Regulation 50

The test-pieces sheared from plates, angle bars and tee bars, for bending tests, shall not be less than 1½ inches wide; but for small bars, the whole section may be used.The rough edge caused by shearing samples ½ inch in thickness and above may be removed by filing or grinding; and samples 1 inch or more in thickness may have the edges machined but the test-pieces shall receive no other preparation.

The bending test-pieces of round bars shall, whenever practicable, be of the full diameter of the bars, as rolled, but those of large section may be machined to a diameter of 2 inches.

The bending tests of forgings and castings shall be made with rectangular test-pieces, 1 inch wide by 3/4 inch thick, which shall be machined to size and have the corners rounded to a radius of 1/16 inch; they shall be bent over their thinner section.

The test-pieces used for temper bending tests shall be similar to those used for cold bending tests.