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).
Performance and testing of Silchrome valve steel for all engines.
| Identifier | ExFiles\Box 54\3\ Scan214 | |
| Date | 29th December 1927 | |
| HL. BY.{R.W. Bailey - Chief Engineer} Hs.{Lord Ernest Hives - Chair} RG.{Mr Rowledge} E.{Mr Elliott - Chief Engineer} FROM R.{Sir Henry Royce} X4634 R2/M29.12.27. c. to BJ. Wor.{Arthur Wormald - General Works Manager} VALVE STEEL (SILCHROME) X.4095 ALL ENGINES. X.4634 X.4587 Since I understand that we are having very good service from the above it would be dangerous to go to the high nickel soft alloy, or any other steel, without very long duration tests. Naturally we should examine and watch others, whether their results are good or bad. For instance, the Stutz seems particularly bad. It has occurred to me that we ought to Izod & Stantan test pieces from valves that have been long in heavy service. Possibly we ought to examine steel of even lower silicon than 3.35, and find how near we are to the boundary line: I mean, test for erosion, pitting, valve stem wear, etc, as well as reliable mechanical qualities hot and cold. This is one of the vital points of enormous importance. R.{Sir Henry Royce} | ||