300 



Copper and Copper-base Alloys 



TABLE 6 

 CUPRO-NICKELS 



offset; all tensile specimens 0.25 in. in diameter machined from 1-ii 



diameter machined from 1 



-diameter commercial rod; impact — standard Izod specimens, all 

 diameter commercial rod; impact — standard Izod 



"Yield strength 0.10 

 specimens unfractured. 



''Yield strength — drop of beam method; all tensile specimens 0.504 

 specimens, all specimens unfractured. 



« Impact tests made by Battelle Institute in .1936 for American Brass Company. Standard Charpy specimens (keyhole) (notch) cut from 0. 7 50-in. -diameter rod. 

 120 ft.-lb. Amsler machine used. Specimens tested in standard time of 5 sec. after removal from bath at stated temperature. Specimens at — IIS^C. were frozen 

 in ether with Hquid air and allowed to heat to testing temperature. All others in bath 15 min. at testing temperature. Figures are average of three tests. AU 

 Charpy specimens were unfractured. 



