Wilbert Smith Archives Files Box 1131 19 1131-19-p205

Document Text (OCR)

3. The hardness was Rockwell B 9i,. he Ghenieal tpelvete Carbon 0,. Maganese 11.3 Sulphur 0.017 NI — MO — SI 0,12 FS Ferrous 88./,03. The chenical analysis does not correspond to any commercial manganese steels as they contain either more carbon and silicon or some nickel and molybdenum. The allow work hardened very heavily during the process of cutting which is inherent to such an alloy. The slipped lines were more pronounced once nital reagent was used. Since electropolishing was used in this...