Norm

NEN-EN-ISO 3690:2009 Ontw. en

Lassen en verwante processen - Bepaling van het waterstofgehalte in ferritisch booglasmetaal

  • Deze norm is ingetrokken sinds 03-04-2012

31,83

Over deze norm

Status Ingetrokken
Aantal pagina's 26
Commissie Lassen en verwante processen
Gepubliceerd op 01-07-2009
Taal Engels
This International Standard specifies the sampling and analytical procedure for the determination of diffusible and residual hydrogen in weld metal of martensitic, bainitic, and ferritic weld metal arising from the welding of such steels using arc welding processes with filler metal. The techniques described in this International Standard 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 thermal conductivity in the latter. The temperature for collection of diffusible hydrogen is controlled to avoid thermal activation of non-diffusible hydrogen. Furthermore, with application of a rapid method (short period of collection time), the measurement of the diffusible hydrogen amount can be carried out at elevated temperatures.

Details

ICS-code 25.160.40
Nederlandse titel Lassen en verwante processen - Bepaling van het waterstofgehalte in ferritisch booglasmetaal
Engelse titel Welding and allied processes - Determination of hydrogen content in arc weld metal
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