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).
Fatigue limit diagram for Silico-Manganese Steel #8.
| Identifier | ExFiles\Box 158\4\ scan0078 | |
| Date | 10th October 1936 guessed | |
| FINAL STRESS, THOUSAND LBS. PER SQ. INCH. INITIAL STRESS THOUSAND LBS. PER SQ. INCH. ENDURANCE LIMIT ELASTIC LIMIT NO. 2,3,4,BROKEN NO. 1,5,6,7,8,UNBROKEN Figure 15. Fatigue Limit Diagram for Silico-Manganese Steel #8. All stresses calculated by Wahl formula. | ||