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).
Specification for Barrel Forgings, including the chemical composition for 'vibrac' steel.
| Identifier | ExFiles\Box 176\3\ img100 | |
| Date | 26th June 1940 | |
| Rm.{William Robotham - Chief Engineer} c. Ve. c. HPS.{Horace Percy Smith - Experimental Factory Mgr} c. HS.{Lord Ernest Hives - Chair} Barrel Forgings. Confirming your instructions of yesterday and further to our conversation with HPS.{Horace Percy Smith - Experimental Factory Mgr} and Ve/NP we have to-day requested Mr. Burton of English Steel Corporation Ltd. to put in hand 30 Barrels to the following specification - (1) Material. The material will be "vibrac" steel of the following approximate composition:- Carbon 0.28 to 0.32% Silicon Max. 0.30% Manganese 0.6 to 0.7% Sulphur Max. 0.04% Phosphorous Max. 0.04% Nickel 2.4 to 2.7% Chromium 0.6 to 0.7% Molybdenum 0.6 to 0.65% Steel to be produced by Acid open hearth melting. Continued Overleaf.... | ||