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).
Micro-examination report on an 'N.M.C.' Austenitic Steel Brake Liner.
| Identifier | ExFiles\Box 141\1\ scan0085 | |
| Date | 18th December 1935 | |
| X1180 Micro-Examination Report. M1094. To Hs{Lord Ernest Hives - Chair}/Gry.{Shadwell Grylls} HL2/AG.18.12.35. Laboratory. E.{Mr Elliott - Chief Engineer} BY.{R.W. Bailey - Chief Engineer} [crossed out] "N.M.C." Austenitic Steel Brake Liner. As requested we have examined sections of the above cut from the same positions as the specimens from the Brico Cast Iron liner (Report M1080). As there is very little variation from point to point, we have taken only one photomicrograph, No. A1,346, X50. This, as before, shows the concave inner surface of the liner, filed flat and polished. The Brinell hardness was 207-212. We should not expect a uniform crystal structure of this type to be suitable for a friction surface, as it will probably have a tendency to drag and "glaze". This however, is surmise only, as we have not had any experience of Ferodo working against Austenitic steel. Photomicro-graph No. A1,346 att. Hl. HE. | ||