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).
Mechanical test results for Nitralloy steel and Nickel case hardening steels to specifications 2072 and 2073.
| Identifier | ExFiles\Box 63\4\ scan0132 | |
| Date | 25th September 1930 guessed | |
| -4- PREVIOUS MECHANICAL TESTS ON NITRALLOY STEEL AND NICKEL CASE HARDENING STEELS TO SPECIFICATIONS NOS. 2072 AND 2073. Nitralloy crankshaft forgings from Messrs. Firth-Derihon. Crankshaft No. Ult.Str. Y.P. Elong. R.A. Stanton. Brinell. XG.3300 65.4 59.2 20.0 57.4 8172 302 XG.3351 64.4 58.4 20.0 57.6 6104 293 XG.3311 64.8 59.6 21.5 59.3 7676 302 Upton-Lewis Tests. Crankshaft No. No. of Cycles. Average height of diagram. Brinell. XG.3300 430 2.7 cms. 302 XG.3351 422 2.7 cms. 293 XG.3311 440 2.8 cms. 302 The following are the results of tests on Nitralloy bar material supplied and nitrided by Messrs. Firth-Derihon. The test bars were fully machined before the nitriding operation so that the case-hardened surface was included in the tests. Upton-Lewis tests. Test Bar No. No. of Cycles Average height of diagram. Brinell. FD.{Frank Dodd - Bodies} 8 140 3.0 cms. 269 FD.{Frank Dodd - Bodies} 9 165 2.80 cms. 269 FD.{Frank Dodd - Bodies} 10 145 2.95 cms. 269 FD.{Frank Dodd - Bodies} 11 123 2.90 cms. 269 Test Bar No. Stanton Test. FD.{Frank Dodd - Bodies} 13 6,181 FD.{Frank Dodd - Bodies} 14 6,471 FD.{Frank Dodd - Bodies} 15 6,183 FD.{Frank Dodd - Bodies} 16 6,274 Contd. | ||