...Abstract The performance of bolts in drilling and production systems is determined by many parameters, such as the bolting material structure and properties, metallic and non-metallic coatings, installation factors (e.g., torque), and operational factors (cathodic polarization, etc...

... by cold working, while retaining significant ductility, toughness, impact strength and Resistance to hydrogen-induced cracking. A qualification program is being conducted by the U.S. Navy (USN) in collaboration with a Nickel Alloy manufacturing plant to qualify alloy 686 bolting for use in new ship...

... the annealed and age-hardened condition and the direct age-hardened condition. In these age-hardened conditions, alloy 725 exhibits excellent potential for marine springs, fasteners and hardware. age-hardenable nickel-base alloys seawater pitting crevice corrosion fatigue resistance bolting springs...

... and toughness. age-hardenable solid solution nickel-base alloys seawater pitting crevice corrosion fatigue resistance bolting springs INTRODUCTION The U.S. Navy and their contractors often use corrosion-resistant fasteners with corrosion-sensitive materials such as steel, which require cathodic...

... protected systems when the yield strength exceeds 140 ksi (965 MPa). Bolting fasteners high strength cathodic protection hydrogen embrittlement stress corrosion cracking subsea seawater INTRODUCTION It is recognized that high strength steels are prone to SCC and HE and their resistance decreases...

... and toughness. age-hardenable solid solution nickel-base alloys seawater pitting crevice corrosion fatigue resistance bolting INTRODUCTION The U.S. Navy and others often uses corrosion resistant fasteners with corrosion sensitive materials such as steel, which requires cathodic protection. For example...

...Abstract The excellent corrosion resistance of nickel-alloys has been put to good use in marine engineering for many years. Some applications, such as bolting, require high levels of strength as well as corrosion resistance. New high strength nickel-alloys and their weldments exhibit excellent...

... exhibits excellent resistance to hydrogen embrittlement and corrosion, and exceptional strength, ductility and toughness. solid solution nickel-base alloys seawater pitting crevice corrosion fatigue resistance bolting INTRODUCTION Tables 8 displays Room Temperature Threaded Fastener Tensile Data...

... and toughness. solid solution nickel-base alloys seawater pitting crevice corrosion fatigue resistance bolting INTRODUCTION The U.S. Navy often uses corrosion resistant fasteners with corrosion sensitive materials such as steel, which requires cathodic protection. For example, MONEL alloy K-500 (UNS...

...-alloys has been put to good use in marine engineering for many years. Some applications, such as bolting, require high levels of strength as well as corrosion resistance. New high strength nickel-alloys and their weldments exhibit excellent resistance to hydrogen embrittlement and seawater corrosion...

... loaded critical components such as bolting on Naval vessels and offshore structures. The minimum mechanical properties of the cupronickel are shown in Table 2 . It was regarded as important to match B7 steel strength and elongation with a minimum average notch ductility of 27J. Typical mechanical...

... with cathodic protection during the test only. EMBRITTLED ALLOYS Nickel Based X-750 Alloy The X-750 alloy is often used for high temperature bolting. The slow strain rate specimens were machined from a 1/2-inch diameter rod that had been annealed at 1625°F (885°C). It was one of the lower strength alloys...

... SSC is the use of lower strength (low hardness) materials. Alternatively, very highly alloyed, high strength nickel base alloys can be utilized which are resistant to SSC, but can be very expensive. A common problem encountered in sour (H₂S) service applications involves bolting, fasteners...