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BELL SYSTEM TECHNICAL JOURNAL 



percentage reduction are shown in Fig. 14. Table XII shows the 

 Rockwell hardness and tensile strength limits for alloy B. The 

 chemical composition limits are given in Table VI. 



Referring to the curve plotted in Fig. 14, showing the tensile 

 strength limits plotted against percentage of reduction, it is seen that 

 one series lies close to the upper curve whereas the remaining rolling 



60,000 70.000 80,000 90,000 100,000 110,000 120,000 

 TENSILE STRENGTH — PSI 



130,000 



Fig. 13 — Relation of Rockwell Hardness to Tensile Strength of Alloy B Nickel- 

 Silver Rolling Series Using 100 and 150-kg. Loads. 



series are nearer to the lower curve. This is due to the fact that the 

 bar rolled to No. 22 B. & S. gage sheet had a lighter anneal in the 

 ready-to-finish condition than the other bars, but it was felt that this 

 anneal was close to the commercial range of annealing practice and 

 consequently this series was given some weight when the commercial 

 limits were drawn up. 



