Assertion: mild steel's carbon | /r/CapableOf | make thin layer of steel
Facets:
value: through a process
type: MANNER
value: on the surface
type: LOCATION
Source sentences:
text: By heating thin iron rods in a carbon-rich forge, carbon could be added to the surface, making a thin layer of steel on the surface through a process called carburization (see also case hardening).