Show New Nev Steels tees Due to Molecule Studies Philadelphia American American industry is entering a new era in the manufacture manufacture manufacture manu manu- facture and use of tailor made steels adapted to a wide variety of purposes and made possible by scientists scientists scientists studying iron molecule by molecule the Franklin institute here was told by Dr John Johnston director of research for the United States Steel corporation Control of the heating and cooling of iron and steel during its manufacture manufacture manu facture so BO as to change the point at which iron changes from its alpha alpha Halpha al Hal pha form to its gamma phase is making possible new types of material material material ma ma- that can be fitted to new needs he asserted L A cA generation ago o he stated the technical problems facing the steel industry were related mainly to increased production of a few kinds of steel but today the object is to improve the fitness of steel at atno atno atno no greater over all cost to the pub pub- Ii lic c. c Iron is now known to exist in two forms the alpha and gamma types he explained These two types which differ in physical properties sufficiently to enable engineers to adapt them to practical use owe their existence to different arrangements arrangements arrangements arrange arrange- ments of iron atoms in the iron mol mol- And the change from one type to the other can be controlled by the processing which the iron re re- re- re The emphasis on the iron and steel business today is on producing corrosion proof metals he said Stainless steel most prominent member of the resistant corrosion-resistant family is valuable among other things because it does not rust and thin sheets can be used without the I fear that they will be damaged b blong blong by bylong I long exposure |