Evening Republican, Volume 23, Number 109, Rensselaer, Jasper County, 5 May 1920 — The Way Iron “Grows." [ARTICLE]

The Way Iron “Grows."

The “growth” of cast iron is the result of repeatedly heating and cooling the cast iron parts. For instance, cast iron annealing ovens, originally eight feet in length, have grown, to a length of nine feet as the result of being kept red hot for prolonged periods between which they have been permitted to cool. Cast iron furnace grates and other parfc subjected to alternate heating and cooling are also frequently distorted and sometimes broken because of the growth. To avoid this growth or increase in size as far as possible, white cast iron having a carbon content of about three per cent and a relatively small amount of silicon and other Impurities should be used.