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 a non-ferrous alloy from a broken piston.
| Identifier | ExFiles\Box 76\3\ scan0042 | |
| Date | 18th March 1918 | |
| RR. 864a. ROLLS-ROYCE, LIMITED. L 679 LABORATORY REPORT ON NON-FERROUS ALLOY. To: Experimental, Test, & Works. Date: 18 . 3 . 1918 Re: Piston that broke on test 17.3.18 in the form of: piece of same laboratory on: 18.3.18 CHEMICAL ANALYSIS. Aluminium: .. .. .. .. % Copper: .. .. 3.68 % Zinc: .. .. 1.4 % Tin: .. .. .15 % Antimony: .. .. .. .. % Lead: .. .. .. .. % Iron: .. .. .68 % Arsenic: .. .. .. .. % Nickel: .. .. .. .. % Silicon: .. .. .37 % Phosphorus: .. .. .. .. % Sulphur: .. .. .. .. % Manganese: .. .. .35 % Oxide of Aluminium: .15 % Magnesium: TOTAL ESTIMATED .32 % Remarks, etc. This is obviously far too low in copper. It is high in zinc, iron, manganese, & magnesium. The tensile strength + Y.P. would not be as high as our ordinary piston metal. Signature: HCSd | ||