Summary

Various Transactions of the American Society of Civil Engineers…

Some roads have prescribed the limits of deflection to be allowed under the drop test. With our present knowledge, we believe that we should fix a minimum deflection to eliminate brittle rails and to secure greater uniformity of product; also maximum deflection to eliminate soft rails. We are not able at the present time to fix these limits, but our ultimate object will be to determine and fix such limits for the specifications.
Source: Gutenberg

Various Transactions of the American Society of Civil Engineers…

Two pieces shall be tested from each heat of steel. If either of these test pieces breaks, a third piece shall be tested. If two of the test pieces break without showing physical defect, all rails of the heat will be rejected absolutely. If two of the test pieces do not break, all rails of the heat will be accepted as No. 1 or No. 2 classification (according as the deflection is less or more, respectively, than the prescribed limit [F] ) .
" (B) If, however, any test piece broken under test A shows physical defect, the top rail from each ingot of that heat shall be rejected.
Source: Gutenberg

Various Transactions of the American Society of Civil Engineers…

When the average phosphorus content of the ingot metal used in the Bessemer Process at any mill is below 0.08 and in the Open-Hearth Process is below 0.03, the carbon shall be increased at the rate of 0.035 for each 0.01 that the phosphorus content of the ingot metal used averages below 0.08 for Bessemer steel, or 0.03 for Open-Hearth steel.
"The percentage of carbon in an entire order of rails shall average as high as the mean percentage between the upper and lower limits.
Source: Gutenberg

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