Fatigue and Corrosion-fatigue Properties of Wrought Copper and Copper-base Alloys 315 



TABLE 16 

 THE CUPRO-NICKELS 



o Corroaion-fatigue limit, carbonated water, 24,000 p.s.i. for 5 X 10' cycles. 



'• Corroaion-fatigue limit, carbonated water, 20,000 p.s.i. for 7 X 10' cycles; salt water (brackish) 21,000 p.s 



= Corrosion-fatigue limit, carbonated water, 21,000 p.s.i. for 7 X 10' cycles; salt water (brackish) 22,000 p.s 



<* Torsion strength 66,000 p.s.i.; angle of twist 976 deg.; torsion endurance limit 14,500 p.s.i. 



" Torsion strength 60,000 p.s.i.; angle of twist 1,023 deg.; torsion endurance limit 17,000 p.s.i. 



f Corrosion fatigue, carbonated water, 22,000 p.s.i, for 7 X 10' cycles (notched specimen). 



Corrosion fatigue, carbonated water, 20,000 p.s.i. for 6 X 10^ cycles (notched specimen). 



f' Corrosion-fatigue limit, carbonated water, 20,000 p.s.i. for 7 X 10' cycles; salt water (brackish) 25,000 p.£ 



'■ Corrosion-fatigue limit, carbonated water, 18,000 p.s.i. for 8 X 10' cycles; salt water (brackish) 18,000 p.s 



. for 6 X 10' cycles. 

 . for 2 X 10' cycles. 



. for 4 X 10' cycles. 

 . for 5 X 10' cycles. 



