Abstract
WHEN King Edward, as Prince of Wales, visited the Hecla Works of Hadfields, Ltd., some years ago, he cast a medallion portrait of himself in manganese steel. A similar medallion, 20 inches in diameter, was recently cast showing the head and shoulders of General the Right Hon. J. C. Smuts, P.O., and both are now on view at the Johannesburg Empire Exhibition, of which General Smuts is honorary president. The manganese steel of which these medallions are made is run into the moulds at a temperature of about 1,450° C., but despite this high temperature, and owing to the specially developed moulding sand employed, the definition of the featiires is remarkable, each detail being reproduced as clearly as in a photograph.
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Medallions of Manganese Steel. Nature 138, 755 (1936). https://doi.org/10.1038/138755b0
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DOI: https://doi.org/10.1038/138755b0