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ISO 3690:2018

Current Revision

Welding and allied processes - Determination of hydrogen content in arc weld metal

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This document specifies the sampling and analytical procedure for the determination of diffusible hydrogen in martensitic, bainitic, and ferritic steel weld metal arising from the welding of such steels using arc welding processes with filler material.

The techniques specified in this document include collection of diffusible hydrogen via displacement of mercury or collection into a headspace filled with an inert gas such as argon. The amount of hydrogen collected is determined by measuring the displaced volume in the former and by, for example, thermal conductivity in the latter.

The temperature for collection of diffusible hydrogen is controlled to avoid thermal activation of non-diffusible hydrogen.

NOTE Recommendations and restrictions in regard to older methods of measurement using glycerine are given in Annex B for any comparison work to these older methods.


SDO ISO: International Organization for Standardization
Document Number ISO 3690
Publication Date Not Available
Language en - English
Page Count
Revision Level
Supercedes
Committee IIW
Publish Date Document Id Type View
Not Available ISO 3690:2018 Revision