PART V 



MATERIALS AND WORKMANSHIP 



MATERIALS FOR STRUCTURAL AND RIVET STEEL 



175. Process of Manufacture. Steel shall be manufactured 

 by the open-hearth process. 



176. Schedule of Requirements. The chemical and physical 

 properties shall conform to the following limits, except as modified 

 in Pars. 177 to 180 and 248. The yield point, as indicated by 

 the drop of beam, shall be recorded in the test reports. 



177.* Allowable Variations. If the ultimate strength varies 

 more than 4000 Ibs. from that desired a retest shall be made 

 on the same gauge, which, to be acceptable, shall be within 5000 

 Ibs. of the desired ultimate. 



i78.f Modification in Elongation. For material less than 

 & in. and more than in. in thickness the following modifica- 

 tions will be allowed in the requirements for elongation : 



: 43 



