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).
Specifications and heat treatment instructions for Ford Steel suitable for gears.
| Identifier | ExFiles\Box 126\3\ scan0063 | |
| Date | 18th December 1936 | |
| Ford file 1065 FORD STEEL. Can be obtained from Samuel Fox, which is suitable for gears that are to be cyanided. Mr. Bolsover is the Chief Chemist. Grain structure to be held within a range of 6 to 8, preferably 4 to 5 McQuaid scale. Brinell. Normalised condition 220 for machine. 450 core, 850 surface hardness. AAAH. Ford Standard. Carbon .35-.38, Mn. .65-.80, Cr.{Mr Cra???ster / Mr Chichester} .90-1.10 Normalise 1650-1750 F.{Mr Friese} slow cool to get 220 brinell. Cyanide 45 mins at 820°C. Strain draw in oil 205°C don't exceed. | ||