The Brasses 



57 



100 — V 



90 



j.80 

 - 70 



J 



> 50 



; 40 



I 30 



' 20 



10 



0.002 0.004 0.006 0.008 0.010 

 Strciin^ Inches per In. 



0.012 



Chart 88. — The effect of cold rolling on the stress-strain charac- 

 teristics of special spring-brass strip (0.040 in. thick) having a ready- 

 to-finish grain size of 0.015 mm. (74.69% copper); 5,000-lb. capacity 

 hydraiilio testing machine and Templin automatic extensometer 

 accurate to 0.00001 in. used. 



100 



90 



~ 80 

 & 

 t 70 



^60 



50 

 o 



o 



-40 



1 30 



■^ 20 



10 

 







0.002 



0.012 



0.004 0006 0008 0.010 

 S+rain, Inches per In. 



Chart 89. — The effect of cold rolling on the stress-strain charac- 

 teristics of special spring-brass strip (0.040 in. thick) having a ready-to- 

 finish grain size of 0.095 mm. (74.69% copper); 5,000-lb. capacity 

 hydraulic testing machine and Templin automatic extensometer 

 accurate to 0.00001 in. used. 



60 



50 



40 



'f30 



20 



200 



400 600 800 1000 

 Tempera+ure; Deg.F, 



1200 1400 



30 40 50 



Shear Sfreng+h^ 1,000 Lb. per Sq.ln. 



Chart 90. — The effect of temperature on the Izod-impact strength Chart 91. — Conversion chart for determination of shear strength 



of previously annealed spring brass (75.00 % copper) according to of spring brass (75.00 % copper, balance zinc) when tensile strength is 

 D. Bunting.''' known. Accurate to ±5%.'*'* 



