What is the typical carbon content percentage in low carbon steels__________________?
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Answer: B. 0.15%
Explanation
Low carbon steels, frequently designated as mild steels, contain very low percentages of carbon to maintain high formability. A typical carbon content of approximately zero point fifteen percent provides a balance between adequate strength and excellent ductility. This low carbon concentration prevents the formation of brittle martensite during welding or ambient cooling. Plain carbon steels are classified into low, medium, and high carbon categories based on their carbon weight percentages. Low carbon steels cannot be effectively heat-treated by quenching because they lack sufficient carbon to form hard martensite. Their microstructure consists primarily of soft ferrite grains with small localized pockets of pearlite.
Option A of zero point zero five percent represents extremely low interstitial-free steel used for specialized deep drawing applications. Option C of zero point three percent carbon enters the medium carbon steel range, which exhibits higher strength but reduced weldability. Options D and E represent high carbon steels used for springs, cutting tools, and high-strength wire ropes.
- Subject
- Engineering
- Category
- Mechanical Engineering
- Topic
- —
- Difficulty
- medium
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