The Tin Brasses 



153 



11.0 20.7 2Q.4 372 44.0 50.0 55.5 60.5 64.8 68.6 

 Percent Reduction of Area by Rolling 

 01 23456789 10 

 B SS Numbers Hard 

 Chabt 56. — The effect of cold rolling on the tensile Btrength and 

 apparent elastic limit of Government naval-brass strip, previously 

 annealed to two different grain sizes, 0.015 and 0.080 mm. (61.51 % 

 copper, 0.57 % tin, balance zinc) (0.040-iti. stock) . 



II.O 20.7 29.4 372 440 50.0 55.5 60.5 64.8 68.6 

 Percent Reduction of Area by Rolling 

 01 23456789 10 

 B and S Numbers Hard 

 Chart 57. — The effect of cold rolling on the Rockwell hardness 

 and percentage elongation in 2 in. of Government naval-brass strip, 

 previously annealed to two different grain sizes, 0.015 and 0.080 mm. 

 (61.51 % copper, 0.57 % tin, balance zinc) (0.040-in. stock). 



11.0 20.7 294 372 44.0 500 55.5 60.5 643 68.6 



Percent Reduction of Areci by Rolling 



1 23456789 10 



B S- S Numbers Hard 



Chaet 58. — The effect of cold rolling on the yield strengths of 



Government naval-brass strip, previously annealed to a grain size of 



0.015 mm. (61.51 % copper, 0.57 % tin, balance zinc) (0.040-in. stock). 



100 



. 90 

 C 



d- 80 

 00 



t 70 



CL 



^ 60 



_i 



§ 50 

 o 



~ 40 



30 

 20 

 10 







11.0 207 29.4 372 44.0 500 55.5 60.5 64.8 68.6 

 Percen-f Reduction of Area by Rolling 

 012345678P10 

 B 5 S Numbers Hard 



Chakt 59. — The effect of cold rolling on the yield strengths of 

 Government naval-brass strip, previously annealed to a grain size of 

 0.080 mm. (61.51 % copper, 0.57 % tin, balance zinc) (0.040-iu. stock). 



