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).
The difficulties of stelliting Silcrome steel and issues with valve steel.
| Identifier | ExFiles\Box 158\4\ scan0214 | |
| Date | 12th February 1938 | |
| - 3 - HPS.{Horace Percy Smith - Experimental Factory Mgr}1/VS.{J. Vickers}12.2.38. 6. STELLITING SILCROME. Silcrome does not stellite well, as it is a ferritic steel. It is subject to bad grain growth from the torch, and this cannot be corrected by subsequent heat treatment. We do not recommend stelliting any ferritic steel. It can be done with great care. We have not yet found any perfect valve steel, as there are too many qualities involved. Because of the dishing trouble we have experienced, all valves which we make from XCR or XB have crowned heads. HPS.{Horace Percy Smith - Experimental Factory Mgr} [Signature] | ||