Document YD4og97kJ54nQbyx2y1YJj3wK

FILE NAME: Owens Illinois (OWILL) DATE: 1949 Apr DOC#: OWILL025 DOCUMENT DESCRIPTION: Journal Article - New Thermal Insulating Material Combines Light Weight and High Strength . . 9-1 W IL L IA M P. W IN S O R FRED P. PETERS Vice President and Publishing Director Vice President and Editorial Director T. C. DU M O N D H. R. CLAU SER N. B. BAGGER DORIS M. BARRY ELEANOR M. WOLFE GIL MILLER Editor Associate Editor Associate Editor Assistant Editor Assistant Editor Art Director KENNETH ROSE Western Editor I I I W, Washington St., Chicago 2, Illinois F R A N K J. A R M E IT Production Manager JO H N N. C A R L IN Circulation Manager A. A. R A Y M O N D , JR. Promotion Manager JO H N T. FO SD IC K Research Director DISTRICT MANAGERS A. E. FOUNTAIN New York FRANK J. McKINLEY 330 W. 42nd Street New York M. RANDOLPH LONG I I I W. Washington Street Chicago BEVIN SMITH 12 So. 12th Street Philadelphia D W. HUETTNER Cleveland 1133 Leader Building ROY M. MCDONALD, Roy M. McDonald & Co., Son Francisco E. T. THOMPSON, Roy M. McDonald & Co., Los Angeles HARRY ABNEY, Roy M. McDonald & Co., Seattle, Wash. Published monthly by Reinheld Publishing Corporation, 330 W est 42nd St., New York 18, N. Y ,, U. S. A. Ralph Reinhold, Chair man of the Board; Philip H. Hubbard, Pres ident; H. Burton Lowe, Executive Vice Pres ident; G. E. Cochran, Vice President and Secretary; W. P. Winsor, Vice President; F. P. Peters, Vice President; J. G. Belcher, Vice President; W. F. Traendly, Vice Presi dent; Francis M. Turner, Vice President. Price 50 cents a copy.'Payable in advance, one year, $2.00; two years, $3.00; three years, $4.00; five years, $5.00 in U. S. and Possessions, Canada and Pan American Union, $2.00 extra for each year in all other countries. (Remit by New York Draft.) Copyright, 1949, by Reinhold Publishing Corporation. Printed by Lotus Press, Inc., 508 West 26th St., New York 1, N. Y. All rights reserved. Reentered as second class matter Nov. 14, 1945, at the Post Office at New York, N. Y. under Act of March 3,1879. Established in 1929 as Metals and Alloys. Materials & Methods,, THE MAGAZINE OF MATERIALS ENGINEERING VOLUME 29, NUMBER 4 APRIL, 1949 FEATURE ARTICLES Advantages of Magnesium Die Castings 43 M agnesium com pared will) alum inum am i tine in typical cam histories R. C. Cornell Automatic Flame Hardening $teps Up Production of Steel Cams 47 Results show advantages o f local hardening by this technique Herbert Chase Forging Alloys for High Temperature Service SO Exacting requirem ents dem and high quality in alloys and forging tracthe L. S. Fulton Special Oxide Film on Steel Provides Electrical insulation 54 Tenacious blue iron oxide produced by steam atm osphere treatment P. L. Schmidt Self-Heating Tape Simplifies Soldering Operations 57 Useful fo r a variety o f assembly and repair jobs Robert B. Stanton Redesigning Metal Parts for Electric Furnace Brazing 58 M akes possible low cost fabrication o f com plex products H. M. Webber New Thermal InsulatingMaterial 63 Suited fo r high tem perature service and structural applications New Materials Preview Liquid Blasting of Metallic andNonmetallic Surfaces 64 An econom ical m ethod having a variety o f cleaning and finishing uses B. H. Marks Materials at Work 68 Interesting examples of new materials applications MATERIALS & METHODS MANUAL NO. 48 Gray Iron Castings 71 T. C. Du Mond ENGINEERING FILE FACTS No. 174-- Measurement of Close Tolerance Parts 79 DEPARTMENTS T h e Materials Outlook ................... 3 Editorial .................................................. 4 1 Materials & Methods Digest ..... 85 New Materials & Equipment .... 93 The Last W ord Manufacturers* Literature .............. 1 2 6 Meetings and Expositions .............. 144 Book Reviews ............ 146 Advertisers and Their Agencies .... 168 ............ 170 NEXT MONTH: Nodular Graphite Irons . . . Fabricating Large Metal Forms by W elding . . . New Aluminum Extruding Alloy . . . Bright Nickel Plating . . . Improving Solder Flow . . . Steam Atmosphere Treatment of Ferrous and Nonferrous Metals . . . T H E R M O SE T T IN G PLA STIC S (M aterials & M ethods M anual No. 4 9 ) New Thermal Insulating Material Combines Light Weight and High Strength -- NEW MATERIALS PREVIEW W hen engineering require ments dictate high thermal insulat ing properties along with fireproof ness, light weight and structural strength, a new material now being offered by American Structural Prod ucts Co., an Owens-Illinois subsidiary, deserves consideration. It is a hydrous calcium silicate material sold in' various forms and sizes under the brand name of Kaylo. It is manu factured in-two densities-- 11 lb. per cu. ft. and 2 0 lb. per cu. ft. T he lighter material is used principally for high temperature insulation. The heavier material is used for building pur poses, as a tile to form structural roof decks. The 20-lb. material is also used as a core for fireproof doors, fabri cated and marketed by U. S. Plywood Corp. As a rigid heat insulation, the low- density block is suitable for use at service temperatures up to 1200 F. W hile not intended as a load-carrying member of any structural unit, the insulating block is reasonably strong. Following are some of its properties: Density: about 11 lb. per cu. ft. K factor, at 300 F mean: 0.475 Maximum service temp.: 1200 F Standard sizes: W idths, 6 in. and 12 in.; length, 36 in. only; thicknesses, 1 in., m in., 2 in., 2 V i in., and 3 in. T h e lighter weight is now available only as blocks in the above range of sizes, as lagging, and in some sectional pipe covering forms. Pipe covering is still in the developmental stage. T h e more dense material is in tended primarily for building con struction. It is finding use as a fire proof roof tile, 2 % by 18 by 36 in. in size, where its effective resistance to passage o f heat helps to conserve fuel in winter and to keep the build ing cooler in summer, and its light weight reduces design loads. For this purpose it is supplied with a rein forcing of steel wire mesh to give increased strength and stiffness. The wire is embedded in the block as a wire basket, providing reinforcing in both directions. Its dimensional sta bility is another important considera tion in building construction. Some of its properties, and the available sizeSj are as follows: Density: about 20 lb. per cu. ft. K factor, at 70 F mean: 0.65 Standard sizes: W idths, 12 in. and 18 in.; lengths, 18 in. and 36 in.; thicknesses, IV a in., V>A in., and 25/s in. Use o f a block o f the 20-lb. density insulation, faced on both sides with plywood, and with the edges covered with matching plywood, will create a flush door that can be finished to correspond with fine interiors, will be massive in appearance yet light in weight, and will effectively resist fire. A door of this type has already passed the Fire Underwriters Labora tory tests for a "one-hour door," in dicating that it will withstand flames for one hour without being consumed and without permitting spread of the flames through the door. Use of such doors in hotels has been suggested. W hile the use of the new material in the building field is an obvious choice, die manufacturing industries will also be interested in the possi bilities o f a lightweight, fire-resistant insulation. The 11-lb. block has been taken up as a heat insulation for hightemperature service by industry, and the heavier material may be expected to fit into industrial production when its properties become more widely known. APRIL, 1 949 63