| The news that, for several years at any rate, George Street, Edinburgh, was haunted, wrote a correspondent of mine some short time ago, might cause no little surprise to many of its inhabitants. And my friend proceeded to relate his experienc... Read more of Jane Of George Street Edinburgh at Scary Stories.ca |  InformationalPrivacy |
Steel MakingLiberty Motor Connecting RodsThe requirements for materials for the Liberty motor connecti... Brown Automatic Signaling Pyrometer In large heat-treating plants it has been customary to mainta... Manganese MANGANESE is a metal much like iron. Its chemical symbol is M... Annealing Of High-speed Steel For annealing high-speed steel, some makers recommend using g... Placing Of Pyrometers When installing a pyrometer, care should be taken that it re... The Care Of Carburizing Compounds Of all the opportunities for practicing economy in the heat-t... Making Steel Balls Steel balls are made from rods or coils according to size, st... Hardness Testing The word hardness is used to express various properties of me... Placing The Thermo-couples The following illustrations from the Taylor Instrument Compan... Heating Although it is possible to work steels cold, to an extent de... Process Of Carburizing Carburizing imparts a shell of high-carbon content to a low-... Suggestions For Handling High-speed Steels The following suggestions for handling high-speed steels are ... High Speed Steel For centuries the secret art of making tool steel was handed ... Quenching It is considered good practice to quench alloy steels from th... Preventing Decarbonization Of Tool Steel It is especially important to prevent decarbonization in such... Chromium Chromium when alloyed with steel, has the characteristic func... Machineability Reheating for machine ability was done at 100 deg. less than ... Protectors For Thermo-couples Thermo-couples must be protected from the danger of mechanica... Hardening High-speed Steel In forging use coke for fuel in the forge. Heat steel slowly ... Fatigue Tests It has been known for fifty years that a beam or rod would fa... |
High-chromium Or Rust-proof SteelCategory: ALLOYS AND THEIR EFFECT UPON STEEL High-chromium, or what is called stainless steel containing from 11 to 14 per cent chromium, was originally developed for cutlery purposes, but has in the past few years been used to a considerable extent for exhaust valves in airplane engines because of its resistance to scaling at high temperatures. Percentage Carbon 0.20 to 0.40 Manganese, not to exceed 0.50 Phosphorus, not to exceed 0.035 Sulphur, not to exceed 0.035 Chromium 11.50 to 14.00 Silicon, not to exceed 0.30 The steel should be heated slowly and forged at a temperature above 1,750 deg.F. preferably between 1,800 and 2,200 deg.F. If forged at temperatures between 1,650 and 1,750 deg.F. there is considerable danger of rupturing the steel because of its hardness at red heat. Owing to the air-hardening property of the steel, the drop-forgings should be trimmed while hot. Thin forgings should be reheated to redness before trimming, as otherwise they are liable to crack. The forgings will be hard if they are allowed to cool in air. This hardness varies over a range of from 250 to 500 Brinell, depending on the original forging temperature. Next: Annealing Previous: Effect Of A Small Amount Of Copper In Medium-carbon Steel
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