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 to Messrs. Aubert & Duval Ltd. confirming receipt of steel samples and asking about the necessity of grinding after nitro hardening.
| Identifier | ExFiles\Box 154a\1\ scan0136 | |
| Date | 28th January 1929 | |
| HH469 28th. Jan. 1929. Hs{Lord Ernest Hives - Chair}/Rnl/LG. Messrs. Aubert & Duval Ltd., 62, Avenue De La{L. A. Archer} Republique, Paris. Dear Sirs, We have received the samples mentioned in your letter of the 8th. inst. and are at once proceeding to test them. We thank you for supplying us with these pieces. Yours faithfully, P.S. There is one point upon which we are not quite clear. Do you consider that it is necessary to grind the surface of your steels after nitro hardening in order to remove the brittle layer which is inclined to flake off? Perhaps some of your steels have not this brittle layer. We should of course prefer in all cases to avoid this final grinding. Hs{Lord Ernest Hives - Chair}/Rm.{William Robotham - Chief Engineer} | ||