Stress-strain diagram for special cold drawn spring steel #12, showing tension and torsion curves.
| Identifier | ExFiles\Box 158\4\ scan0077 | |
| Date | 10th October 1936 guessed | |
| STRESS, THOUSAND LBS. PER SQ. INCH. INCHES ELONGATION TENSION CURVE STRESS, THOUSAND LBS. PER SQ. INCH. DEGREES TORQUE TORSION CURVE Figure 14. Stress-Strain Diagram for Special Cold Drawn Spring Steel #12. Ultimate strength 282,600 P.S.I. Tension Ultimate strength 216,000 P.S.I. Torsion Elastic Limit 174,000 P.S.I. Tension Elastic Limit 118,000 P.S.I. Torsion Elongation 8" - 1.6% 2" - 4.0% Reduction of Area 46.0%, Rockwell 50 1/2 - 51 1/2 C. | ||
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).