Which ferrous alloy is specifically described as tool steel?

Which ferrous alloy is specifically described as tool steel?

• A. Stainless steel
• B. High speed steel
• C. Cast Iron
• D. Die steel (tool)

Answer: (D)

Tool steels are made for use in tools because they are hard and wear-resistant, able to hold a sharp edge under demanding use. Among the ferrous alloys listed, die steel fits this description most directly because it is a type of tool steel specifically used to make dies for stamping and forming processes. That purpose-oriented name aligns with the idea of “tool steel” and explains why it’s the best match. The others don’t fit as cleanly: stainless steel emphasizes corrosion resistance, not tool use; cast iron is typically brittle and not chosen for cutting tools; high speed steel is indeed a tool steel category, but the option named die steel is the one most explicitly described as tool steel in common classifications.

Tool steels are made for use in tools because they are hard and wear-resistant, able to hold a sharp edge under demanding use. Among the ferrous alloys listed, die steel fits this description most directly because it is a type of tool steel specifically used to make dies for stamping and forming processes. That purpose-oriented name aligns with the idea of “tool steel” and explains why it’s the best match. The others don’t fit as cleanly: stainless steel emphasizes corrosion resistance, not tool use; cast iron is typically brittle and not chosen for cutting tools; high speed steel is indeed a tool steel category, but the option named die steel is the one most explicitly described as tool steel in common classifications.