512 ENGINEERING MATERIALS. CHAP. XV 



design of the castings will permit. If the castings weigh less than 500 lb., or are of such a design 

 that test bars cannot be attached, two test bars shall be cast to represent each melt; or the quality 

 of the castings shall be determined by tests to destruction as specified in Section II. All test 

 bars shall be annealed with the castings they represent. 



(b) The manufacturer and purchaser shall agree whether test bars can be attached to castings, 

 on the location of the bars on the castings, on the castings to which bars are to be attached, and 

 on the method of casting unattached bars. 



(c) Tension test specimens shall be of the form and dimensions shown in Fig. i. Bend test 

 specimens shall be machined to I by 5 in. in section with corners rounded to a radius not over re in. 



13. Number of Tests, (a) One tension and one bend test shall be made from each annealing 

 charge. If more than one melt is represented in an annealing charge, one tension and one bend 

 test shall be made from each melt. 



(6) If any test specimen shows defective machining or develops flaws, or if a tension test 

 specimen breaks outside the gage length, it may be discarded; in which case the manufacturer and 

 the purchaser or his representative shall agree upon the selection of another specimen in its stead. 



IV. WORKMANSHIP AND FINISH. 



14. Workmanship. The castings shall substantially conform to the sizes and shapes of the 

 patterns, and shall be made in a workmanlike manner. 



15. Finish, (a) The castings shall be free from injurious defects. 



(b) Minor defects which do not impair the strength of the castings may, with the approval 

 of the purchaser or his representative, be welded by an approved process. The defects shall first 

 be cleaned out to solid metal; and after welding, the castings shall be annealed, if specified by the 

 purchaser or his representative. 



(c) The castings offered for inspection shall not be painted or covered with any substance 

 that will hide defects, nor rusted to such an extent as to hide defects. 







V. INSPECTION AND REJECTION. 



1 6. Inspection. The inspector representing the purchaser shall have free entry, at all times 

 while work on the contract of the purchaser is being performed, to all parts of the manufacturer's 

 works which concern the manufacture of the castings ordered. The manufacturer shall afford the 

 inspector, free of cost, all reasonable facilities to satisfy him that the castings are being furnished 

 in accordance with these specifications. All tests (except check analyses) and inspection shall be 

 made at the place of manufacture prior to shipment, unless otherwise specified, and shall be so 

 conducted as not to interfere unnecessarily with the operation of the works. 



17. Rejection, (a) Unless otherwise specified, any rejection based on tests made in accord- 

 ance with Section 8 shall be reported within five working days from the receipt of samples. 



(b) Castings which show injurious defects subsequent to their acceptance at the manu- 

 facturer's works will be rejected, and the manufacturer shall be notified. 



18. Rehearing. Samples tested in accordance with Section 8, which represent rejected 

 castings, shall be preserved for two weeks from the date of the test report. In case of dissatis- 

 faction with the results of the tests, the manufacturer may make claim for a rehearing within that 

 time. 



VI. SPECIAL REQUIREMENTS FOR CASTINGS FOR SHIPS. 



19. Castings for Ships. In addition to the preceding requirements, castings for ships, when 

 so specified, shall conform to the following requirements: 



20. Heat Treatment. All castings shall be annealed. 



21. Number of Tests, (a) One tension and one bend test shall be made from each of the 

 following castings: stern frames, stern posts, twin screw spectacle frames, propeller shaft brackets, 

 rudders, steering quadrants, tillers, stems, anchors, and other castings when specified. 



(b) When a casting is made from more than one melt, four tension and four bend tests shall 

 be made from each casting. 



22. Percussion Tests, (a) A percussion test shall be made on each of the following castings: 

 stern frames, stern posts, twin screw spectacle frames, propeller shaft brackets, rudders, steering 

 quadrants, tillers, stems, anchors, and other castings when specified. 



(b) For this test, the casting shall be suspended by chains and hammered all over with a 

 hammer of a weight approved by the purchaser or his representative. If cracks, flaws, defects, 

 or weakness appear after such treatment, the casting will be rejected. 



VII. SPECIAL REQUIREMENTS FOR CASTINGS FOR RAILWAY ROLLING STOCK. 



23. Castings for Railway Rolling Stock. Castings for railway rolling stock, when so specified, 

 shall conform to the requirements for Class B castings, Sections I to 18, inclusive, except that 



