MMET 207 Exam 3 Questions and Answers | Latest Version | 2024/2025 | Graded A+
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Course
MMET 207
Institution
MMET 207
MMET 207 Exam 3 Questions and
Answers | Latest Version | 2024/2025 |
Graded A+
What is the primary difference between wrought iron and mild steel?
Wrought iron is a low-carbon iron alloy with a fibrous structure, making it ductile and
malleable, while mild steel is a carbon steel with low ...
MMET 207 Exam 3 Questions and
Answers | Latest Version | 2024/2025 |
Graded A+
What is the primary difference between wrought iron and mild steel?
✔✔Wrought iron is a low-carbon iron alloy with a fibrous structure, making it ductile and
malleable, while mild steel is a carbon steel with low carbon content, offering good weldability
and moderate strength.
What is the role of manganese in steel production?
✔✔Manganese acts as a deoxidizer and alloying element in steel, improving hardenability, wear
resistance, and tensile strength while helping to reduce brittleness.
How does the microstructure of steel influence its mechanical properties?
✔✔The microstructure of steel, including the arrangement and size of its grains and phases (like
ferrite and pearlite), directly affects its mechanical properties such as hardness, toughness, and
ductility.
What are the common applications of stainless steel?
1
,✔✔Common applications of stainless steel include kitchen appliances, medical instruments,
construction materials, and automotive components due to its corrosion resistance and aesthetic
appeal.
Explain the term "fatigue failure" in steel structures.
✔✔Fatigue failure refers to the gradual weakening of steel structures due to repetitive loading
and unloading cycles, leading to cracks that can result in sudden structural failure.
Identify the main characteristics of duplex stainless steel.
✔✔Duplex stainless steel has a mixed microstructure of austenite and ferrite, offering high
strength, excellent corrosion resistance, and improved resistance to stress corrosion cracking.
What are some common types of tool steel, and what makes them suitable for cutting tools?
✔✔Common types of tool steel include high-speed steel, cold-work steel, and hot-work steel.
Their specific alloying elements and heat treatment processes enhance hardness, wear resistance,
and ability to withstand high temperatures.
Discuss the importance of steel grades in construction.
2
, ✔✔Steel grades provide essential information about the chemical composition and mechanical
properties of steel, ensuring that the correct material is used for specific applications in
construction to meet safety and performance standards.
What is the process of "pickling" in steel treatment?
✔✔Pickling is a chemical process used to remove rust, scale, and impurities from the surface of
steel, usually involving the use of acid solutions to prepare the steel for further processing or
finishing.
How does carbon content affect the properties of steel?
✔✔Higher carbon content in steel increases its hardness and strength but decreases ductility and
toughness, making it more brittle.
What are the main categories of steel based on carbon content?
✔✔The main categories of steel based on carbon content are low-carbon steel (up to 0.3%
carbon), medium-carbon steel (0.3% to 0.6% carbon), and high-carbon steel (0.6% to 1.5%
carbon).
Describe the difference between structural steel and carbon steel.
3
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