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 Steel #1, showing Torsion and Tension curves and material properties.
| Identifier | ExFiles\Box 158\4\ scan0067 | |
| Date | 10th October 1936 guessed | |
| STRESS, THOUSAND LBS. PER SQ. INCH DEGREES TORQUE TORSION CURVE STRESS, THOUSAND LBS. PER SQ. INCH. INCHES ELONGATION TENSION CURVE Figure 4 Stress-Strain Diagram for Steel #1 Ultimate strength 202,500 P.S.I. Tension 152,500 P.S.I. Torsion Elastic Limit 189 000 P.S.I. Tension 107,000 P.S.I. Torsion Elongation 8" - 3.5%, 2" - 7.02% Reduction of Area 50 %, Rockwell 40-42 C | ||