Assertion: alloy's element | /r/HasProperty | carbon
Facets:
value: primarily
type: DEGREE
value: from iron
type: OTHER
Source sentences:
text: Aside from iron, the main element of this steel is carbon.
text: It is the interaction of the allotropes of iron with the alloying elements, primarily carbon, that gives steel and cast iron their range of unique properties.
text: The only other major alloying element in carbon steel is carbon.