| http://www.w3.org/ns/prov#value | - um, niobium, titanium and vanadium, and mixtures thereof, in an effective amount for grain refining of about 0.03 to about 0.20% iron balance.While aluminum, niobium (i.e., columbium), titanium and vanadium act as grain refiners, vanadium is the most preferred of the grain refiners.
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