from the blooming passes
Half ingot, cross-section slice, 3A2. Smooth finished, unetched, location of surface from top of ingot 2″.8; 4.5% by distance; 4.1% by volume. About 1/2 size.
(only slightly cropped)
ex Report of the Tests of Metals and Other Materials for Industrial Purposes. Made with the United States Testing Machine at Watertown Arsenal, Massachusetts, during the Fiscal Year ended June 30, 1909 (1910)
Cornell copy, digitized December 6, 2011
from letter of transmission —
“This report deals largely with the investigation of steel-rail ingots and derivative shapes. Beginning with the ingot, the structural state of the steel was examined by taking cross sections and longitudinal sections. This method was carried through the various successive derivative shapes, and the results obtained are shown in the large number of illustrations which form the body of the report. The illustrations are so arranged as to show the progressive changes in the character of the metal from its initial state in the ingot to its final condition in the finished product. Tensile test bars were taken at the successive stages of rolling, from the blooming passes to the rail mill...”
bloom; iron; steel; Watertown Arsenal