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 toughness and brittleness of carbon and nickel steels used for axle tubes.
| Identifier | ExFiles\Box 102\4\ scan0071 | |
| Date | 22th May 1931 | |
| - 2 - In the case of the 40/50 HP. similar dimensions are 3.11/16" and 2½". b/- The difficulty experienced in using carbon steel for axle tube work is to maintain consistent izod figures, which represent its toughness and also its tendency if any to notch brittleness. The variations in izod figures for the same specification made by two different makers have been as much as between 10 to 20 ft. lbs. from one maker and 40 ft. lbs. from another; the improvement in izod being obtained in the better steel by improved methods ensure a cleaner steel i.e. one in which slag inclusions have been reduced to a minimum. Our nickel steel falls invariably between 50 and 60 ft. lbs. from actual tests made on tubes at intervals BY.{R.W. Bailey - Chief Engineer} | ||