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).
The continued chemical analysis and conclusions regarding the properties and heat treatment of a steel specimen.
| Identifier | ExFiles\Box 52\2\ Scan004 | |
| Date | 24th October 1921 guessed | |
| ANALYSIS--Continued. Sulphur - - - - % Phosphorus. - - - - % Arsenic - - - - % Tungsten - - - - % Titanium - - - - % Molybdenum - - - - % Copper - - - - % Zinc - - - - % Antimony - - - - % Tin - - - - % Magnesium - - - - % Iron - - - - % Lead - - - - % Aluminium - - - - % CONCLUSIONS. The specimens examined under low and high power indicated a high quality material free from slag or other inclusions. As received the bars appeared to have been heavily annealed with a resultant coarse grain but as shown in the attached test report this did not indicate any mechanical weakness. Steel of the analysis given would probably stand a skin carburizing without developing serious brittleness, but the time of carburizing should not exceed about 1 hour at 900°C. Hl. | ||