312 



Copper and Copper-base Alloys 



TABLE 14 

 TIN BRASSES 



i 



" Corrosion-fatigue limit for both salt and carbonated water 17,000 p.s.i. for 4 X 10^ cycles. 



' 0.50% extension yield strength 59,500 p.s.i.; 0.20% offset yield strength 61,800 p.s.i.; modulus of elasticity 17.04 X 10« p.s.i. 



«0.5% extension yield strength 62,900 p.s.i.; 0.20% offset yield strength 69,200 p.s.i.; modulus of elasticity 15.75 X 10« p.s.i. 



<* Corrosion-fatigue limit for both carbonated and salt water 17,000 p.s.i. for 5 X 10^ cycles. 



" Corrosion-fatigue limit for salt water 17,000 p.s.i. for 5 X 10^ cycles. 



/0.50% extension yield strength 39,300 p.s.i.; 0.20% offset yield strength 38,300 p.s.i.; modulus of elasticity 14.1 X 108 p.s.i. 



f Tension specimens 0.313 in. in diameter, fatigue specimens 0.300 in. in minimum diameter; machined from 0.500-in.-diameter rod. Fatigue tests run at 

 3,500 r.p.m. 



» 0.50% yield strength (extension) 49,000 p.s.i.; 0.20% offset yield strength 50,500 p.s.i.; modulus of elasticity 14.07 X 10= cycles. 



» Tension specimens 0.313 in. in diameter; fatigue specimens 0.300 in. in minimum diameter; machined from l.OO-in.-diameter rod; specimen axes ^ in. from 

 surface of rod. Fatigue tests run at 3,500 r.p.m. 



' 0.50% extension yield strength 49,900 p.s.i.; 0.20% offset yield strength 53,700 p.s.i.; modulus of elasticity 13.44 X 10« p.s.i. 



' 0.50% extension yield strength 53,500 p.s.i.; 0.20% offset yield strength 55,000 p.s.i.; modulus of elasticity 14.44 X 10= p.s.i. 



