ON THE MECHANICAL PROPERTIES OF STEEL. 



237 



Exp. XXXII. — Bar of Steel fi'om Mr, Sanderson, Sharrow Yale "Works. 

 Elongations taken on 8 inches length. Mark on bar, " S 2." Diameter 

 of specimen -737 inch. Area '4266 square inch. Eeduced dia- 

 meter after fracture '723 inch. Area -4105 square inch. 



IS 



Results. — Here the breaking strain (PJ per square inch of section __ 

 107,940 lbs., or 48^18 tons ; and the corresponding elongation (7,) per unit 

 of length is ^0318. By formula (13). — The work (m) expended in produ- 

 cing rupture = 1716. 



Exp. XXXIII. — Bar of Steel from Mr. Sanderson, Sharrow Vale Works. 

 Elongations taken on 8 inches length. Mark on bar, " S 3." Diameter 

 of specimen ^714 inch. Area -4003 square inch. Eeduced dia- 

 meter after fracture ^693 inch. Area ^3771 square inch. 



Specimen of single 



shear steel from 



^, a Swedish 



iron. 



Broke in neck. 



Residts. — Here the breaking strain (PJ per square inch of section is 107,182 

 lbs., or 47"84 tons ; and the corresponding elongation (ZJ per unit of length is 

 •0275. By formula (13). — The work (u) expended in producing rupture 

 = 1473. 



