Steel Processing and Conversion Volume 3, No. 5 (Paperback)

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1917 Excerpt: ...oiled. This costs but little extra and assists in prevention of rust during transportation, storing, handling and manufacture of the parts. Condensation of the atmosphere in a freight car is bound to occur, and few cars have roofs which are rain or snow proof, and most storing spaces for the sheets are damp or not of the same temperature as the steel when being stored, which also causes condensation. Perspiration and hand marks as well as scratching in handling are largely avoided when the sheet are properly oiled, and it is best to carry this oil on the sheet through manufacture until the part is ready for enameling or priming, when the oil may be readily removed by gasoline. A scratch requires a lot of work to undo, and the labor cure is much more expensive than the oil prevention. If it is necessary to have a sheet square on all four corners they must be ordered resquared. Otherwise the usual variation of 1-in. in length and l/-'m. width must be allowed. Unless highly finished sheets are ordered in carload lots they should be crated, as they will be absolutely ruined in transportation and neither the shipper nor carrier will guarantee against damage. Sheets should be specified under the division they belong, and it is usually best to state to the mill just what the sheets are to be used for, and whether it is a painted or enameled or nickel plated job. Always order, if posible, in the base sizes in order to eliminate the size extras. As most automobile sheets are No. 19, 20, 21 and 22 ga., the corresponding base widths are between 24-in. and 36-in. inclusive, and the lengths from 60-in. to 132-in. inclusive. Fractional sizes within these limits may be ordered without extra, but narrower or wider, shorter or longer sizes carry extras. No. 17 and No. 18 ga...