Fatigue and Corrosion-fatigue Properties of Wrought Copper and Copper-base Alloys 317 



TABLE 18 

 TIN BRONZES 



" 0.50% extension, yield strength 54,700 p.s.i.; 0.20% offset yield strength 54,800 p.s.i.; modulus of elasticity 19 X 10^ p.s.i. 



f* Proportional limit 13,300 p.s.i.; modulus of elasticity 12.8 X lO^ p.s.i. 



<^ Proportional limit 52,500 p.s.i.; modulus of elasticity 15.5 X 10^ p.s.i. 



^ Proportional limit 54,400 p.s.i.; modulus of elasticity 14.8 X 10^ p.s.i. 



« Corrosion-fatigue limit, salt spray, 26,200 p.s.i. for 5 X 10^ cycles. 



^0.50% extension yield strength 60,000 p.s.i.; 0.20% offset yield strength 61,600 p.s.i.; modulus of elasticity 16.38 X 10^ p.s 



iJ Torsion strength 52,500 p.s.i.; angle of twist 810 deg.; torsion endurance limit 12,000 p.s.i. for 7 X 10^ cycles. 



i Torsion strength 50,500 p.s.i.; angle of twist 618 deg. 



' Corrosion -fatigue limit, carbonated water, 22,000 p.s.i. for 2 X 10' cycles. 



'■ Corrosion-fatigue limit, carbonated water, 23,000 p.s.i. for 5 X 10' cycles. 



■ Proportional limit 26,000 p.s.i.; modulus of elasticity 15.5 X 10^ p.s.i. 



f Modulus of elasticity 14 X 10^ p.s.i. 



' Proportional limit 55,000 p.s.i.; modulus of elasticity 15 X 10^. 



