AMPP Store - Products tagged with 'nickel alloys'

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Hydrogen Stress Cracking Resistance Of High Strength Alloys For Subsea Fasteners

Product Number: 51321-16709-SG

Author: Thierry Cassagne, Dominique Thierry

Publication Date: 2021

$20.00

Bolted connections for subsea flanges and other components must be reliable as they are often used for pressure containing components (subsea Christmas trees, connectors …). When possible, the primary choice for bolting is low-alloy steel with a limitation of actual yield strength (135 ksi) and a maximum hardness of 34 HRC to prevent HSC.

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Hydrogen Stress Cracking Resistance of Precipitation Hardenable Nickel Alloys and Optimization

Product Number: 51324-20719-SG

Author: Stephen McCoy; Brian A. Baker; William MacDonald

Publication Date: 2024

$40.00

The material trend in the Oil & Gas sector is for high strength materials with high levels of corrosion resistance to resist increasingly harsh sour downhole environments. Compared to sweet wells the presence of hydrogen sulphide, elemental sulphur and hydrogen generally requires material selection of tubular and bar products in high performance stainless steels and nickel base alloys to withstand the pressures and temperatures. The materials of choice must be corrosion resistant, cost effective, reliable and have the strength required for the well design conditions. The material selection for downhole and well head equipment such as hangers, sub-surface safety valves, pumps and packers require age-hardenable materials to obtain the strength in heavier cross sections which cannot be strengthened by cold work. The commonly used nickel alloys for the sour service applications are alloy UNS N09925 (925), alloy UNS N07718 (718) and alloy UNS N07725 (725) with the more recently developed alloy UNS N09945 (945) and alloy UNS N09946 (945X) designed for HP/HT and sour wells. The metallurgical stability and freedom from detrimental phases of these materials being increasingly important to optimise the mechanical and corrosion resistant properties, particularly as larger section thicknesses of higher strength materials. The effect of the microstructure of these materials is shown to have a significant effect on the resistance to hydrogen attack and corrosion in sour environments. Optimising the compositional control, thermomechanical processing and microstructure is shown to give significant improvements in resistance to sour corrosion and hydrogen stress cracking resistance of materials used for critical downhole components. Over recent years there has been increasing industry demand to improve quality control and categorise the various PH Nickel alloy grades resistance to Hydrogen Stress Cracking (HSC) for critical High Pressure-High Temperature environments. HSC is a complex corrosion mechanism with many factors including composition, strength, microstructure, and grain boundary cleanliness influencing susceptibility. Evaluation efforts have used multiple techniques to measure the effects of HSC resistance, with this paper focusing on the Slow Strain Rate Test (SSRT) method according to TM0198 Method C(1) and using the quality control standard API*6ACRA(2). The purpose of the paper is to present results using the TM0198:C slow strain rate test method in a hydrogen charging environment and show the HSC resistance of the grades 925, 718, 945, 945X, and 725. This paper shows how the composition can be controlled within the defined limits of the alloy grade to optimise the HSC resistance by reducing precipitation of deleterious phases and reduce mill heat batch variation. The SSRT results are compared with mechanical properties determined according to API6ACRA(2) and detailed microstructural analysis.

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Inhibition of Crevice Corrosion of Ni-Cr-Mo Alloys by Sulfate, Nitrate and Molybdate

Product Number: 51323-18936-SG

Author: Eduardo Sáenz González, Martín A. Rodríguez, Edgar C. Hornus

Publication Date: 2023

$20.00

Nickel base alloys with high chromium and molybdenum contents are very resistant to chloride-induced localized corrosion, even at relatively high temperatures. These alloys include the Ni-Cr-Mo(W) or
“C” family of alloys and the novel Ni-Mo-Cr alloy HYBRID-BC1 (UNS N10362). Alloy 22 (UNS N06022) stands out due to its versatility: chromium and molybdenum contents were selected to optimize its corrosion behavior in oxidizing and reducing conditions. Alloy 625 (UNS N06625) has outstanding thermal ageing resistance and a longer in-service experience. The

