Assertion: cobalt | /r/HasProperty | alloyed with iron
Facets:
value: often
type: TEMPORAL
Source sentences:
text: When cobalt is alloyed with the other two ferromagnetic elements, iron and nickel, it forms alnico, an alloy of unusual and strong magnetic properties, often used in jet and gas turbine engines.
text: Cobalt used in jewelry is often alloyed with metals such as chromium, tungsten and iron.
text: When alloyed with iron and nickel, cobalt produces a strong magnet.