| In a plain home, in the town of Litchfield, Conn., was born, June 14, 1811, Harriet Beecher Stowe. The house was well-nigh full of little ones before her coming. She was the seventh child, while the oldest was but eleven years old. Her father, Rev. L... Read more of HARRIET BEECHER STOWE. at Biographical.ca |  Informational.caPrivacy |
Steel MakingHints For Tool Steel UsersDo not hesitate to ask for information from the maker as to t... Flange Shields For Furnaces Such portable flame shields as the one illustrated in Fig. 1... Heat Treatment Of Gear Blanks This section is based on a paper read before the American Gea... Correction For Cold-junction Errors The voltage generated by a thermo-couple of an electric pyrom... Detrimental Elements Sulphur and phosphorus are two elements known to be detrimen... Heating Of Manganese Steel Another form of heat-treating furnace is that which is used ... Corrosion This steel like any other steel when distorted by cold worki... Non-shrinking Oil-hardening Steels Certain steels have a very low rate of expansion and contract... Composition Of Transmission-gear Steel If the nickel content of this steel is eliminated, and the pe... Hardening Steel is hardened by quenching from above the upper critical.... For Milling Cutters And Formed Tools FORGING.--Forge as before.--ANNEALING.--Place the steel in a ... Steel Before The 1850's In spite of a rapid increase in the use of machines and the ... Open Hearth Process The open hearth furnace consists of a big brick room with a l... Application To The Automotive Industry The information given on the various parts of the Liberty eng... Furnace Data In order to give definite information concerning furnaces, fu... The Penetration Of Carbon Carburized mild steel is used to a great extent in the manufa... The Thermo-couple With the application of the thermo-couple, the measurement of... Piston Pin The piston pin on an aviation engine must possess maximum res... Silicon Silicon prevents, to a large extent, defects such as gas bubb... Conclusions Martien was probably never a serious contender for the honor ... |
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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