The substitution of Ubas steel with a low carbon case hardening mild steel for chassis parts.
| Identifier | ExFiles\Box 158\4\ scan0113 | |
| Date | 22th December 1936 | |
| ROYCE C.R. C.Rm. {William Robotham - Chief Engineer} C.HDG. 1360 BY {R.W. Bailey - Chief Engineer} /EM.7/J.22.12.36. LOW CARBON CASE HARDENING MILD STEEL TO SPEC.226. ------------------------------------------------ We understand that the Design Dept. are still interested in the possibility of using a low carbon case hardening mild steel for certain of the chassis parts and our previous experience with the Ubas material, indicates that this is not of a sufficiently good quality for our use as several previous attempts to use the Ubas material have failed on account of the dirty nature of the steel. We have discussed this matter with Messrs. Samuel Fox & Co, Limited, who are prepared to make this steel to the above specification which they will melt in the high frequency electric furnace and we think this ought to be free from the troubles which have been associated with the Ubas Steel. We attach hereto for yourinformation, two letters received from Messrs. Samuel Fox Limited, in which they state that they are prepared to make electrically melted steel at 25/- per hundredweight and they propose to put in hand a trial cast. They ask that we would let them know the sizes of bar we should require for camshafts for trial purposes and we shall be glad if you will let them know the sizes required for P.III and Bentley Chassis and at the same time place an order for six trial camshaft bars to each size. We are of the opinion that the use of the term Ubas should now be discontinued and in place of same we should refer to low carbon case hardening mild steel to R.R.Specification No.226. BY {R.W. Bailey - Chief Engineer} /EM [Signature] | ||
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).