| A traveler in the South chatted with an aged negro, whom he met in the road. "And I suppose you were once a slave?" he remarked. "Yes, suh," the old colored man answered. "And, so, after the war, you gained your freedom," the gentleman ... Read more of Slavery at Free Jokes.ca |  Informational.caPrivacy |
Steel MakingProperties Of Alloy SteelsThe following table shows the percentages of carbon, manganes... Furnace Data In order to give definite information concerning furnaces, fu... Annealing Work With the exception of several of the higher types of alloy s... Using Illuminating Gas The choice of a carburizing furnace depends greatly on the fa... Corrosion This steel like any other steel when distorted by cold worki... Composition And Properties Of Steel It is a remarkable fact that one can look through a dozen tex... Temperatures To Use As soon as the temperature of the steel reaches 100 deg.C. (... Temperature For Annealing Theoretically, annealing should be accomplished at a tempera... Hardening The forgings can be hardened by cooling in still air or quen... Restoring Overheated Steel The effect of heat treatment on overheated steel is shown gra... The Effect The heating at 1,600 deg.F. gives the first heat treatment w... Cyanide Bath For Tool Steels All high-carbon tool steels are heated in a cyanide bath. Wi... Annealing ANNEALING can be done by heating to temperatures ranging from... Annealing Of High-speed Steel For annealing high-speed steel, some makers recommend using g... Tungsten Tungsten, as an alloy in steel, has been known and used for a... Cutting-off Steel From Bar To cut a piece from an annealed bar, cut off with a hack saw,... Refining The Grain This is remedied by reheating the piece to a temperature slig... Shrinking And Enlarging Work Steel can be shrunk or enlarged by proper heating and cooling... The Pyrometer And Its Use In the heat treatment of steel, it has become absolutely nece... Robert Mushet Robert (Forester) Mushet (1811-1891), born in the Forest of D... |
Carbon Steels For Different ToolsCategory: HARDENING CARBON STEEL FOR TOOLS All users of tool steels should carefully study the different qualities of the steels they handle. Different uses requires different kinds of steel for best results, and for the purpose of designating different steels some makers have adopted the two terms temper, and quality, to distinguish between them. In this case temper refers to the amount of carbon which is combined with the iron to make the metal into a steel. The quality means the absence of phosphorous, sulphur and other impurities, these depending on the ores and the methods of treatment. Steel makers have various ways of designating carbon steels for different purposes. Some of these systems involve the use of numbers, that of the Latrobe Steel Company being given herewith. It will be noted that the numbers are based on 20 points of carbon per unit. The names given the different tempers are also of interest. Other makers use different numbers. The temper list follows: LATROBE TEMPER LIST OF CARBON TOOL STEELS No. 3 temper 0.60 to 0.69 per cent carbon No. 3-1/2 temper 0.70 to 0.79 per cent carbon No. 4 temper 0.80 to 0.89 per cent carbon No. 4-1/2 temper 0.90 to 0.99 pet cent carbon No. 5 temper 1.00 to 1.09 per cent carbon No. 5-1/2 temper 1.10 to 1.19 per cent carbon No. 6 temper 1.20 to 1.29 per cent carbon No. 6-1/2 temper 1.30 to 1.39 per cent carbon No. 7 temper 1.40 to 1.49 per cent carbon Next: Uses Of The Various Tempers Of Carbon Tool Steel Previous: Carbon In Tool Steel
Viewed 735 |
||||||||||||||||||||
