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).
Chemical analysis report for six road springs marked 1, 2, 3, 4, 5, and 6.
| Identifier | ExFiles\Box 54\3\ Scan143 | |
| Date | 9th September 1924 guessed | |
| Hs.{Lord Ernest Hives - Chair} H11/EF19924. X2628 Laboratory. Re 6 Road Springs marked 1,2,3,4,5, and 6. Analyses:- 1. 2. 3. Carbon 0.53% 0.50% 0.40% Manganese 0.54% 0.56% 0.54% Chromium 1.08% 1.06% 1.02% Silicon 1.05% 0.82% 0.72% Sulphur --- --- --- Phosphorus 0.030% 0.042% 0.047% 4. 5. 6. Carbon 0.47% 0.40% 0.55% Manganese 0.58% 0.37% 0.56% Chromium 0.81% 0.97% 1.00% Silicon 0.94% 1.00% 0.65% Sulphur 0.023% 0.030% 0.030% Phosphorus 0.032% 0.030% 0.027% Some of these springs are slightly higher in Manganese and Chromium than usual, otherwise they are normal. Hl. JHE | ||