. Sheet metal workers' manual; a complete, practical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process . Figure 300A.—Layout of Shop with Induced-Draft Forges. produced cement or blister steel and shear steel. Incommercial importance, the processes rank, open hearth,Bessemer, and crucible. It was not until the open hearthand Bessemer processes came into use that steel beganto supplant wrought iron to any extent. Open Hearth Steel.—This method of making steel wasdiscovered about the year 1845. It is un
. Sheet metal workers' manual; a complete, practical instruction book on the sheet metal industry, machinery and tools, and related subjects, including the oxy-acetylen welding and cutting process . Figure 300A.—Layout of Shop with Induced-Draft Forges. produced cement or blister steel and shear steel. Incommercial importance, the processes rank, open hearth,Bessemer, and crucible. It was not until the open hearthand Bessemer processes came into use that steel beganto supplant wrought iron to any extent. Open Hearth Steel.—This method of making steel wasdiscovered about the year 1845. It is under better con-trol than the Bessemer process, since at any time it affordsopportunity for testing and for making such additions HAND FORGING AND WELDING 391 as may be necessary to yield the desired product. Theopen hearth furnace also permits of the highest tempera-ture without requiring a strong draft. These furnacesare built to hold from ten to fifty tons of metal. Thetime for an operation or heat is from eight to elevenhours. Steel rails, structural materials, plates, etc., areproduced by this process. Bessemer Steel.—The Bessemer process is named afterits inventor, Sir Henry Besse
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Keywords: ., bookcentury1900, bookdecade1910, bookidsheetmetalwo, bookyear1918
