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CAMBKIA STEEL. 



III. PHYSICAL PROPERTIES AND TESTS. 

 Tension Tests. 



G. The steel shall conform to the following requirements as to tensile 

 properties: 



* See section 8. 



Yield Point. 



7. The yield point shall be determined by the drop of the beam of the 

 testing machine. 



Modifications in Elongation. 



8. (a) For plates over % in. in thickness, a deduction of 0.5 from the 

 specified percentage of elongation will be allowed for each increase of H in. in 

 thickness above M in., to a minimum of 20 per cent. 



(b) For plates under ^ in. in thickness, a deduction of 2.5 from the 

 percentage of elongation specified in section 6 shall be made for each decrease 

 of & in. in thickness below & in. 



Bend Tests. 



9. (a) Cold-bend tests shall be made on the material as rolled. 



(b) Quench-bend test specimens, before bending, shall be heated to a 

 light cherry red as seen in the dark (about 1200 deg. F.). and quenched in 

 water the temperature of which is about 80 deg. F. 



(q) Specimens for cold-bend and quench-bend tests of flange and firebox 

 steel shall bend through 180 deg. without fracture on the outside of the bent 

 portion, as follows: For material % in. and under in thickness, flat on them- 

 selves; for material over % in. up to 1> in. in thickness, around a pin the 

 diameter of which is equal to the thickness of the specimen; and for material 

 over 1M in- in thickness, around a pin the diameter of which is equal to l\ 

 times the thickness of the specimen. 



(d) Specimens for cold-bend and quench-bend tests of boiler rivet 

 steel shall bend cold through 180 deg. flat on themselves without fracture on 

 the outside of the bent portion. 



(e) Bend tests may be made by pressure or by blows. 



