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 High Manganese Steel #13, detailing tension and torsion curves.
| Identifier | ExFiles\Box 158\4\ scan0083 | |
| Date | 14th October 1936 guessed | |
| STRESS, THOUSAND LBS. PER SQ. INCH. TENSION CURVE INCHES ELONGATION TORSION CURVE DEGREES TORQUE Figure 20. Stress-Strain Diagram for High Manganese Steel #13. Ultimate strength 204,000 P.S.I. Tension Ultimate strength 163,000 P.S.I. Torsion Elastic Limit 150,000 P.S.I. Tension Elastic Limit 105,000 P.S.I. Torsion Elongation 8" 5.5%, 2"—7.8% Reduction of Area 45.7% Rockwell 43-44 C | ||