310 



Copper and Copper-base Alloys 



TABLE 11 

 66-36, 2 AND 1, OR COMMON HIGH BRASS 



i-fatigue limit, carbonated water, 12,000 p.s.i. for 4 X 10' cycles. 

 '> Corrosion-fatigue limit, carbonated water, 12,000 p.s.i. for 5 X 10' cycles. 

 = Corrosion-fatigue limit, carbonated water, 12,000 p.s.i. for 3 X 10' cycles. 

 <* Corrosion-fatigue limit, salt water (brackish), 12,000 p.s.i. for 6 X 10' cycles. 

 " Corrosion-fatigue limit, salt water (brackish), 12,000 p.s.i. for 10' cycles. 

 ■'■ Proportional limit 13,000 p.s.i.; modulus of elasticity 14.5 X 10^ 

 " Proportional limit 32,000 p.s.i.; modulus of elasticity 15.6 X 10^ 

 '' Proportional Hmit 30.000 p.s.i.; modulus of elasticity 14.9 X 10^ 

 ■0.50% extension j-ield strength 54,000 p.s.i.; 0.20% offset yield strength 56,000 p.s 



odulus of elasticity 15.7 X 10^ p.3, 



