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 Vickers Limited detailing the heat treatment process for spring steel.
| Identifier | ExFiles\Box 80\3\ scan0146 | |
| Date | 9th April 1913 | |
| +290. COPY 9th April 1913. Messrs Rolls-Royce Ltd., Nightingale Road, DERBY Dear Sirs, Your order No. T.T.491 As promised we are to-day forwarding the Spring Steel against the above order; the material should be treated in the usual manner, that is, heated evenly and carefully to a good red heat (1400 Fah) quenched in oil until cold and the temper afterwards drawn by re-heating to a black red when the springs should be again immersed in oil. We shall be glad to have your report in due course and are willing to treat a few of the springs if you so desire. Yours faithfully, Vickers Limited. (upside down text at bottom) R.R. 235A (100 B) (PP) (H) 724. 11.3.13) G 4204. | ||