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).
Table of alloy test results showing Stanton Test figures, Specific Gravity, and Hardness Test values.
| Identifier | ExFiles\Box 37\4\ scan 136 | |
| Date | 9th August 1917 | |
| (2) No. Designation. Stanton Test figure Specific Gravity. Hardness Test. 1. P1 53 3.01 85 2. P2 237 Not yet obtained 2.88 62 3. C 1127 3.00 60 4. M1 6254 3.05 79 5. L 878 2.79 Not yet obtained 43 6. H 1780 2.72 54 7. A Not yet obtained 2.90 Not yet obtained 80 8. M2 92† 3.10 79 We have also obtained specific gravity Brinell test results for some of these alloys and the results are given in the above table. + This is the only Stanton figure not previously reported to Mr. Royce. EFC. | ||