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Steel MakingForging High-speed SteelHeat very slowly and carefully to from 1,800 to 2,000 deg.F.... Correction By Zero Adjustment Many pyrometers are supplied with a zero adjuster, by means ... Annealing To Relieve Internal Stresses Work quenched from a high temperature and not afterward tempe... Tempering Round Dies A number of circular dies of carbon tool steel for use in too... Carburizing Material The simplest carburizing substance is charcoal. It is also th... Effects Of Proper Annealing Proper annealing of low-carbon steels causes a complete solu... The Effect Of Tempering On Water-quenched Gages The following information has been supplied by Automatic and ... Shrinking And Enlarging Work Steel can be shrunk or enlarged by proper heating and cooling... Sulphur Sulphur is another impurity and high sulphur is even a greate... Short Method Of Treatment In the new method, the packed pots are run into the case-har... The Influence Of Size The size of the piece influences the physical properties obta... Heat-treating Department The heat-treating department occupies an L-shaped building. ... The Care Of Carburizing Compounds Of all the opportunities for practicing economy in the heat-t... Carbon In Tool Steel Carbon tool steel, or tool steel as it is commonly called, us... Vanadium Vanadium has a very marked effect upon alloy steels rich in c... Judging The Heat Of Steel While the use of a pyrometer is of course the only way to hav... Crucible Steel Crucible steel is still made by melting material in a clay or... Heavy Forging Practice In heavy forging practice where the metal is being worked at... Cutting-off Steel From Bar To cut a piece from an annealed bar, cut off with a hack saw,... Tempering Colors On Carbon Steels Opinions differ as to the temperature which is indicated by t... |
ManganeseCategory: COMPOSITION AND PROPERTIES OF STEEL MANGANESE is a metal much like iron. Its chemical symbol is Mn. It is somewhat more active than iron in many chemical changes--notably it has what is apparently a stronger attraction for oxygen and sulphur than has iron. Therefore the metal is used (especially in the so-called basic process) to free the molten steel of oxygen, acting in a manner similar to silicon, as explained above. The compound of manganese and oxygen is readily eliminated from the metal. Sufficient excess of elemental manganese should remain so that the purchaser may be sure that the iron has been properly deoxidized, and to render harmless the traces of sulphur present. No damage is done by the presence of a little manganese in steel, quite the reverse. Consequently it is common to find steels containing from 0.3 to 1.5 per cent. Next: Alloying Elements Previous: Silicon
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