. Electric railway journal . d in case the piece is removed and usedagain, although this rarely happens. Keeping this second-hand stock sheet up to date andclosely scrutinizing it before ordering new pieces resultin a large saving of money as well as a great deal of timein case of an emergency. Welding Manganese Steel BY A WAY ENGINEER The article on a new process of welding manganesesteel by P. A. E. Armstrong in the Electric RailwayJournal for June 17 brings out some of the inherentdifficulties which must be overcome to make successfulautogenous welds on this metal. While a large per-centage
. Electric railway journal . d in case the piece is removed and usedagain, although this rarely happens. Keeping this second-hand stock sheet up to date andclosely scrutinizing it before ordering new pieces resultin a large saving of money as well as a great deal of timein case of an emergency. Welding Manganese Steel BY A WAY ENGINEER The article on a new process of welding manganesesteel by P. A. E. Armstrong in the Electric RailwayJournal for June 17 brings out some of the inherentdifficulties which must be overcome to make successfulautogenous welds on this metal. While a large per-centage of successes has attended repairs made by vari-ous welding outfits where extraordinary care was exer-cised, the lack of scientific information coupled withcareless workmanship, due largely to inexperience, hasresulted in a number of defective welds. There areusually two classes of defective welds, as mentioned inthe article; either a bond has not been obtained betweenthe welded metal and the old casting, or, where the cast-. FORM USED FOR RECORDING MISCELLANEOUS SPECIAL-WORK PIECES 28 ELECTRIC RAILWAY JOURNAL [Vol. XLVIII, No. 1 ing is subjected to heavy impacts, the manganese stee!surrounding the weld chatters. Since welds to heat-treated steel are regarded withdisfavor by metallurgists, particularly when the work isdone in the field, little or no scientific information hasbeen available, which will account for the large per-centage of successes. In order to obtain the best in-formation available on this subject a number of authori-ties were consulted and their suggestions are incor-porated in this article. Perhaps the paper by W. , president of the Alloy Steel Forging Company,Pittsburgh, Pa., in the April, 1915, Bulletin of theAmerican Institute of Mining Engineers, is as authori-tative as any available at this time. In this article presents data showing the relation of heat treat-ment to the tensile properties of rolled manganese result of the au
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