40 



Copper and Copper-base Alloys 



200 400 600 800 1000 1200 



Tempera+ure, Deg.F 



Chart 34. — The effect of elevated temperature on the Izod-impact 

 strength of annealed commercial bronze (90.00 % copper) according to 

 D. Bunting.!'' 



30 40 50 



Shear Sireng+h, 1000 Lb. per Sq. In. 



Chart 35. — Conversion chart for determination of shear strength 

 of commercial bronze (90.00 % copper, balance zinc) when tensile 

 strength ia known. Accurate to ±6 %/^^* 



FooTNOTEa FOR Table 3 



diameter with a ready-to-finish grain size, 0.050 i 



o Refers to rod cold-drawn 50 % ; rod under 1 i 



6 Refers- to i050°F. for 1 hr. 



<= Material cold-forged from soft rod (5—40% reduction of area). 



<* Material cold-forged from cold-worked condition (40%). 



< 6 B. & S. Nos., hard, 0.070-0.015 grain size at ready-to-finiah, respectively, 



/ Refers to 1100°F. anneal (1 hr. at temperature). 



" Apply to strip only (all tests conducted on 0.040-in. stock). 



* Extruded, reduced, and cold-drawn to ^ by 0.049 in. 



^ 960*F. anneal for 1 hr. 



