Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Textbook Question
Chapter 6, Problem 25RQ
What is the significance of the last two digits in a typical four�digit AISI–SAE steel designation?
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Q14
Table Q2
Steel
(Low
Low Carbon
Medium Carbon
High Carbon
Alloys)
(<0.25 wt% C)
(0.25 – 0.6 wt% C)
(0.6 – 1.4 wt% C)
Туре
With
With
With
Plain
Plain
Plain
Property
Additive
Additive
Additive
Hardness
Low
Medium
Medium
High
High
Very high
Ductility
High
Medium
Medium
Low
Low
Very low
d) Based on Table Q2, describe a suitable class of steels that can be used in the following
applications.
(i) Railway tracks
(i1) Cutting tools
Answer with true (T) or false (F), corrects the wrong phrases, and gives short reason(s) for
correct and corrected statements:
1- Normalized steels have better strength and toughness as compared to annealed steels.
2- Ferrous alloys are most important and widely used in comparison to any other metals.
3- Metals of BCC crystal structure are denser than metals of FCC structure.
4- Hypo-eutectoid steels fully annealed by heating to about 30°C above the upper critical temperature.X A3
5- The full martensite microstructure can be obtained by cooling the steels with any cooling rate.
6- There is a large volume expansion when martensite forms from austenite.,
Chapter 6 Solutions
Degarmo's Materials And Processes In Manufacturing
Ch. 6 - Why might it be important to know the prior...Ch. 6 - What is a ferrous material?Ch. 6 - How does the amount of steel that is recycled...Ch. 6 - Why is the recycling of steel so attractive...Ch. 6 - When iron ore is reduced to metallic iron, what...Ch. 6 - What properties or characteristics have made steel...Ch. 6 - What is involved in the conversion of pig iron...Ch. 6 - What are some of the modification processes that...Ch. 6 - What is the advantage of pouring molten metal from...Ch. 6 - What are some of the attractive economic and...
Ch. 6 - Prob. 11RQCh. 6 - What are some of the techniques used to reduce the...Ch. 6 - How might other gases, such as nitrogen and...Ch. 6 - What are some of the attractive features of...Ch. 6 - What is plain�carbon steel?Ch. 6 - What is considered a low�carbon steel?...Ch. 6 - What properties account for the high�volume use...Ch. 6 - Why should plain�carbon steels be given first...Ch. 6 - What are some of the common alloy elements added...Ch. 6 - For what different reasons might alloying elements...Ch. 6 - What are some of the alloy elements that tend to...Ch. 6 - While strength and hardness are dependent on the...Ch. 6 - What alloys are particularly effective in...Ch. 6 - What is the basis of the AISI–SAE classification...Ch. 6 - What is the significance of the last two digits in...Ch. 6 - How are letters incorporated into the AISI–SAE...Ch. 6 - What is an H�grade steel, and when should it be...Ch. 6 - Why should the proposed fabrication processes...Ch. 6 - How are the final properties usually obtained in...Ch. 6 - Prob. 30RQCh. 6 - Prob. 31RQCh. 6 - Prob. 32RQCh. 6 - What is the primary attraction of the...Ch. 6 - Prob. 34RQCh. 6 - What are the two phases that are present in...Ch. 6 - What is the transformation that occurs during the...Ch. 6 - Prob. 37RQCh. 6 - Prob. 38RQCh. 6 - Prob. 39RQCh. 6 - Describe the role of steel in the automotive...Ch. 6 - Prob. 41RQCh. 6 - Prob. 42RQCh. 6 - What are some of the compromises associated with...Ch. 6 - What factors might be used to justify the added...Ch. 6 - What are some of the coating materials that have...Ch. 6 - What are soft magnetic materials?Ch. 6 - Prob. 47RQCh. 6 - What are maraging steels, and for what conditions...Ch. 6 - Prob. 49RQCh. 6 - Prob. 50RQCh. 6 - Prob. 51RQCh. 6 - Why should ferritic stainless steels be given...Ch. 6 - Which of the major types of stainless steel is...Ch. 6 - Under what conditions might a martensitic...Ch. 6 - Prob. 55RQCh. 6 - How can an austenitic stainless steel be easily...Ch. 6 - Prob. 57RQCh. 6 - Prob. 58RQCh. 6 - Prob. 59RQCh. 6 - Prob. 60RQCh. 6 - What is a tool steel?Ch. 6 - How does the AISI–SAE designation system for...Ch. 6 - What is the least expensive variety of tool steel?Ch. 6 - Prob. 64RQCh. 6 - What alloying elements are used to produce the...Ch. 6 - What assets can be provided by the...Ch. 6 - Prob. 67RQCh. 6 - Prob. 68RQCh. 6 - Describe the microstructure