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).
Adopting hykro steel for crankshafts and its suitability for Nitrogen Hardening.
| Identifier | ExFiles\Box 146\1\ scan0124 | |
| Date | 6th December 1937 | |
| W/P. Sr. from Rm.{William Robotham - Chief Engineer} 1245 Rm{William Robotham - Chief Engineer}9/R.6.12.37. Many thanks for your notes on Nitrogen Hardening. We are just about to adopt hykro steel for crankshafts. We attach a specification of this steel, and shall be glad to have the comments of Messrs. Aubert & Duval upon it relative to its suitability for Nitrogen Hardening. Rm.{William Robotham - Chief Engineer} | ||