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).
Physical and mechanical properties of 'Hiduminium' R.R. 50 (D.T.D. 133.B).
| Identifier | ExFiles\Box 116\2\ scan0127 | |
| Date | 22th December 1939 guessed | |
| Physical and Mechanical Properties of “HIDUMINIUM” R.R. 50 (D.T.D. 133.B). SPECIFIC GRAVITY ... 2.73 CO-EFFICIENT OF THERMAL EXPANSION ... { 20-100°C ... 22.0 x 10⁻⁶ { 20-200°C ... 23.1 x 10⁻⁶ THERMAL CONDUCTIVITY IN C.G.S. UNITS ... 0.415 " " AS A PERCENTAGE OF COPPER ... 54 LINEAR CASTING CONTRACTION % ... 1.042 PATTERN MAKER'S SCALE ... 1/96 (FOR CASTINGS OF UNRESTRICTED SHRINKAGE) PROPERTIES OF TEST BARS. Condition. | 0.1% Proof Stress Tons per sq. in. | Ultimate Stress Tons per sq. in. | Elongation % on 2” | Brinell Hardness No. | Fatigue Limit Tons per sq. in. --- | --- | --- | --- | --- | --- SAND CAST—Heat Treated | 9.0—11.0 | 11.0—13.0 | 2—4 | 65—75 | ±4.5 DIE CAST—Heat Treated | 11.0—13.0 | 13.0—16.0 | 4—6 | 70—80 | ±5.8 TENSILE PROPERTIES OF SAMPLES CUT FROM HEAT TREATED SAND CASTING. (Test Pieces 1/50 sq. in. Cross Sectional Area) Position of Test Piece. | Yield Point Tons per sq. in. | Ult. Stress Tons per sq. in. | Elongation % on 2” | Brinell Hardness No. --- | --- | --- | --- | --- 1 | 11.0 | 13.0 | 5.0 | 72 2 | 11.5 | 13.0 | 5.0 | 72 3 | 10.5 | 14.5 | 5.0 | 72 4 | 9.0 | 13.0 | 8.0 | 72 5 | 10.0 | 14.0 | 7.0 | 72 6 | 9.5 | 14.0 | 5.0 | 72 | ||