of gray cast iron.Ch. 6 - Which of the structural units is generally altered...Ch. 6 - What are some of the attractive engineering...Ch. 6 - What are some of the key limitations to the...Ch. 6 - Prob. 73RQCh. 6 - How is malleable cast iron produced?Ch. 6 - What structural feature is responsible for the...Ch. 6 - Prob. 76RQCh. 6 - What is the purpose of inoculation when making...Ch. 6 - What is fading? Why should ductile iron be...Ch. 6 - What requirements of ductile iron manufacture are...Ch. 6 - What are some of the attractive features of...Ch. 6 - Compacted graphite iron has a structure and...Ch. 6 - What are some of the reasons that alloy additions...Ch. 6 - What properties are enhanced in the high�alloy...Ch. 6 - When should cast steel be used instead of a cast...Ch. 6 - In what ways might a cast steel be more difficult...Ch. 6 - Why are standard geometry test bars often cast...Ch. 6 - Prob. 1PCh. 6 - Select from among the common hand tools in the...Ch. 6 - Prob. 3PCh. 6 - Identify a particular product that has been...Ch. 6 - Prob. 5PCh. 6 - Select among the components in the following list,...Ch. 6 - Prob. 7PCh. 6 - Prob. 8PCh. 6 - Prob. 1CSCh. 6 - Prob. 2CSCh. 6 - Surface Treatment—Depending on the material...
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- What two organizations have developed systems for classifying standard construction grades of steel?arrow_forwardWhat is the maximum allowable percentage of manganese in carbon steel as defined by the AISI classification for carbon steel?arrow_forwardIn the AISI steel alloy group numbering system, alloys ASI 40 XX through the ASI 48XX are vanadium based alloy steels. True or false.arrow_forward
- For each question, provide an explanation, identifying the correct choice ( it is marked in red) and explaining why it's the right answer, as well as why the other options are incorrect. Please do 1, 2.arrow_forwardTable Q2 Steel (Low Low Carbon Medium Carbon High Carbon Alloys) (<0.25 wt% C) (0.25 – 0.6 wt% C) (0.6 – 1.4 wt% C) Туре With With With Plain Plain Plain Property Additive Additive Additive Hardness Low Medium Medium High High Very high Ductility High Medium Medium Low Low Very low A mechanical properties table with different type of steels is shown in Table Q2. a) Based on Table Q2, describe the relationship of hardness and ductility. b) Suggest two methods to improve the hardness of steels by referring to Table Q2. c) Elaborate the reasons the two methods in Q2(b) can be used to improve the hardness of steels.arrow_forwardBoth for Ferritic and Martimenistic sstainless steel belong to the AISI 400 series. Farris stainless steel's are heat treatable grades and Martinisitic stick stainless steel's can only be strain hearted to improve their mechanical properties. True or falsearrow_forward
- Identify the correct alloy that has the highest compressive strength property from the following options. Cast Iron O Aluminium O Carbon Steel O Mild Steelarrow_forward11. Identify the correct alloy that can be case hardened from the following options a. Aluminum b. Carbon Steel c. Mild Steel d. Cast Iron 12. British Standard code BS2875 refers to a. Izod impact test b. Composition and properties of copper and copper alloy c. Graphical symbols used in technical drawings d. Charpy impact testarrow_forwardAny steel used as a tool may be technically classified as a tool steel. However, the term "tool steel" is usually restricted to high-quality specialty steels used for cutting or forming purposes. True False Both Ferritic and Martensitic stainless steels belong to the AISI 400 series. Ferritic stainless steels are heat-treatable grades and martensitic stainless steels can only be strain hardened to improve their mechanical properties. True False The RIM (Reaction Injection Molding) process does not require the plastic materials to be heated before molding. True False An aluminum alloy designated as 3003-H16 aluminum means the following: 3XXX aluminum-manganese alloy, which has not been modified, specific alloy 03 in the alloy series, strain hardened only, with a 3/4 hard temper. True False Titanium is extensively used for jet engine components (rotors, fins, and compressor parts) and other aerospace parts because it is as strong as aluminum and 45 percent…arrow_forward
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