MATERIALS AND WORKMANSHIP 



45 



shall have both faces rolled and both edges milled to 

 the form shown by Fig. 3; or with both edges parallel; 

 or they may be turned to a diameter of J in. for a length 

 of at least 9 in. with enlarged ends. 



(b) Rivets: Rivet rods shall be tested as rolled. 



(c) Pins and Rollers : Specimens shall be cut from the finished 



rolled or forged bar, in such a manner that the center 

 of the specimen shall be 1 in. from the surface of the 

 bar. The specimen for tensile test shall be turned to 



_1_ 



FIG. 4. 



the form shown in Fig. 4. The specimen for bending 

 test shall be 1 in. by j- in. in section. 



(d) Cast Steel. The number of tests will depend on the 

 character and importance of the castings. Specimen 

 shall be cut cold from cupons molded and cast on some 

 portion of one or more castings from each melt or from 

 the sink heads, if the heads are of sufficient size. The 

 coupon or sink head, so used, shall be annealed with the 

 casting before it is cut off. Test specimens to be of the 

 form prescribed for pins and rollers. 



183. Annealed Specimens. Material which is to be used 

 without annealing or further treatment shall be tested in the 

 condition in which it comes from the rolls. When material is 

 to be annealed, or otherwise treated before use, the specimens 

 for tensile tests representing such material shall be cut from prop- 

 erly annealed or similarly treated short lengths of the full section 

 of the bar. 



184. Number of Tests. At least one tensile and one bending 

 test shall be made from each melt of steel as rolled. In case 



