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).
Laboratory report detailing the chemical analysis of a steel sample from a Mercedes valve guide.
| Identifier | ExFiles\Box 22\5\ Scan107 | |
| Date | 29th September 1916 | |
| X. 1748 Mr Clark. Sept dept X.407 RR. 864. ROLLS-ROYCE, LIMITED. L114 LABORATORY REPORT ON SAMPLE OF STEEL. To... Mr Maden Date... 29/ Sept 1916 Re... Valve guides of S.P. Mercedes in Iron steel in the form of... part marked... received at works on... received by laboratory on... 28th Sept from Test Departt CHEMICAL ANALYSIS. Carbon .. .. .. .. .. .. .. 3.47 % { of which 3.05 was Graphite Nickel .. .. .. .. .. .. .. - % Chromium .. .. .. .. .. .. .. - % Vanadium .. .. .. .. .. .. .. - % Tungsten .. .. .. .. .. .. .. - % Manganese .. .. .. .. .. .. .. .41 % Silicon .. .. .. .. .. .. .. 1.62 % Sulphur .. .. .. .. .. .. .. .10 % Phosphorus .. .. .. .. .. .. .. .52 % Remarks, etc. This material is reported as better in practice than bars or phosphor bronze. Since it is subject to heating, if made of Cast Iron as above, the metal should not contain more than 1.7% Silicon & between 0.40 & 1.0% Manganese & phosphorus below 0.50%. (minimised tendency to swelling & disintegration) Signature... JCSD | ||