardness of the tool steel
21
which element, in percentages of 1% to 15%, increases the toughness and hardenability of steel? A. magnesium B. manganese C. molybdenum D. mercury
B. manganese
22
What are small amounts of nickel, chromium or molybdenum added to low alloy steel? A. to decrease tensile strength and hardenability B. so electrode selection is not so restricted C. welding procedures do not have to be controlled D. to increase strength, hardness and toughness
D. to increase strength, hardness and toughness
23
what is one advantage of using low alloy steels? A. a wider selection of electrodes is available. B. they increase the weight and thickness of welded structures C. They improve resistance to heat and corrosion D. welding procedures are less stricted
C. They improve resistance to heat and corrosion
24
which steels are designed to provide improved strength, corrosion resistance or notch toughness while retaining good weldability? A. SMAW B.ASTM C. ASME D. HSLA
D. HSLA
25
what is one characteristic of high strength low alloy steels? A. they have a higher strength-to-weight ratio than carbon steels B. they have a lower strength-to-weight ratio than carbon steel C. HSLA steels do not require any preheat prior to welding. D. they cannot be welded using GMAW, FCAW or SAW
A. they have a higher strength-to-weight ratio than carbon steels
26
how are the mechanical properties of low alloy SMAW electrodes improved over low carbon electrodes? A by adding elements to the coating B by adding alloying elements to the core wire only C by restricting their use to reverse polarity only D by using high heats and making large weld deposits
A by adding elements to the coating
27
The slag of an E10018 is similar to the slag of which electrode? A. E6010 B. E7014 C. E7018 D. E7024
C. E7018
28
what is the major ingredient in the coating of an E9018? A. cellulose B. lime C. iron oxide D. titanium dioxide
B. lime
29
in the AWS classification system for ow alloy electrodes, what identifies the specific addictions for alloys? A the last two digits B the first three digits C the prefixes D the suffixes
D the suffixes
30
what the suffixes such as A1, B4 or C3 refer to in alloy electrodes? A. the welding positions recommended B. the tensile strength of the core wire C. the chemical composition of core wire D. the specific addictions of alloying elements
D. the specific addictions of alloying elements
31
the suffix A1 indicates what specific alloy has been added to the coating? A. molybdenum B. chromium C. nickel D. manganese
A. molybdenum
32
If a SMAW alloy electrode contains nickel as the major alloy addition in the coating, which letter would be in the suffix? A. A B. B C. C D. D
C. C
33
what type of material is E8018-B2L suitable For? A low alloy steels containing 0.50% to 1.25% chromium, 0.50% molybdenum B 300 series (austenitic) stainless steels C nickel alloys for cryogenic service application D high manganese steels
A low alloy steels containing 0.50% to 1.25% chromium, 0.50% molybdenum
34
what is the carbon content range for low carbon steel? A 0.00% -0.10% B 0.05% - 0.30% C 0.10% - 0.30% D 0.05% -0.25%
35
what mechanical property's increase carbon content in steel? A ductility B toughness C hardness D machinable
36
specifications for steel products organization products? 1 CSA, ASTM ___________ 2 AISI ____________ 3 SAE, AISI _____________ what do the organizations stand for?
Organization 1 Canadian standards association structural steel plate and shapes 2 American iron and steel institute steel sheet stock 3 society of automotive engineers, American iron and steel institute steel bar stock
36
CSA system type G= w= WT= R= A= AT= Q= Qt=
G= general construction W= weldable steel WT= weldable notch-tough steel R= atmospheric corrosion resistant steel A= atmospheric corrosion resistant weldable steel AT= atmospheric corrosion resistant weldable notch-tough steel Q= quenched and tempered low alloy steel plate QT= quenched and tempered low alloy notch-tough steel plate
37
what does 300w mean?
300 MPa weldable
38
AISI first digit class meaning 1 2 3 4 5 6 7 8 9
1. plane carbon 2. nickel steels 3. nickel chromium steels 4 molybdenum steels 5 chromium 6 chromium vanadium steels 7 tungsten chromium steels 8 molybdenum nickel chromium steels 9 silicon and manganese and other complex steels
39
1 iron is ____% of steel 2 carbon is ____% to less then _____% of steel 3 manages doesn't exceed ______% 4 silicon and coper do not exceed ____% 5 sulpher and phosphorus both in small amounts out of ____%
1. 95% 2 0.05% to less then 2% 3 1.65% 4 .60% 5 0.05%
40
High strength low alloy HSLA structural steels contain less then _______% carbon and less the _____% alloy additives
1 0.2% carbon 2 2.0% alloy additive
41
yield strength of HSLA steels range from ________ to _________ psi range is?
289 MPa to 760 MPA 42000 to 110 000 psi rang
41
tensile strength of HSLA steels range from ________ to _________ psi range is?
430 MPa to 860 MPa 60 000 psi to 120 000
42
AWS spec number AWS Spec title? 1 A5.5 is 2 A5.23 is 3 A5.28 is 4 A5.29 is
1 SMAW 2 SAW 3 GTAW 4 FCAW
43
A5.5 suffix meaning A= B= C= D= G= M= NM=
A= carbon-molybdenum steel electrodes B= chromium-molybdenum steel electrodes C= nickel steel electrodes D= manganese-molybdenum steel electrodes G= for all other low alloy electrodes having a minimum of specified elements M= for classifications covered by military specifications NM= nickel-molybdenum steel electrodes
44
suffix for AWS meaning for A5.28 B= NI= D= 1 or 2 = G=
B= for chromium-molybdenum steel electrodes NI= for nickel steel electrodes and rods D= for manganese-molybdenum steel electrodes and rods 1 or 2 = for other low alloy steel electrodes and rods G= subject to agreement between supplier and purchaser
45
suffix for AWS meaning for A5.29 A= B= NI= D= K or G =
A= carbon molybdenum steel electrodes B= chromium-molybdenum NI= for nickel steel electrodes and rock D= manganese-molybdnum steel electrodes K or G = for all other low alloy steel and rods

welding 201c (6 decks)

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