The Strength and Weight of Aluminum.
The following interesting data concerning the strength and weight of aluminum are abstracted from a paper by E. Hunt, J. C. Langley and C. M. Hall read before a meeting of the American Institute of Mining Engineers :
Taking tensile strength of aluminum in relation to its weight, it is as strong as steel at 80,000 pounds ultimate strength.
Aluminum 97 to 99 per cent, silicon (graphitic) 0. 10 to one per cent, silicon combined 1.90 to 2.80, and iron from 0.40 to 0.20 per cent. The averages are as follows: