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).
Specification number 215A for Cast Brass for general casting work.
| Identifier | ExFiles\Box 176\3\ img109 | |
| Date | 19th May 1919 | |
| COPY. ROLLS ROYCE LIMITED. 19th. May. 1919. SPECIFICATION NUMBER 215A. MATERIAL. CAST BRASS (for general casting work.) ANALYSIS. Copper .. .. .. .. .. .. 65.0 to 69.0% Zinc .. .. .. .. .. .. .. 30.0 to 34.0% Lead .. .. .. .. .. .. .. Maximum 1.2% Tin .. .. .. .. .. .. .. .5% Other impurities.. .. .. .. .3% TESTS. Test piece to be cast in sand 1.000 dia. and machined down to .564. (a) BRINELL : 55-72 (as sand cast.) (b) TENSILE : M.S. Y.P. E.{Mr Elliott - Chief Engineer} R.A. 15 tons, 11 tons, 15% 32% | ||