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).
Comparison of tensile properties for different steels at temperatures ranging from 700°C to 900°C.
| Identifier | ExFiles\Box 154a\1\ scan0074 | |
| Date | 8th June 1928 | |
| - 2 - than the high nickel chrome tungsten type since the latter has in every instance a much higher maximum tensile, and a considerably lower elongation and reduction in area for each of the temperatures quoted :- 1/- AT 700°C Max. Tensile Elongation Red. in Area Tons % % S.L.V. 10.08 61.5 95.0 H.R.Crown 28.20 28.00 61.0 K.E.High 33.8 Not Not Nic.Chrome recorded. recorded. 2/- AT 800°C S.L.V. 4.87 60.3 97.0 H.R. Crown 17.2 40.0 74.0 3/- AT 850°C K.E. High 19.4 30.0 72.0 Nic. Chrome. 4/- AT 900°C S.L.V. 2.82 88.0 97.0 H.R.Crown 6.02 70.0 81.0 K.E.High 15.0 28.0 72.0 Nic. Chrome. As a further comparison below are given the figures for the izod tests for the two steels covering temperatures from 700° to 900°C inclusive, and here again the high ductility of the S.L.V. against the high nickel chrome steel is again very much in evidence, the high resistance of the S.L.V. being undoubtedly due to its increased ductility or capacity to flow:- | ||