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).
Data sheet for 'Hiduminium' R.R. 59 (L42) wrought alloy for parts working at elevated temperatures.
| Identifier | ExFiles\Box 116\2\ scan0130 | |
| Date | 22th December 1939 guessed | |
| Data Sheet No. 35 “HIDUMINIUM” R.R. 59 (L42) Wrought Alloy for Parts Working at Elevated Temperatures The modern demand for increased power for a given capacity in internal combustion engines has brought with it great increases in cylinder temperatures and stresses, hence the demand for stronger and more reliable piston material. This trend has been most marked in the case of the high performance aero-engine where wrought piston materials have been used almost exclusively for some years, while recent development of the compression ignition engine has shown the necessity for forged aluminium alloy pistons. Piston forgings in “HIDUMINIUM” R.R.59 possess a very high degree of homogeneity. They have great strength and resistance to static and dynamic stresses both at normal and at elevated temperatures, and the combination of these characteristics, together with favourable thermal conductivity and expansion co-efficients, results in reliable piston material for arduous service. This alloy, which is also used extensively for other parts subjected to high engine temperatures such as cylinders, cylinder heads, etc., can be supplied in the form of die stampings, pressings, or hand forgings, its heat treatment consisting of a solution treatment of 2—4 hours at 530° ± 5° C., followed by quenching and an ageing or precipitation treatment of 16—20 hours at 170° ± 5° C. HIGH DUTY ALLOYS LTD. SLOUGH Telephone : SLOUGH 822/3 Telegrams : “ALLOYS, SLOUGH” P.T.O. | ||