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Steel MakingTake Time For HardeningUneven heating and poor quenching has caused loss of many ve... Sulphur Sulphur is another impurity and high sulphur is even a greate... Steel Can Be Worked Cold As noted above, steel can be worked cold, as in the case of ... Preventing Carburizing By Copper-plating Copper-plating has been found effective and must have a thick... Plant For Forging Rifle Barrels The forging of rifle barrels in large quantities and heat-tre... Affinity Of Nickel Steel For Carbon The carbon- and nickel-steel gears are carburized separately... Composition And Properties Of Steel It is a remarkable fact that one can look through a dozen tex... Machineability Reheating for machine ability was done at 100 deg. less than ... Placing The Thermo-couples The following illustrations from the Taylor Instrument Compan... Restoring Overheated Steel The effect of heat treatment on overheated steel is shown gra... Crankshaft The crankshaft was the most highly stressed part of the entir... Complete Calibration Of Pyrometers For the complete calibration of a thermo-couple of unknown e... Annealing Of Rifle Components At Springfield Armory In general, all forgings of the components of the arms manufa... Manganese MANGANESE is a metal much like iron. Its chemical symbol is M... Placing Of Pyrometers When installing a pyrometer, care should be taken that it re... Application Of Liberty Engine Materials To The Automotive Industry The success of the Liberty engine program was an engineer... Crucible Steel Crucible steel is still made by melting material in a clay or... Sulphur SULPHUR is another element (symbol S) which is always found i... Critical Points One of the most important means of investigating the properti... Hardening The forgings can be hardened by cooling in still air or quen... |
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
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