Which statement best describes the comparison between steel and cast iron in terms of machinability and heat response?

Which statement best describes the comparison between steel and cast iron in terms of machinability and heat response?

• A. Steel is generally machinable, ductile, weldable; cast iron is harder and more brittle but wears well; steel expands/softens with heat while cast iron can crack if overheated.
• B. Cast iron is generally easier to machine and weld than steel.
• C. Steel is harder and more brittle than cast iron.
• D. Both metals respond identically to heat.

Answer: (B)