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 a supplier offering a new type of case-hardening steel with details on its purity, physical properties, and price.
| Identifier | ExFiles\Box 49\1\ Scan047 | |
| Date | 30th October 1918 | |
| X3414 COPY. Ashton Road, Openshaw, Manchester. 30.10.18. Messrs. Rolls-Royce Ltd. Derby. Dear Sirs, CASE-HARDENING STEELS. We beg to advise you that we have recently placed upon the market a Case Hardening Steel of unusual purity and uniformity. The Sulphur and Phosphorous contents are only .010% and .006% as compared with .05 to .06% of the general run of case hardening steels. Physical tests are as follows:- Tensile 28.5 tons. Elastic limit 17 Elongation in 2" 39.5% Reduction of area 61% The price of this high grade steel is £35 per ton and we can, at this moment, commence delivery of standard sizes in 7 days. Yours faithfully, for Sir. W.G. Armstrong, Whitworth & Co. Walter Todd. R.R. 235A. (500 T) (S.D.) 408. 26-4-17. (Bm.) 2/158/13. | ||