ISO 3690:2012
Welding and allied processes - Determination of hydrogen content in arc weld metal
standard by International Organization for Standardization, 03/15/2012
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About This Item
Full Description
ISO 3690:2011 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 metal.
The techniques specified in ISO 3690:2011 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.
Document History
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ISO 3690:2018
Welding and allied processes - Determination of hydrogen content in arc weld metal- Most Recent
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ISO 3690:2012
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Welding and allied processes - Determination of hydrogen content in arc weld metal- Historical Version
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ISO 3690:2000
Welding and allied processes -- Determination of hydrogen content in ferritic steel arc weld metal- Historical Version
