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).
Optimal composition of valve steel with the addition of Tungsten and Chromium.
| Identifier | WestWitteringFiles\B\February1918\ Scan0 | |
| Date | 1st February 1918 | |
| To Mr. Hall from R.{Sir Henry Royce} c. to EH. c. to BJ. ORIGINAL R4/W1.2.18. 3 X.2574 Re - Valve Steel. From the reports received it would appear that valve steel would be better with sufficient Tungsten to make it stiff at high temperatures and sufficient chromium to prevent scaling. Will you let me know whether there is to be any alteration in our demand for steel for this purpose and whether you can find out if any Tungsten or Chromium is needed in the inlet valve. R.{Sir Henry Royce} [STAMP] D 4 FEB 1918 RECEIVED | ||