Assertion: boron | /r/AtLocation | steel
Facets:
value: in the form of ferroboron
type: OTHER
value: for strength
type: PURPOSE
value: usually
type: TEMPORAL
value: as ferroboron
type: LOCATION
Source sentences:
text: Boron is added to steel as ferroboron (~12-24% B).
text: Boron is added to steel for extra hardness and strength at high temperatures.
text: (Usually boron is added to steel in the form of ferroboron