Show MANGANESE I ALLOY AND EFFECT ON UN STEEl Alloys Allo s 's of manganese are treat treated d In Inn InI n I circular Issued b by the lie Colorado school chool of ot mines It say as a's that manganese ane e Is used In the st steel Industry fn In the lie form Corm of ot two alloys allos ferro manganese nese and These are both allo alloys allos 8 of ot iron manganese carbon Ferro Ferro- mans may contain as much as 80 per ent cent of ot manganese but a ara averages ra cs In this country countr about 70 0 per cent In Iii the he percentage percent of oC manganese manga nese is much lower lowel the standard figure figure fig fig- ure nrc upon which the lie price Is I based Is 20 0 per pel cent The era a average e manganese content content content con con- tent Is 18 about IS 18 per pem cent Both alloys allos are ate high In combined carbon the amount of which runs to 7 i per cent The TIme manganese alloys are arc added to molt molten n steel from the converter con or open-hearth open furnace Curn ct for Cor the purpose of oC introducing both manganese and nd carbon car car- bon boa The man manganese cleanses the lie steell steel by l b combining with the contained OX- OX oxygen Jell gen and amid md to some som extent with the thesul ul and then lien carries c thea the Impurities I Into the slag I 1 a The carbon is for tho the purpose or of of giving the steel the lie re required required re- re hardness and strength th D By Dy adding add add- In Ini ing larger larer amounts amount of oC the alloys manganese man man- steel Is produced which Is noted for Cor Its Jt hardness tenacity and and durability ity It is much used in the wearing parts of oC hc heavy machinery In recent years cars the lie has been to use i ferro anese and less o on account of ot tho the much smaller amount mount of oC man ferro feno fermo l that it H Is necessary to add to the st steel en u usually has to be melted in a cupola furnace mince before using but ferro- ferro can be added direct The TIme latter hatter also Introduces less carbon which sometimes is an advantage ad manganese Ferro and are produced b by smelting smelling a mixture of manganese ml ore and Iron ore In an or ordinary or- or blast furnace A high h temperature tempera tempera- ture is required and the tIme amount of or fuel ul used is much greater s-reater than In iii lion iron smelting A considerable amount of the manganese goes into lie tho slag The Tue slag shag from n a terre manganese e furnace ma ma- may contain as ae much ns as 10 per cent of oe manganese man A considerable tonnage of ot the Iron manganese alloys allos Is now how produced produced produced pro pro- I in the lie electric furnace |