AMPP Store - Products tagged with 'austenite'

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03102 LIMITATIONS OF 17- 4 PH METALLURGICAL, MECHANICAL AND CORROSION ASPECTS

Product Number: 51300-03102-SG

ISBN: 03102 2003 CP

Author: T. Cassagne, M. Bonis, C. Duret, J.L. Crolet

Publication Date: 2003

$20.00

In context of acceptability of 17-4 PH in sour service, an literature survey of complex metallurgy of this grade was done following a mechanical rupture in service. In addition, three 17-4 PH materials were studied in terms of microstructure, mechanical properties and susceptibility to sulfide stress cracking.

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High Strength Austenite For Additive Manufacturing

Product Number: 51322-17496-SG

Author: Dr. Andreas Mohr, Dr. Horst Hill, Dipl.-Ing. Karlheinz P.J. Hoeren, M.sc. Janosch Conrads

Publication Date: 2022

$20.00

Typical austenitic stainless steels like 316L (S31603) contain chromium, nickel, and, optionally, molybdenum as major alloying elements. These are required to provide their beneficial properties, which include e.g. very high corrosion resistance and high ductility and toughness, yet showing comparably low strength and hardness. General corrosion resistance is primarily achieved by the element chromium, which causes formation of a thin but dense chromium oxide layer on the surface, when the amount of chromium dissolved in the metallic matrix is larger than approximately 10.5 wt%.

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In-situ CPT of Austenitic and Duplex Stainless Steels on Chloride Containing Environments

Product Number: 51317--9312-SG

ISBN: 9312 2017 CP

Author: Luis GARFIAS-MESIAS

Publication Date: 2017

$20.00

This paper describes a novel methodology to measure the Critical Pitting Temperature (CPT) of a Duplex Stainless Steels (DSS) in artificial seawater based on the Electrochemical Noise (ECN) technique.

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Sulfide-Stress Cracking Threshold Stresses and Operational Limits for the Safe Use of UNS S17400 (17–4PH) in Oilfield Services

Product Number: 51320-14431-SG

Author: Manuel Marya

Publication Date: 2020

$20.00

Stainless steel UNS S17400 (17-4PH) has been successfully used in oilfield services outside the traditional NACE MR0175/ISO 15156 limits for permanent equipment. The exact operational envelops of 17-4PH (HH1150), including the tensile threshold stress, sour gas partial pressure, temperature, and exposure time that enable the crack-free usage of 17-4PH (HH1150) are not well established. For service equipment, NACE MR0175/ISO15156 currently provides exemptions from the tight environmental restrictions of permanent equipment, but instead limits the maximum applied stress to a debatable 60% of the specified minimum yield strength (SMYS). In this investigation, the sulfide stress-corrosion cracking of 17-4PH is revisited through 51 new NACE TM0177 Methods A tests conducted over 240 hours minimum (480hrs in certain cases). Under unrestricted sour gas partial pressures, the threshold tensile stress below which cracking does not occur is between 45% and 60% of the SMYS at ambient temperature. Alloy 17-4PH is also less susceptible to sulfide stress cracking as temperature increases from 70°F (21°C) to 350°F (177°C). Risk of sulfide stress cracking is also greatly mitigated when delta ferrite is controlled. With reduced delta ferrite, as provided by two out of three tested heats, and reverted austenite promoted by both chemical composition and longer aging treatments, no cracking is seen at 60% stress level up to 45psi H2S (0.31MPa); at 45% stress level, this value is increased to 120psi (0.83MPa) based on newly-collected test data.

Products tagged with 'austenite'

03102 LIMITATIONS OF 17- 4 PH METALLURGICAL, MECHANICAL AND CORROSION ASPECTS

High Strength Austenite For Additive Manufacturing

In-situ CPT of Austenitic and Duplex Stainless Steels on Chloride Containing Environments

Sulfide-Stress Cracking Threshold Stresses and Operational Limits for the Safe Use of UNS S17400 (17–4PH) in Oilfield Services

Association for Materials Protection and Performance