the specimen is generally done by blows of a hammer, although steady pressure is sometimes 

 employed. Notwithstanding that no numerical results are obtainec from the cold-bend test, ex- 

 cept the final angle of bending, the general information that it gives is of the highest im- 

 portance, so that it has been said that, if ull tests of metals except one were to be abandoned. 

 the cold-bend test should be the one to be retained. In the rolling mill it is used to judge of the 

 purity and quality of the mock bar; in the steel mill it serves to classify and grade the material 

 almost as well as chemical analysis can do, and in the purchase of shape iron it affords a quick 

 and satisfactory method of estimating toughness, ductility, strength and capacity to resist ex- 

 ternal work." Merriman "Mechanics of Materials" (1905), Page 439. 



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