What are the primary components of steel?

What are the primary components of steel?

• A. Iron ore, carbon and chromium
• B. Iron ore, carbon and an alloy agent
• C. Iron ore, carbon and nickel
• D. Iron ore, carbon and copper

Answer: (C)

Steel is an alloy formed mainly from iron with carbon as the key additive; that small amount of carbon changes iron into a hard, strong material. To tailor properties for different uses, other alloying elements are added. Nickel is a common choice in many steel grades to improve toughness and strength, so describing the composition as iron ore, carbon, and nickel aligns with how steel is routinely engineered: iron from ore, carbon as the primary hardening element, and nickel as a representative alloying addition. The other options rely on vague terms or elements that aren’t universally considered part of the standard description of steel’s primary components, making the nickel-containing description the best fit among the given choices.

Steel is an alloy formed mainly from iron with carbon as the key additive; that small amount of carbon changes iron into a hard, strong material. To tailor properties for different uses, other alloying elements are added. Nickel is a common choice in many steel grades to improve toughness and strength, so describing the composition as iron ore, carbon, and nickel aligns with how steel is routinely engineered: iron from ore, carbon as the primary hardening element, and nickel as a representative alloying addition. The other options rely on vague terms or elements that aren’t universally considered part of the standard description of steel’s primary components, making the nickel-containing description the best fit among the given choices.