| While working on a sermon the pastor heard a knock at his office door. "Come in," he invited. A sad-looking man in threadbare clothes came in, pulling a large pig on a rope. "Can I talk to you for a minute?" asked the ma... Read more of Lessons From The Ark at Free Jokes.ca |  InformationalPrivacy |
Steel MakingTungstenTungsten, as an alloy in steel, has been known and used for a... Calibration Of Pyrometer With Common Salt An easy and convenient method for standardization and one whi... Quenching It is considered good practice to quench alloy steels from th... Pyrometry And Pyrometers A knowledge of the fundamental principles of pyrometry, or th... Bessemer Process The bessemer process consists of charging molten pig iron int... High Speed Steel For centuries the secret art of making tool steel was handed ... Cutting-off Steel From Bar To cut a piece from an annealed bar, cut off with a hack saw,... Connecting Rods The material used for all connecting rods on the Liberty engi... Annealing There is no mystery or secret about the proper annealing of d... Silicon SILICON is a very widespread element (symbol Si), being an es... Heat Treatment Of Gear Blanks This section is based on a paper read before the American Gea... Blending The Compound Essentially, this consists of the sturdy, power-driven separa... Tempering Colors On Carbon Steels Opinions differ as to the temperature which is indicated by t... Steel Worked In Austenitic State As a general rule steel should be worked when it is in the a... Preventing Carburizing By Copper-plating Copper-plating has been found effective and must have a thick... Open Hearth Process The open hearth furnace consists of a big brick room with a l... Carbon Tool Steel Heat to a bright red, about 1,500 to 1,550 deg.F. Do not ham... Affinity Of Nickel Steel For Carbon The carbon- and nickel-steel gears are carburized separately... Process Of Carburizing Carburizing imparts a shell of high-carbon content to a low-... Gas Consumption For Carburizing Although the advantages offered by the gas-fired furnace for ... |
Effect Of A Small Amount Of Copper In Medium-carbon SteelCategory: ALLOYS AND THEIR EFFECT UPON STEEL This shows the result of tests by C. R. Hayward and A. B. Johnston on two types of steel: one containing 0.30 per cent carbon, 0.012 per cent phosphorus, and 0.860 per cent copper, and the other 0.365 per cent carbon, 0.053 per cent phosphorus, and 0.030 per cent copper. The accompanying chart in Fig. 13 shows that high-copper steel has decided superiority in tensile strength, yield point and ultimate strength, while the ductility is practically the same. Hardness tests by both methods show high-copper steel to be harder than low-copper, and the Charpy shock tests show high-copper steel also superior to low-copper. The tests confirm those made by Stead, showing that the behavior of copper steel resembles that of nickel steel. The high-copper steels show finer grain than the low-copper. The quenched and drawn specimens of high-copper steel were found to be slightly more martensitic. Next: High-chromium Or Rust-proof Steel Previous: Non-shrinking Oil-hardening Steels
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