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).
Letter from High Duty Alloys Ltd. providing material characteristics for Hiduminium and magnesium alloys.
| Identifier | ExFiles\Box 116\2\ scan0123 | |
| Date | 22th December 1939 | |
| 1020a HIGH DUTY ALLOYS LTD. TELEPHONE: SLOUGH 21201 (PRIVATE BRANCH EXCHANGE) TELEGRAMS: ALLOYS, SLOUGH. DIRECTORS: W. C. DEVEREUX, F.R.Ae.S., (Managing) DUNCAN McKELLAR BUCKINGHAM AVENUE, TRADING ESTATE, SLOUGH, BUCKS. [Logo: SBAC THE SOCIETY OF BRITISH AIRCRAFT CONSTRUCTORS] Our Ref JTR/WP. Your Ref RM.{William Robotham - Chief Engineer}12/MH.{M. Huckerby} Technical. 22nd December, 1939. W.A. Robotham, Esq., Messrs. Rolls-Royce Ltd., Nightingale Road, DERBY. Dear Sir, With reference to your letter to Mr. Devereux of the 11th, I have pleasure in enclosing you herewith a number of Data Sheets giving the full characteristics of both our casting and forging alloys. Our Hiduminium/R.R.56 Alloy in the form of tubes has an 0.1% Proof Stress of 22 tons per square inch, with an Ultimate Stress of 28 tons per square inch. Typical figures on forged magnesium alloy are as follows:- 0.1% Proof Stress: 12 to 14 tons per sq. inch. Ultimate Stress: 19 to 21 tons per sq. inch. Elongation: 8 to 12% I trust that this information will be of some assistance to you, and I shall be only too pleased to supply you with further details if you should consider it necessary. Yours faithfully, For and on behalf of HIGH DUTY ALLOYS LTD., [Signature] Technical Superintendent. | ||