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 Sir W.G. Armstrong, Whitworth & Co. Ltd. regarding a sample of E.M.C.H case-hardening steel.
| Identifier | ExFiles\Box 49\1\ Scan048 | |
| Date | 4th November 1918 | |
| X.3414 COPY. Ashton Road, Openshaw, Manchester. 4.11.18. Messrs. Rolls-Royce, Ltd. Derby. Dear Sirs, "E.M.C.H" CASE-HARDENING STEEL. In reply to your letter of the 31st. ult. We have requested our Openshaw Works to send you a sample of the above named steel, for test, and would be glad to receive your comments after you have experimented with same. The steel contains Carbon 0.12% Sulphur 0.010%, and Phosphorous 0.006%, and is manufactured with sufficient care to guarantee absolute uniformity. Yours faithfully, for Sir W.G. Armstrong, Whitworth & Co. Ltd. (Sgd.) Walter Todd. District Representative. | ||