In mild steel carbon percentage ranges in between
- A0.15 – 0.25%Correct
- B0.25 – 0.35%
- C0.35 – 0.45%
- D0.45 – 0.55%
Solution
Concept
Mild steel is low-carbon steel. Its carbon content is about 0.15% to 0.25%.
Step-by-step solution
1. Steel is grouped by carbon content. 2. Mild (low carbon) steel has about 0.15 - 0.25% carbon. 3. Medium carbon steel has about 0.3 - 0.6% carbon. 4. So the answer is 0.15 - 0.25%.
Explanation
Mild steel has low carbon, about 0.15% to 0.25%. Low carbon makes it ductile, easy to weld and easy to bend. This is why it is used for structural sections and plain bars.
Why the other options are wrong
B, C, D: These ranges have more carbon. They belong to medium carbon steel, which is harder and less ductile.
Shortcut
Mild steel = low carbon = about 0.2%.
Common mistake
Confusing mild steel with medium carbon steel.
Correct answer: A) 0.15 – 0.25%