The Brasses 



35 



11.0 20.7 29.4 372 44.0 50.0 55.5 60.5 648 68.6 

 Percent Reduction of Area by Rolling 

 12345 6789 10 

 BS'S Numbers Hard 



Chabt 14. — The effect of cold rolling on the tensile strength and 

 apparent elastic limit of commercial bronze (Government-gilding) 

 strip, previously annealed to two different grain sizes, 0.015 and 0.070 

 mm. (89.74% copper) (0.040-iu. stock). 



100 



S 70 



CO 



i^ 50 

 I 40 



i 30 

 a 

 I 

 _ 20 



ii.O 20.7 29.4 372 44.0 50.0 55.5 60.5 64.8 68.6 

 Percent Reduction of Area by Rolling 

 12 34 56789 10 

 BS5 Numbers Hard 



Chakt 15. — The effect of cold rolling on the Rockwell hardness of 

 commercial bronze (Government-gilding) strip, previously annealed 

 to two different grain sizes, 0.015 and 0.070 mm. (89.74 % copper) 

 (0.040-in. stock). 



11.0 20.7 294 372 44.0 50.0 55.5 60.5 64.8 68.6 

 Percent Reduction of Area by Rolling 

 012 34567 89 10 

 BKfS Numbers Hard 



Chakt 16. — The effect of cold rolling on the percentage elongation 

 in 2 in. of commercial bronze (Government-gilding) strip, previously 

 annealed to two different grain sizes, 0.015 and 0.070 mm. (89.74 % 

 copper) (0.040-in. stock). 



11.0 207 294 372 440 50.0 55.5 60.5 64.8 68.6 

 Percent Reduction of Area by Rolling 

 01.23 45 6 78 9 10 

 BZtS Numbers Hard 

 Chart 17. — The effect of cold rolling on the yield strengths of 

 commercial bronze (Government-gilding) strip, previously annealed 

 to a grain size of 0.015 mm. (89.74 % copper) (0.040-in. stock). 



