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).
Graph comparing the ultimate tensile strength of various cast iron alloys at high and ordinary temperatures.
| Identifier | ExFiles\Box 132\1\ scan0016 | |
| Date | 18th April 1927 guessed | |
| HIGH TEMPERATURE TENSILE TESTS ON CAST IRON SPECIMENS. ULTIMATE TENSILE STRENGTH TONS/☐" % MOLYBDENUM -o- MOLYBDENUM AT ORDINARY TEMPERATURES -x- MOLYBDENUM CHROMIUM AT ORDINARY TEMPERATURES -o- ALLOYED WITH MOLYBDENUM ONLY -x- ALLOYED WITH .23% CHROMIUM AND MOLYBDENUM | ||