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).
Tempering graph of Vibrac Steel V. 30.
| Identifier | ExFiles\Box 176\3\ img099 | |
| Date | 26th June 1940 guessed | |
| TEMPERING GRAPH OF VIBRAC STEEL V.{VIENNA} 30 Gru file DIA. OF BAR: 1" HARDENING TEMPERATURE: 830°C QUENCHING MEDIUM: OIL COOLED, AFTER TEMPERING IN AIR. Y-AXIS: TONS PER SQUARE INCH - PERCENTAGES - FOOT POUNDS - BRINELL IN UNITS OF TEN. X-AXIS: REHEATING TEMPERATURE - DEGREES CENTIGRADE CURVE LABELS: MAXIMUM STRESS, YIELD POINT, BRINELL, REDUCTION IN AREA %, IZOD IMPACT, ELONGATION % BOTTOM NOTE: ACTUAL REHEATING TEMPERATURES OF TEST SAMPLES INDICATED BY * * | ||