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)