CAMBKIA STEEL. 



397 



material ordered. The manufacturer shall afford the inspector, free of cost, 

 all reasonable facilities to satisfy him that the material is being furnished in 

 accordance with these specifications. All tests and inspection shall be made 

 at the place of manufacture prior to shipment, and shall be so conducted as 

 not to interfere unnecessarily with the operation of the works. 



Rejection. 



19. Material which, subsequent to the above tests at the mills and its 

 acceptance there, develops weak spots, brittleness, cracks or other imperfec- 

 tions, or is found to have injurious defects, may be rejected at the shop, and 

 shall then be replaced by the manufacturer at his own cost. 



BOILER STEEL. 



Grades. 



1. There shall be three grades of steel for boilers, namely: flange, firebox, 

 and boiler rivet. 



I. MANUFACTURE. 

 Process. 



2. The steel shall be made by the open-hearth process. 



II. CHEMICAL PROPERTIES AND TESTS. 

 Chemical Composition. 



3. The steel shall conform to the following requirements as to chemical 

 composition: 



Ladle Analyses. 



4. To determine whether the material conforms to the requirements 

 specified in section 3, an analysis shall be made by the manufacturer from a 

 test ingot taken during the pouring of each melt. A copy of this analysis 

 shall be given to the purchaser or his representative. 



Check Analyses. 



5. A check analysis may be made by the purchaser from a broken tension 

 test specimen representing each plate as rolled, and this analysis shall conform 

 to the requirements specified in section 3. 



