50 



Fig. I 



7Vo/e The gauge-length, parallel portions and fillets shall be as shown, but the 

 ends may be of any form which will fit the holders of the testing machine. 



13. Bend test specimens shall be machined to 1 x 1/2 inch in section, with corners 

 rounded to a radius not greater than 1/16 inch. 



Number 14. One tension and one bend test shall be made from each annealing charge. If 



of Tests more than one melt is represented in an annealing charge, one tension and one bend 



test shall be made from each melt. 



15. If any test specimen shows defective machining or develops flaws, it may be 

 discarded ; in which case the Contractor and the Engineer shall agree upon the selection 

 of another specimen in its stead. 



Retests 16. If the percentage of elongation of any tension test specimen is less than that 



specified above, under "Tension Tests", and any part of the fracture is more than 3/4 

 inch from the centre of the gauge length, as indicated by scribe-scratches on the speci- 

 men before testing, a retest shall be allowed. 



17. If the results of the physical tests of any test lot do not conform to the require- 

 ments specified, the Manufacturer may re-anneal such lot not more than twice, and 

 retests shall be made as specified above, under "Tension Tests" and "Bend Tests." 



WORKMANSHIP AND FINISH 



Finish 18. The castings shall conform substantially to the sizes and shapes of the patterns, 



shall be free from excessive shrinkage, and shall be made in a workmanlike manner. 



Defects 19. The castings shall be free from injurious defects. Minor defects which do not 



impair the strength of the castings may, with the approval of the Engineer, 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 required by the Engineer. 



Rejection 20. Castings which show injurious defects after machining will be rejected, not- 



withstanding any previous acceptance at the Manufacturer's works. 



