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 Midland Motor Cylinder Co Ltd providing material specifications for 'CHROMIDIUM' Iron.
| Identifier | ExFiles\Box 142\4\ scan0156 | |
| Date | 21th January 1936 | |
| x1203. The MIDLAND MOTOR CYLINDER CO LTD. Telegrams RAFWORK, SMETHWICK Telephone 1151-2-3 SMETHWICK Birmid Works, Smethwick Near Birmingham ECT/KR. Messrs. Rolls Royce, Ltd. Experimental Department, DERBY. 21st January 1936 Your reference Hs{Lord Ernest Hives - Chair}/AFM.{Anthony F. Martindale}20/KW. Dear Sirs, Further to our communication, dated the 18th, reference HH/LS, we have pleasure in giving below the particulars you ask for regarding "CHROMIDIUM" Iron. Young's Modulus 13.5 x 10-6 lbs. per sq. inch. Co-efficient of Thermal expansion 1.25 x 10-5 inches per inch./°C. Co-efficient of Thermal Conductivity .12 at normal temperature, falling to .11 at 350°C. Specific Heat. from .11 at 100°C rising to .14 at 350°C. Brinell figure. 200-230. We trust these figures will supply sufficient information for your requirements, but if any further particulars are required, we shall be only too pleased to supply them. We are also enclosing two micro-photographs, shewing the uniformity of structure with various sections of casting, and a booklet giving general | ||