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).
Stress-Strain diagram for Silico-Manganese Steel #8, showing tension and torsion curves.
| Identifier | ExFiles\Box 158\4\ scan0079 | |
| Date | 10th October 1936 guessed | |
| STRESS, THOUSAND LBS. PER SQ. INCH. INCHES ELONGATION TENSION CURVE DEGREES TORQUE TORSION CURVE Figure 16. Stress-Strain Diagram for Silico-Manganese Steel #8. Ultimate strength 190,000 P.S.I. Tension Ultimate strength 168,000 P.S.I. Torsion Elastic Limit 157,000 P.S.I. Tension Elastic Limit 100,000 P.S.I. Torsion Elongation 8" 4.7%, 2"-7.8% Reduction of Area 50.5%, Rockwell 43-44 C. | ||