Wilbert Smith Archives Files Box 1131 19 1131-19-p059

Document Text (OCR)

1, Layers of magnetic and non-magnetic metal were found in the piece. Both layers proved to be steels. 2. The magnetic metal had a composition similar to specification AISI 50B20, a 0.2% carbon steel with a small amount of chromium and containing boron. 3. The non-magnetic metal was an austenitic manganese steel containing less than one per cent of chromium. Similar steels are produced in the Province of Quebec. 4, The microstructures of both steels were typical of those found in cast metals....