A sample of steel (Fe-Mn-0.05C) is to be placed in service at a constant temperature of 75 °C. What percent of Manganese should the alloy have to avoid brittle state/condition? Use the following information:
A sample of steel (Fe-Mn-0.05C) is to be placed in service at a constant temperature of 75 °C. What percent of Manganese should the alloy have to avoid brittle state/condition? Use the following information:
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Transcribed Image Text:A sample of steel (Fe-Mn-0.05C) is to be placed in service at a constant
temperature of 75 °C. What percent of Manganese should the alloy have to avoid brittle
state/condition? Use the following information:
Transcribed Image Text:Variation in ductile-to-brittle transition temperature with alloy composition.
(a) Charpy V-notch impact energy with temperature for plain-carbon steels with various
carbon levels (in weight percent). (b) Charpy V-notch impact energy with temperature
for Fe-Mn-0.05C alloys with various manganese levels (in weight percent). (From
Metals Handbook, 9th ed., Vol. 1, American Society for Metals, Metals Park, OH, 1978.)
Impact energy, J
Impact energy, J
300
250
200
150
100
50
250
200
150
100
50
-50
0
-50
-100
-100
0
2% Mn
-25
0
Temperature, F
-50 0 50
50
100
0.20% C
200
100
Temperature, °C
(a)
0 25
0.41% C
0,31% C
Temperature, F
100
150
1% Mn
300
50
75
Temperature, ��C
(b)
0.11% C
150
400
200
100
0.80% C
T
0.60% C
0.49% 69% 50
25
250
0.5% Mn
175
150
125
125
100
0
200 250
75
300
0% Mn
T
Impact energy, ft-lb
200
150
100
50
0
150
Impact energy, ft-lb
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