Steel is how many times stronger than concrete?

• A. 10 Times
• B. 12 Times
• C. 20 Times
• D. 15 Times

Answer: (D)

Steel offers far higher tensile strength and ductility than concrete, while concrete is very strong in compression but weak in tension. A common rule-of-thumb used in construction education states that steel is about 15 times stronger than concrete, reflecting the large gap in tensile-capacity between the two materials. This big difference is why reinforced concrete works so well: the steel reinforcement carries the tensile stresses, and the concrete handles the compression, making the composite much stronger than either material alone. Exact values vary with concrete mix and steel grade, but 15 times is a standard teaching estimate.