Development of a new fastener alloy resistant to hydrogen embrittlement

Abstract

In recent years, it has become apparent that alloys based on nickel, iron, and titanium are susceptible to hydrogen embrittlement, particularly when operating at high stress levels, in the cold worked condition, and on structures employing cathodic protection. This paper describes the development of a copper based fastener alloy, designated Marinel, having mechanical properties comparable with high strength carbon steel B7 commonly used in the manufacture of bolts, combined with substantial immunity to hydrogen embrittlement and good corrosion resistance in marine environments.