Problem with Nickel Alloy 686 Closure Welds

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F11%3A00197021" target="_blank" >RIV/68407700:21220/11:00197021 - isvavai.cz</a>

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Problem with Nickel Alloy 686 Closure Welds

Original language description

There are a variety of applications where we are required to join carbon steels or nickel alloy 625 (see composition in following table) to duplex (22 Cr) or super duplex (25 Cr) stainless steels. In years past, Nickel alloy 625 was used for joining these dissimilar materials. However; several years ago, this practice was brought into question. The source of the original concern is not known, but it is contended that the Nb in the Nickel alloy 625 will combine with the nitrogen in the duplex stainless steel and form brittle niobium nitrides. In certain applications, we use niobium free nickel alloy weld consumables when a nickel alloy was needed for welding duplex stainless steels.

Czech name

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Czech description

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Type

V_souhrn - Summary research report

CEP classification

JJ - Other materials

OECD FORD branch

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Project

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Continuities

N - Vyzkumna aktivita podporovana z neverejnych zdroju

Publication year

2011

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Number of pages

102

Place of publication

Praha

Publisher/client name

Texas Institute of Science (TxIS)

Version

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