7. Which of the following statements is suitable to describe the mechanical properties of low carbon steels and high carbon steels without cold working treatment? (a) Low carbon steels containing ferrite and pearlite phases generally have lower tensile strength than high carbon steels. (b) Low carbon steels containing cementite and pearlite phases generally have lower hardness than high carbon steels. Low carbon steels containing ferrite and cementite phases generally have higher ductility and higher hardness than high carbon steels. (d) Low carbon steels are generally less stiff than aluminum alloy.

7. Which of the following statements is suitable to describe the mechanical properties of low carbon steels and high carbon steels without cold working treatment? (a) Low carbon steels containing ferrite and pearlite phases generally have lower tensile strength than high carbon steels. (b) Low carbon steels containing cementite and pearlite phases generally have lower hardness than high carbon steels. Low carbon steels containing ferrite and cementite phases generally have higher ductility and higher hardness than high carbon steels. (d) Low carbon steels are generally less stiff than aluminum alloy.

Precision Machining Technology (MindTap Course List)

2nd Edition

ISBN:9781285444543

Author:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Publisher:Peter J. Hoffman, Eric S. Hopewell, Brian Janes

Chapter2: Measurement, Materials, And Safety

Section2.7: Heat Treatment Of Metals

Problem 8RQ: After hardening, steel is very hard and brittle. What operation is usually performed to reduce...

See similar textbooks

Similar questions

What method is used to harden low-carbon steels?
What type of hardening operation that leaves the inner core in a softer condition is sometimes performed on medium-carbon steels?
After hardening, steel is very hard and brittle. What operation is usually performed to reduce hardness and increase toughness so the steel is in a more usable condition?
What are the properties of low-alloy steel?
With respect to the S-N diagram shown below, answer the following questions:(a) for Gray cast iron, what is the projected number of cycles to failure for an induced stress of 20,000 psi?(b) What is the endurance limit and associated stress for a 0.47% heat treated carbon steel? (c) What is the endurance limit for the Aluminum-copper alloy?(d) What is the endurance strength for heat treated Alloy Steel at 400,000 cycles?
What is the difference in material property of low carbon & high carbon steels?
Explain the connection between notch strengthening and material ductility; which is more likely to notch strengthen––pure Al or martensitic steel?
3. What effects do the alloying additions have on the microstructure and mechanical properties of air-cooled (normalized) steel specimens? 1 4. What effects do the alloying additions have on the microstructure and mechanical properties of furnace-cooled (annealed) steel specimens?
In steel alloys, what is the best choice for aircraft construction? And why?
5. What is the role of austenitic gram size in martensitic transformations? Is austenitic grain size is important to the strength of martensite? What other factors are important to the strength and toughness in technological hardened steels?
Please match Heat-Treated Steels with their hardness HB numbers, according to the charts shown below. a) SAE 1040 WQT at different Temperatures b) SAE 4140 OQT at different Temperatures c) SAE 4340 OQT at different Temperatures SAE 1040 WQT 1000 SAE 4140 OQT 1000 SAE 4140 OQT 1100 SAE 4340 OQT 800 a. HB = 415 b. HB = 341 c. HB = 311 d. HB = 269
In detailed paragraph, How are stainless steels and heat-resisting steels classified?