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).
Letter to Ricardo & Co. detailing the composition and properties of the AC.9 aluminium-tin bearing material.
| Identifier | ExFiles\Box 115\5\ scan0037 | |
| Date | 23th May 1938 | |
| 1020a wellworthy file. BUY 272 Agents Copy Hellehayo FB/WHF. 65261 ATE/S/67371. 23rd May, 1938. Messrs. Ricardo & Co, (1927) Ltd., Bridge Works, Shoreham-by-Sea, SUSSEX. Dear Sirs, Attention of Major A.{Mr Adams} T. Evans. We regret that the information promised on the occasions of the writer's recent visit to your Works was not forwarded to you regarding RR. Aluminium-tin bearing material, owing to the writer's continued absence from the Works in various parts of the country, but we hasten to forward this to you as promised. At the time of our discussion AC.6. material had been not only experimented with, but had proved satisfactory in service, but there were certain difficulties in the course of manufacture, principally in casting, which has necessitated a slight change, and the AC.6. has now been superseded by AC.9. Particulars of this material and approximate composition is as follows - Tin Nickel Cu. Manganese Magnesium Silicon Iron 5.2-6.0 1.5-1.8 0.9 0.7-1.0 0.2-0.4 0.2-0.4 The maximum Brinell is about 65, the general figure being about 50 to 65 Brinell. The specific gravity is about 2.95 to 3.00 The co-efficient of expansion 0°C. to 150°C. (.0000225). The heat conductivity about 37 c.g.s. units which is three times that of steel, and five times that of normal Babbit. The anti-corrosion properties | ||