SHEET NON-FERROUS METALS 



779 



Nickel Silver: 



Two nickel-silver alloys were investigated, one containing nom- 

 inally 72 per cent of copper, 10 per cent of zinc and 18 per cent of 

 nickel, which will be designated "alloy A"; and the other containing 

 55 per cent of copper, 27 per cent of zinc, and 18 per cent of nickel 

 and designated "alloy B." Alloy A is used mainly .for forming and 

 deep drawing purposes, whereas alloy B is used for springs. 



110,000 



100,000 



30,000 



10 20 30 40 50 



PERCENT REDUCTION BY ROLLING 



Fig, 9 — -Relation of Tensile Strength to Percentage of Reduction by Rolling of 

 Alloy G Brass Rolling Series. 



Alloy A Nickel-Silver Sheet. — The average composition of three 

 bars of alloy A cast from the same pot of metal are given in Table VII. 

 Table XI shows the physical properties of alloy A. Figure 11 shows 

 the Rockwell hardness-tensile strength relationship and Fig. 12 shows 

 the tensile strength limits plotted against percentage of reduction. 

 The tensile strength and Rockwell hardness limits for this material 

 are given in Table XII and the composition limits in Table VI. 



