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).
The composition, properties, and manufacturing procedure for Clyde Alloy Steel used in gears.
| Identifier | ExFiles\Box 136\1\ scan0198 | |
| Date | 19th January 1937 guessed | |
| Humber Gears Single Quench Steel Clyde Alloy Steel Ref. H.R.M. 3 S.1217A S 80 tsi C .35 Mn .5 Cr{Mr Cra???ster / Mr Chichester} 1.1 Ni 2.1 Mb .35 Ult 110-120 Elong 12% Red 30% (min) Izod 12. Normalising temp. v.{VIENNA} important. Shaving - Red Ring American Broach Co Rock Shaver - Michigan Tool Co. Not suitable for shouldered gears. Manufacturing Procedure. Semi finish on Fellows or Maxicut. Shave. Cyanide. Lap. Go to Stock. re-lap if necessary. | ||