NF EN ISO 3690

NF EN ISO 3690

September 2018
Standard Current

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

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.

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Main informations

Collections

National standards and national normative documents

Publication date

September 2018

Number of pages

31 p.

Reference

NF EN ISO 3690

ICS Codes

25.160.20   Welding consumables
25.160.40   Welded joints and welds

Classification index

A81-305

Print number

1

International kinship

ISO 3690:2018

European kinship

EN ISO 3690:2018
Sumary
Welding and allied processes - Determination of hydrogen content in arc weld metal

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.

Replaced standards (1)
NF EN ISO 3690
June 2012
Standard Cancelled
Welding and allied processes - Determination of hydrogen content in arc weld metal

Le présent document spécifie le mode opératoire d'échantillonnage et d'analyse pour la détermination de l'hydrogène diffusible et résiduel dans le métal fondu martensitique, bainitique et ferritique résultant du soudage de ces aciers avec des procédés de soudage à l'arc avec métal d'apport.

Table of contents
  • Avant-propos
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Principe
  • 5 Modes opératoires d'essai
  • Annexe A (informative) Recommandations et limitations concernant les anciennes méthodes de mesure utilisant du mercure
  • Annexe B (informative) Recommandations et limitations concernant les anciennes méthodes de mesure utilisant de la glycérine
  • Annexe C (informative) Exactitude et reproductibilité
  • Bibliographie
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