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).
Comparison between material specification requirements and laboratory test results for 'Asbestosteel'.
| Identifier | ExFiles\Box 140\3\ scan0043 | |
| Date | 20th April 1937 guessed | |
| No.1. SPECIFICATION REQUIREMENTS. LABORATORY TEST REPORT ON ROBERTS' "ASBESTOSTEEL." Composition. Cold Rolled Steel 50% +- 4% Asbestos & Binder 50% +- 4% Steel - 51% Asbestos & Binder - 49% Weight. 12 to 14 oz. per sq. ft. 13.9 oz. per sq. ft. Steel Analysis. Carbon .06 to .10% Mang. .30 to .40% Phos. .08 to .10% Carbon - .08% Mang. - .34% Phos. - .07% Asbestos. The asbestos must be a good grade of millboard properly treated and impregnated to render it suitable for use when in contact with water, oil or petrol. Quality O.K. Loss on ignition. The loss on ignition of the asbestos & binder shall not exceed 40% at 1500°F, time 20 minutes. Loss on ignition of 20 minutes at 1500°F - 32% Absorption. Petrol. On soaking a piece 2" square in petrol at 75°F.{Mr Friese} for 24 hours the weight increase shall not be greater than 15.0%. Blot off surplus Oil. On soaking a piece 2" sq. in machine oil at 75°F.{Mr Friese} for 24 hours the weight increase shall not exceed 15%. Blot off surplus. Water. On soaking a piece 2" square in water at 75°F.{Mr Friese} for 24 hours the weight increase shall not exceed 15% of original weight of sample. Blot off surplus. Absorption. Petrol. - 6.2% Oil. - 6.7% Water. - 11.4% Boiling Test. After immersion in boiling water for 2 hours the material shall be firm and not spongy and the asbestos shall not separate readily from the steel centre or be rubbed off easily. Condition after two hours in boiling water satisfactory. | ||