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The Iron Age 1928-05-03: Vol 121 Iss 18

1928 Reed Business Information US

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THE IRON New York, May 1928 ESTABLISHED 1855 VOL. 121, No. Anneal Each Heat Independently Close Control Features New Practice Malleable Plant—Ovens Charged Through the Top— Handling Devices Save Labor Costs BURNHAM FINNEY* long-established practice—has been abandoned the Southern Malleable Iron Co., East St. Louis, which has installed system single-heat annealing. strict adherence definite heat-treat- ing schedules the company has never had anneal run under 98.5 per cent, nor has produced over-annealed castings. Since malleable castings should show some combined carbon evidence that they have not been over-an- NNEALING malleable castings mixed heats— *Resident editor Cincinnati for IRON AGE. nealed, the percentage anneal determined the amount combined carbon the malleable test bar. close control the temperature during the anneal- ing process, the normal maximum 2.7 per cent combined carbon has been reduced average trace little 0.03 per cent. The annealing cycle for the castings from each heat scheduled after analysis the iron has been made. Consequently, the heat treatment made vary according the requirements necessary pro- duce perfect anneal. Obviously, castings from two Annealin…

Citation

The Iron Age 1928-05-03: Vol 121 Iss 18. Reed Business Information US. 1928.