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 risks of increasing the tensile strength of 3½% nickel steel.
| Identifier | ExFiles\Box 154a\1\ scan0248 | |
| Date | 10th February 1932 | |
| - 2 - BY.4/G.10.2.32. would re-adjust itself to the new conditions without fear of failure. If we were to attempt to increase the tensile strength of our standard 3½% nickel steel beyond the figure quoted, there would undoubtedly be a definite risk involved owing to the drop in reduction in area which would take place if the tensile were increased to say 20%. This fall in the reduction in area would certainly represent a serious danger, and is a feature which we could not entertain. BY.{R.W. Bailey - Chief Engineer} By | ||