160 



W. H. WARREN AND S. H. BARRACLOUGH. 



Table IV. 



Determination of elastic limit and coefficient of elasticity of Vicker's 

 axle steel No. "5" in tension. 



Length upon which extensions were measured = 150 mm. (6 in.) 



Diameter = 0-610" Area = 0-2922 square inches. 



Load in 



Readings in ^-^ o" mm - 



* Mean 

 Extension 



Differences per 



| 1,000 lbs. 



Top. 



Bottom. 



^ who mm - 



1,000 lbs. 



1 



1-39 



7-52 



8-91 



1-75 



2 



2-15 



8'51 



10-66 



1-83 



3 



2-99 



9-50 



12-49 



1-81 



4 



3-89 



10-41 



14-30 



1-78 



5 



4-77 



11-31 



16-08 



1-82 



6 



5-66 



12-24 



17'90 



1-73 



7 



6-51 



1312 



19-63 



1-78 



8 



7-39 



14-03 



21-42 



1-84 



9 



8-29 



14-97 



2326 



1-87 f Limit of 



10 



9-20 



15-93 



25-13 



Elasticity 

 1-86 



11 



10-09 



16-90 



26-99 



2-74 



11-5 



10-78 



17-58 



28-36 





,500 



f Limit of Elasticity = 9,500 lbs. or A OQOO = 32,500 lbs. per sq. in. 



0-2922 (14 . 5 tong) 



Coefficient of Elasticity = 28,680,000 lbs. per sq. in. 

 = 12,805 tons per sq. in. 



