From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
Letter from The Ethyl Export Corporation detailing the composition of a modified Monel metal used in French aero engines.
| Identifier | ExFiles\Box 96\2\ scan0068 | |
| Date | 30th September 1935 | |
| COPY+ The Ethyl Export Corporation, Thames House, Millbank, London, S.W.1. 30th September, 1935. W.A.Robotham Esq., Experimental Dept., Rolls-Royce Ltd., Nightingale Road, Derby. Dear Rm.{William Robotham - Chief Engineer}, With reference to the aluminium bronze seats in your Phantom 3 car, I think I promised you some details of a material which has been developed in France, and is used by Potez in their aero engines. This material is known as a modified Monel metal, but is really quite unlike the former. It is not, in my opinion, so satisfactory as high expansion nickel, chromium steel, but it seems to be better than aluminium bronze and works quite well in moderate duty aero engines. The general "make-up" is as follows :- Copper - 26% ± 1% Nickel - 60% ± 2% Silicon - 3.3 - 3.6 % Antimony - less than 1% Iron - less than 2% I believe the Brinell number of this material is around 300 to 340, and the co-efficient of expansion about 0.000019. With kind regards, Yours sincerely, FRB/BB. (Sgd.) F.R.Banks. | ||