PDF STEEL FOUNDERS' SOCIETY OF AMERICA Standard Specification for ZIRCON ...
Zircon Sand 5..Composition 1 Primaril y for use as either a molding sand or as a core sand in the production of steel castings. Zircon Flour Th e chemical composition shall conform in general to the following limitations: Zircon _____ percent minimum As an additive to zircon sand when used as