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Investigations on the Microstructural Stability after Long-term High-temperature Exposure of Alloy 699 XA

Product Number: 51323-18845-SG

Author: Tatiana Hentrich, Heike Hattendorf, Sabine Bellmann, Benedikt Nowak

Publication Date: 2023

$20.00

VDM Alloy 699 XA (UNS N06699, EN Alloy number 2.4842) is a new alloy, which was developed for applications in the petrochemical industry under metal dusting conditions between 400°C and 800°C. Important properties of a new material are corrosion resistance, such as to metal dusting, oxidation resistance, and workability versus high temperature strength, which are essential for industrial applications. Currently, there are material solutions which demonstrate good metal dusting resistance, but may have issues with workability. In addition, there are also minimum requirements concerning creep resistance. It is therefore of fundamental interest, in the context of alloy design, to develop materials that has these important properties and satisfies the needs of industrial users.

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NACE Publication 6A287-1997, Electroless Nickel Coatings (1997 Edition)

Product Number: 24089-SG

ISBN: N/A

Publication Date: 1997

$179.00

Electroless nickel is a term used to describe plating of a nickel-alloy coating onto a suitable substrte by chemical reduction. The process is sometimes also called autocatalytic nickel or chemical nickel, especially in Europe. HISTORICAL DOCUMENT

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NACE SP0199-2024, Installation of Stainless Chromium-Nickel Steel and Nickel-Alloy Roll-Bonded and Explosion-Bonded Clad Plate in Air Pollution Control Equipment

Product Number: NACE SP0199-2024

$109.00

The purpose of this standard practice is to provide technical and quality assurance guidelines for the fabrication, welding, and installation of stainless chromium-nickel steel and nickel-alloy roll-bonded and explosion-bonded clad plate in air pollution control equipment. It is intended for use by personnel including architect-engineers, designers, fabricators, and personnel from electric utilities.

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On the Sea Water Corrosion Resistance of Alloy 825 CTP (UNS N08827), an Improved Version of Alloy 825 (UNS N08825)

Product Number: 51324-20983-SG

Author: Julia Botinha; Katharina Utens; Philipp Huebner; Daniela Zander; Helena Alves

Publication Date: 2024

$40.00

UNS(1) N08827, commercially called Alloy 825 CTP(2), represents a significant advancement of UNS N08825 (Alloy 825)(2) by virtue of its tailored chemical composition, resulting in enhanced localized corrosion resistance. The key modification in UNS N08827 involves a notable augmentation in molybdenum content, which has been raised to approximately 6%, twice the amount found in the conventional UNS N08825, which contains 3% molybdenum. Consequently, this alloy surpasses a critical threshold for the pitting resistance equivalent number (PREN) by exceeding 40, a prerequisite for specific applications within the oil and gas sector. Prior investigations have already demonstrated the heightened resistance of UNS N08827 to pitting and crevice corrosion when exposed to ferric chloride solutions, as evidenced by ASTM(3) G48 C and D tests. Building upon this foundation, the subsequent objective was to assess the corrosion performance of this alloy in an artificial seawater environment. This research paper presents the outcomes obtained from subjecting Alloy 825 CTP UNS N08827 to ASTM G61 and ASTM G150 tests, focusing on its corrosion behavior.

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The Development of Highly Corrosion Resistant PH Nickel Bar for Sour Oil and Gas and HydrogenStress Cracking Resistance

Product Number: MECC23-20363-SG

Author: Stephen McCoy; Brian A. Baker; William MacDonald

Publication Date: 2023

$20.00

The Precipitation Hardenable Nickel alloys 925, 718, 945, 945X and 725 are widely used for critical downhole oil field applications such as high strength tubing hangers and completion equipment. The materials are particularly useful in High Pressure/High Temperature wells where high strength and corrosion resistance are required in H2S containing production fluids.

Figure 1 shows a graphical summary of environmental service limits for the application of precipitation hardened nickel alloys defined within the NACE/ISO standards.

Products tagged with 'nickel alloys'

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