304 



Copper and Copper-base Alloys 



TABLE 2 



EFFECT OF OXYGEN ON FATIGUE STRENGTH OF COPPER 



According to Gough, Gillet, and Mack and Hanson and Ford 



" Approximate endurance limit, determined by a short-cut method, 



* Izod, specimens unbroken. 



^ Specimens made in laboratory, not entirely sound. 



^ 5 X 10' reversals of stress. 



TABLE 3 



EFFECT OF PHOSPHORUS ON FATIGUE STRENGTH OF COPPER 



According to Hanson, Archbutt, and Ford 



■ Izod, not broken. 



