a heavy ductile magnetic metallic element; is silver-white in pure form but readily rusts; used in construction and tools and armament; plays a role in the transport of oxygen by the blood

an alloy of iron containing so much carbon that it is brittle and so cannot be wrought but must be shaped by casting

iron having a low carbon content that is tough and malleable and so can be forged and welded

pig iron containing a high percentage of phosphorus; used in making steel by a process that removes the phosphorus

pig iron containing a substantial proportion of slag

pig iron made entirely from ore

pig iron containing manganese; used as a deoxidizing agent and to raise the manganese content in making steel

an alloy of iron containing so much carbon that it is brittle and so cannot be wrought but must be shaped by casting

iron having a low carbon content that is tough and malleable and so can be forged and welded