Assertion: alloy's iron | /r/HasProperty | metal
Facets:
Source sentences:
text: The major component of steel is iron, a metal that in its pure state is not much harder than copper.
text: Furthermore, iron is one metal that makes many alloys other than steel with substances such as manganese, chromium, vanadium, and tungsten etc.
text: Steel is an alloy consisting mainly of iron, which is metal, but not heavy metal.
text: Cast iron is an example, as it is a combination of iron (metal) and carbon (non-metal).