Abstract
The methods in vogue of testing structural steel, for its quality as well as for its adaptability for the purpose required, in commercial practice at the present time are briefly as follows: Tensile tests, in which the results compared in the crucial examination are the elastic limit and tensile strength per unit of area as well as the percentage of elongation in given lengths and percentage of reduction of area. Bending tests of the metal, both hot and cold and under varying conditions, such as quenching after being raised in temperature to a red heat, etc. Drifting tests, or the enlarging of holes punched or drilled in the metal, by pressure or blows upon a hardened steel drift pin.
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