Factors Affecting Environmental Performance of High-Strength Bolts

by Walter K. Boyd, Chf.; Corrosion Res. Div., Columbus Labs., Battelle, Columbus, OH,
W. S. Hyler, Sr. Advisor; Struct. Mech. Dept., Columbus Labs., Battelle, Columbus, OH,

Serial Information: Journal of the Structural Division, 1973, Vol. 99, Issue 7, Pg. 1571-1588

Document Type: Journal Paper


Hydrogen-stress cracking and stress-corrosion cracking are two mechanisms which have been responsible for many premature failures in high-strength-steel structural members. Both the strength level and the magnitude of the stress are important factors in both fracture mechanisms. Galvanized A-490 bolts heat treated to within specification strength level did exhibit some susceptibility to stress corrosion cracking in both laboratory and natural environments. Black A-490 bolts, on the other hand, can be properly fabricated to eliminate problems from hydrogen-stress cracking and stress-corrosion cracking

Subject Headings: Cracking | Environmental issues | Bolts | Hydrogen | Failure analysis | Structural failures | Heat treatment | Job satisfaction

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