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).
Tables of mechanical properties for Magnesium and Aluminium-Magnesium alloys after various heat treatments.
| Identifier | ExFiles\Box 142\2\ scan0494 | |
| Date | 15th March 1941 guessed | |
| Table 240 - page 1441. (Magnesium). Property. | Hot-rolled | Annealed 350° C. Tensile strength, tons per sq.in. | 15.7 | 14.3 Elongation per cent. on 2 in. | 12.5 | 7.0 Reduction in area per cent. | 19.0 | 9.0 Izod impact, ft.-lb. | 3.8 | 4.4 Brinell hardness. | 39 | 36 Table 243 - 1445 Mechanical Properties of Extruded and Heat-Treated Aluminium-Magnesium Alloys (Dumas & Rockaert) | | Heat-treated 2 hrs. at 420°C. Quenched in water | Heat-treated 2 hrs. at 420°C. quenched and tempered. 12 hrs. at 200° C. | | Aluminium per cent. | Ultimate stress tons per sq.in. | Elongation per cent. | Ultimate stress tons per sq.in. | Elongation per cent. | | 2.5 | 13.8 | 15.4 | 16.2 | 14.3 | | 4.5 | 18.1 | 13.4 | 17.2 | 12.5 | | 7.7 | 19.9 | 11.0 | 21.3 | 7.7 | | 9.0 | 22.5 | 10.4 | 25.7 | 1.8 | | 12.5 | 23.8 | 9.0 | 27.6 | 1.4 | | ||