Low-temperature Mechanical Properties oj Wrought Copper and Copper-base Alloys 299 



TABLE 5 

 NICKEL SILVERS 



<• Alloy composition and previous history not available. 



* Yield strength 0.10% offset; all tensile tests on 0.25-in. -diameter specimens machined from l-in.-diameter commercial rod; impact — standard Izod specimens, 

 all specimens unfractured. 



c Yield strength — drop of beam; all tensile tests on 0.504-in.-diameter specimens machined from l-in.-diameter commercial rod. 



<* Impact tests made by Battelle Institute in 1936 for American Brass Company. Standard Charpy specimens (keyhole) (notch) cut from 0.750-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 — 115°C. were 

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

 All Charpy specimens were unfractured. 



