Number and nature of tests
74.  Tests need not be made from unimportant steel castings or from steel castings which are used for articles usually made of cast-iron, if the scantlings are not materially reduced below what would be required if cast-iron were used. All other steel castings shall be tested as follows:
(a)at least one tensile and one bending test shall be made from the castings from each charge; and, where a casting is made from more than one charge, at least 4 tensile and 4 bending tests shall be made from pieces cast as far apart as possible on the casting and as near the top and the bottom respectively as practicable;
(b)where more than one casting is made from one charge, at least one tensile and one bending test shall be made from the castings run from one common pouring head; but separate tests shall be made from each casting or set of castings run from each separate pouring head. Small castings may, however, be dealt with in accordance with rule 48(6); and
(c)the test-pieces shall be selected after all annealing has been completed.