NF EN ISO 4042

NF EN ISO 4042

September 2018
Standard Cancelled

Fasteners - Electroplated coating systems

This document specifies requirements for electroplated coatings and coating systems on steel fasteners. The requirements related to dimensional properties also apply to fasteners made of copper or copper alloys. It also specifies requirements and gives recommendations to minimize the risk of hydrogen embrittlement; see 4.4 and Annex B. It mainly applies to zinc and zinc alloy coating systems (zinc, zinc-nickel, zinc-iron) and cadmium, primarily intended for corrosion protection and other functional properties: — with or without conversion coating; — with or without sealant; — with or without top coat; — with or without lubricant (integral lubricant and/or subsequently added lubricant). Specifications for other electroplated coatings and coating systems (tin, tin-zinc, copper-tin, copper-silver, copper, silver, copper-zinc, nickel, nickel-chromium, copper-nickel, copper-nickel-chromium) are included in this document only for dimensional requirements related to fasteners with ISO metric threads. This document applies to bolts, screws, studs and nuts with ISO metric thread, to fasteners with non-ISO metric thread, and to non-threaded fasteners such as washers, pins, clips and rivets. Information for design and assembly of coated fasteners is given in Annex A. This document does not specify requirements for properties such as weldability or paintability. NOTE Other International Standards specify differing electroplating processes. For electroplating of fasteners, the requirements of this document apply, unless otherwise agreed.

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Main informations

Collections

National standards and national normative documents

Publication date

September 2018

Number of pages

70 p.

Reference

NF EN ISO 4042

ICS Codes

21.060.01   Fasteners in general

Classification index

E25-009

Print number

1

International kinship

European kinship

EN ISO 4042:2018
Sumary
Fasteners - Electroplated coating systems

This document specifies requirements for electroplated coatings and coating systems on steel fasteners. The requirements related to dimensional properties also apply to fasteners made of copper or copper alloys.

It also specifies requirements and gives recommendations to minimize the risk of hydrogen embrittlement; see 4.4 and Annex B.

It mainly applies to zinc and zinc alloy coating systems (zinc, zinc-nickel, zinc-iron) and cadmium, primarily intended for corrosion protection and other functional properties:

— with or without conversion coating;

— with or without sealant;

— with or without top coat;

— with or without lubricant (integral lubricant and/or subsequently added lubricant).

Specifications for other electroplated coatings and coating systems (tin, tin-zinc, copper-tin, copper-silver, copper, silver, copper-zinc, nickel, nickel-chromium, copper-nickel, copper-nickel-chromium) are included in this document only for dimensional requirements related to fasteners with ISO metric threads.

This document applies to bolts, screws, studs and nuts with ISO metric thread, to fasteners with non-ISO metric thread, and to non-threaded fasteners such as washers, pins, clips and rivets.

Information for design and assembly of coated fasteners is given in Annex A.

This document does not specify requirements for properties such as weldability or paintability.

NOTE Other International Standards specify differing electroplating processes. For electroplating of fasteners, the requirements of this document apply, unless otherwise agreed.

Replaced standards (1)
NF EN ISO 4042
November 1999
Standard Cancelled
Fasteners - Electroplated coatings

<p> La présente Norme internationale spécifie les caractéristiques dimensionnelles des éléments de fixation en acier ou en alliage de cuivre, avec revêtement électrolytique. Elle spécifie les épaisseurs de revêtement et donne des recommandations pour la non-fragilisation par l'hydrogène des éléments de fixation présentant une résistance à la traction ou une dureté élevée et pour les éléments de fixation ayant subi un durcissement superficiel.La présente Norme internationale traite principalement du revêtement électrolytique des éléments de fixation filetés, mais elle peut également s'appliquer à d'autres pièces filetées. Pour l'application aux vis qui forment leur propre filetage par déformation ou par enlèvement de matière.Les spécifications données dans la présente Norme internationale peuvent également être appliquées aux pièces non filetées comme des rondelles et des goupilles. </p>

Standard replaced by (1)
NF EN ISO 4042
June 2022
Standard Current
Fasteners - Electroplated coating systems

<p>This document specifies requirements for steel fasteners with electroplated coatings and coating systems. The requirements related to dimensional properties also apply to fasteners made of copper or copper alloys.</p> <p>It also specifies requirements and gives recommendations to minimize the risk of hydrogen embrittlement, see 4.4 and Annex B.</p> <p>It mainly applies to fasteners with zinc and zinc alloy coating systems (zinc, zinc-nickel, zinc-iron) and cadmium, primarily intended for corrosion protection and other functional properties:</p> <p>—    with or without conversion coating,</p> <p>—    with or without sealant,</p> <p>—    with or without top coat,</p> <p>—    with or without lubricant (integral lubricant and/or subsequently added lubricant).</p> <p>Specifications for other electroplated coatings and coating systems (tin, tin-zinc, copper-tin, copper-silver, copper, silver, copper-zinc, nickel, nickel-chromium, copper-nickel, copper-nickel-chromium) are included in this document only for dimensional requirements related to fasteners with ISO metric threads.</p> <p>The requirements of this document for electroplated fasteners take precedence over other documents  dealing with electroplating.</p> <p>This document applies to steel bolts, screws, studs and nuts with ISO metric thread, to other threaded fasteners and to non-threaded fasteners such as washers, pins, clips and rivets.</p> <p>NOTE       Electroplating is also applied to stainless steel fasteners, e.g. for the purpose of lubrication in order to avoid galling.</p> <p>Information for design and assembly of coated fasteners is given in Annex A.</p> <p>This document does not specify requirements for properties such as weldability or paintability.</p>

Table of contents
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  • Avant-propos
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Caractéristiques générales du revêtement
  • 5 Protection contre la corrosion et essais
  • 6 Caractéristiques dimensionnelles et essais
  • 7 Caractéristiques mécaniques et physiques, et essais
  • 8 Application des essais
  • 9 Système de désignation
  • 10 Spécifications pour la commande d'un revêtement électrolytique
  • 11 Conditions de stockage
  • Annexe A (informative) Conception et assemblage des fixations revêtues
  • Annexe B (informative) Considérations relatives à la fragilisation par l'hydrogène
  • Annexe C (informative) Protection contre la corrosion pour les revêtements de zinc avec chromatation
  • Annexe D (informative) Épaisseur de revêtement et jeu dans le filetage pour les filetages métriques ISO
  • Annexe E (informative) Systèmes de revêtement soumis à essai conformément à l'ISO 9227, BS - Évaluation de l'agressivité de l'enceinte pour l'essai au brouillard salin neutre
  • Annexe F (informative) Codes de désignation obsolètes pour les systèmes de revêtements électrolytiques des fixations, selon l'ISO 4042:1999
  • Bibliographie
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