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).
Laboratory report on the chemical analysis of an Aluminium-Copper-Antimony piston alloy.
| Identifier | ExFiles\Box 76\3\ scan0008 | |
| Date | 8th February 1917 | |
| War for Mr Hives & Mr Robotham RR. 864a. ROLLS-ROYCE, LIMITED. L 533 LABORATORY REPORT ON NON-FERROUS ALLOY. To... Mr Jardine Date... 8th Febry 1917 Re... Aluminium - Copper - Antimony piston alloy in the form of... Test bars sh. CHEMICAL ANALYSIS. no 1 no 2 Aluminium .. 86.3 % 86.4 % Copper .. .. 12.55 % 11.7 % Zinc .. .. 0.07 % Traces Tin .. .. .. .. % % Antimony .. .. 1.20 % 1.37 % Lead .. .. .. .. % % Iron .. .. .37 % .32 % Arsenic .. .. .. % % Nickel .. .. .. % % Silicon .. .. .30 % .33 % Phosphorus .. .. % % Sulphur .. .. .. % % Manganese .. .. % % TOTAL ESTIMATED .. 99.82 % 100.12 % Remarks, etc. With this are two microphotographs & a sheet of cooling curves. Analysis no 1 (above) is of metal cast in the foundry & apparently quite free from pores (half of test bar with this). The three test bars pulled in the cold gave Max Stresses of 10.4, 10.5 & 10.8 tons. The Yield points were ill defined at about 1 ton below Max Stress. Elong & Red Area were all about 1%. Bars are also being tested at 300°C. Microstructure similar to ordinary piston metal. Temp of Casting not known. No 2 was also free of pores microphotographs of it - cast at 640°C & 670°C show a good structure. | ||