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).
Microscopic analysis details for a Chromidium Cast Iron sample.
| Identifier | ExFiles\Box 120\1\ scan0325 | |
| Date | 11th January 1936 | |
| 12 CENTRAL WORKS CHROMIDIUM CAST IRON. Micro No: 571. Date cast 11/1/36. Brinell Thickness of Braking section. 12 M/ms. Magnification 700 dias: Etched in Picric Acid. Magnification 200 dias: Etched in Picric Acid. | ||