Iron Alloys
Very few of the metals alloy with cast iron in such a manner as to be of any practical value to the founder. True, there is a marked difference in the resultant mixture by the addition of alloys, but it does not affect them favorably as a rule. By the addition of a quarter of one per cent of copper, well stirred into the molten iron, a perceptible increase of density may be noticed, and the strength is increased somewhat. Again, if from 10 to 15 per cent of wrought scraps can be successfully mixed with the cast iron after the latter has been melted the same improvements are apparent. Much is claimed for the aluminum fluxes now offered, but any opinion as to their worth would, at this early stage of their application, be premature. See ALLOYS; ALUMINUM; GOLD.