40 



Bend Tests 



Test 

 Specimens 



10. The test specimens for plates, shapes and bars (except those for eyebar flats, 

 for pins, rollers and other bars when 1 x 1/2 inch in section, and for rivet steel) shall bend 

 cold through 180 degrees without cracking on the outside of the bent portion, as follows: 

 for material 3/4 inch or under in thickness, flat on themselves; for material over 3/4 inch 

 to and including \y^ inches in thickness, around a pin the diameter of which is equal to 

 the thickness of the specimen; and for material over \% inches in thickness, around a 

 pin the diameter of which is equal to twice the thickness of the specimen. 



11. The test specimens for eyebar flats shall bend cold through 180 degrees without 

 cracking on the outside of the bent portion, as follows: for material 3/4 inch or under in 

 thickness, around a pin the diameter of which is equal to the thickness of the specimen; 

 for material over 3/4 inch to and including \% inches in thickness, around a pin the dia- 

 meter of which is equal to twice the thickness of the specimen; and for material over 

 1*4 inches in thickness, around a pin the diameter of which is equal to three times the 

 thickness of the specimen. 



12. The test specimens for pins, rollers and other bars when 1 x 1/2 inch in section, 

 when prepared as specified below under "Test Specimens", shall bend cold through 180 

 degrees around a one inch pin without cracking on the outside of the bent portion. 



13. The test specimens for rivet steel shall bend cold through 180 degrees flat on 

 themselves without cracking on the outside of the bent portion. 



TEST SPECIMENS 



14. Test specimens shall be prepared for testing from the material in its rolled or 

 forged condition, except v;hen it is specified to be annealed; in which case the test 

 specimens shall be prepared from the material as annealed for use, or from a short length 

 of a full section similarly treated. 



15. Test specimens shall be taken longitudinally, and, except as otherwise specified 

 herein, shall be of the full thickness or diameter of material as rolled. 



16. Test specimens for plates, shapes, and flats may be machined to the form 

 and dimensions shown in Fig. 1, or with both edges parallel; except that bend test 

 specimens for eyebar flats may have three rolled sides. 



17. Tension test specimens for plates and eyebar flats over 1> inches in thickness, 

 and bend test specimens for plates over \}4 inches in thickness, may be machined to a 

 thickness or diameter of at least 3/4 inch for a length of at least 9 inches. 



