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).
Laboratory report detailing the results of tensile tests on various steel types.
| Identifier | ExFiles\Box 154a\1\ scan0240 | |
| Date | 1st October 1931 | |
| To Rm{William Robotham - Chief Engineer} 81474. 1.10.31. Laboratory. TABLE OF TENSILE TESTS RESULTS. Steel. | Ult. Strength. | Yield Point. | Elong. % | Red. of Area % | Brinell --- | --- | --- | --- | --- | --- Mild S/M Steel. | 41.5 | 31.3 | 28.2 | 67.7 | 210 3½% Nickel S/N. | 56.6 63.8 | 45.9 58.9 | 25.3 19.8 | 59.0 53.6 | 257 296 5% C.H.N.S. S/ZN. | 56.0 | ---- | 21.2 | 53.4 | 249 Nickel Chrome S/NCR. | 66.9 | 61.6 | 20.3 | 59.3 | 309 Low Carbon ) Nickel Chrome for carburizing. S/ZNCR. | 72.5 91.9 | ---- ---- | 19.4 16.0 | 55.0 52.3 | 320 390 Hl. HE | ||