#pig_iron__pigiron  crude iron tapped from a blast furnace
  supertype:  Fe__iron__atomic_number_26  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
  substance of:  cast_iron  wrought_iron
  subtype:  basic_iron__basiciron  pig iron containing a high percentage of phosphorus; used in making steel by a process that removes the phosphorus
  subtype:  cinder_pig  pig iron containing a substantial proportion of slag
  subtype:  mine_pig  pig iron made entirely from ore
  subtype:  spiegeleisen__spiegel__spiegel_iron__spiegeliron  pig iron containing manganese; used as a deoxidizing agent and to raise the manganese content in making steel

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