AMPP Store - Products tagged with 'pre'

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Comparison of Pitting and Crevice Corrosion - The Effect of Alloying Elements

Product Number: 51317--8975-SG

ISBN: 8975 2017 CP

Author: Brian DeForce

Publication Date: 2017

$20.00

Corrosion resistance of stainless steels and nickel alloys is due to alloying elements. The most important elements are Cr, Mo, N and sometimes W. This paper compares the effect of these elements in pitting and crevice corrosion.

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Effect of Heat Treatment and Manufacturing Method on the Susceptibility to Hydrogen Induced Stress Cracking of UNS N06625

Product Number: 51324-20899-SG

Author: Eivind Bruun Thorstensen; Atle Helge Qvale; Vebjørn Andresen ; Roy Johnsen; Paal Bratland

Publication Date: 2024

$40.00

This paper presents results obtained from examining the effect of heat treatment and production method on the hydrogen induced stress cracking (HISC) susceptibility of UNS N06625 (Alloy 625). Five different versions of Alloy 625 were examined: Hot forged material heat treated at 920 °C, 1010 °C and 1100 °C respectively, material produced by hot isostatic pressing (HIP) and material that has been solution annealed and strain hardened (cold worked) at a temperature below secondary phase formation. The different versions of Alloy 625 were initially characterized by identifying the critical pitting temperature (CPT) by use of a modified ASTM G48 Method C test. Resistance to Hydrogen Embrittlement (HE) has been examined by use of stepwise loading of tensile specimens in a hydrogen charging environment in CortestTM proof rings, followed by fractography characterization and microstructural examination by use of Optical Light Microscope (OLM) and Scanning Electron Microscope (SEM). The hot forged and the HIP’ed versions of Alloy 625 that subsequently were heat treated, were found to be susceptible to HISC. The evaluation was based on a decrease in strength and ductility, as well as brittle fracture surfaces and secondary cracking on the samples’ outer surface. Among the hot forged and heat-treated versions, the samples heat treated at 1010°C were found to be the most susceptible to HISC, while (solution) heat treatment at 1100°C resulted in the lowest HISC susceptibility amongst the hot forged and heat-treated qualities. The solution annealed (1150 °C) and cold worked version showed a higher resistance to HISC, as no reduction in fracture strength, nor any secondary cracking were observed. The amount of grain boundary precipitations was found to be the main factor influencing the HISC susceptibility, where an increased amount of grain boundary precipitations led to higher susceptibility. The effect of grain size on the HISC susceptibility of samples charged with hydrogen were also considered, and the results indicate that larger grains have a beneficial effect on the ductility.

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Sanicro 35, a New Super Austenitic Stainless Steel for Demanding Wet Corrosive Applications

Product Number: MPWT19-14327

Author: Jonas Höwing

Publication Date: 2019

$0.00

A new super austenitic stainless steel has been developed for use in highly corrosive wet environments.
The new alloy, Alloy 35Mo, has the general chemical composition 27Cr-35Ni-6.5Mo-0.28N and PRE>52,
suggesting high resistance towards chloride induced localized corrosion. The Alloy 35Mo has excellent
corrosion resistance in chloride bearing environments, and has also shown surprising mechanical
properties with a combination of high yield strength, excellent ductility and low hardness. The main
applications for the new grade will initially be heat exchanger tubing, small dimension piping and hydraulic
& instrumentation tubing. Target industries are refineries, chemical and petrochemical plants and offshore
installations. This paper discusses Alloy35Mo, its properties, and a comparison with existing,
competing grades

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TM0211-2011-SG “Durability Test for Copper/Copper Sulfate Permanent Reference Electrodes for Direct Burial Applications”

Product Number: 21257-SG

ISBN: 1-57590-247-8

Publication Date: 2011

$109.00

Test method to measure properties and stability of Cu/CuSO4 permanent reference electrodes (PREs) under environmental stress. Specifically measures migration of CuSO4 from - and chloride into - the PRE.

Products tagged with 'pre'

Comparison of Pitting and Crevice Corrosion - The Effect of Alloying Elements

Effect of Heat Treatment and Manufacturing Method on the Susceptibility to Hydrogen Induced Stress Cracking of UNS N06625

Sanicro 35, a New Super Austenitic Stainless Steel for Demanding Wet Corrosive Applications

TM0211-2011-SG “Durability Test for Copper/Copper Sulfate Permanent Reference Electrodes for Direct Burial Applications”

Association for Materials Protection and Performance