FD ISO/TR 21704

FD ISO/TR 21704

May 2017
Published document Current

Toughness of round steel link chains - Test with sub-size specimens

ISO/TR 21704:2017 contains investigations and investigation results on toughness of round steel link chains, tested with sub-size specimens.It applies to round steel link chains for hand operated chain hoists of grade TH and VH and for sling chains used for chain slings of grade 8.NOTE 1 Associated International Standards are ISO 16877, ISO 16872 and ISO 3076. In future it is intended to implement the results on toughness derived in this document in new standards.Eleven steels, provided by four manufacturers, were tested to find a test regime on sub-size specimens and requirements on the notch impact toughness values at design temperature which resulted out of the tests. These requirements are adjusted to the toughness values of full size ISO-V specimens.NOTE 2 The requirements are also valid for other cross sections of the chain than round.

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Main informations

Collections

National standards and national normative documents

Publication date

May 2017

Number of pages

62 p.

Reference

FD ISO/TR 21704

ICS Codes

53.020.30   Accessories for lifting equipment

Classification index

E26-003

Print number

1

International kinship

ISO/TR 21704:2017
Sumary
Toughness of round steel link chains - Test with sub-size specimens

ISO/TR 21704:2017 contains investigations and investigation results on toughness of round steel link chains, tested with sub-size specimens.

It applies to round steel link chains for hand operated chain hoists of grade TH and VH and for sling chains used for chain slings of grade 8.

NOTE 1 Associated International Standards are ISO 16877, ISO 16872 and ISO 3076. In future it is intended to implement the results on toughness derived in this document in new standards.

Eleven steels, provided by four manufacturers, were tested to find a test regime on sub-size specimens and requirements on the notch impact toughness values at design temperature which resulted out of the tests. These requirements are adjusted to the toughness values of full size ISO-V specimens.

NOTE 2 The requirements are also valid for other cross sections of the chain than round.

Table of contents
  • 1 Domaine d'application
  • 2 Références normatives
  • 3 Termes et définitions
  • 4 Abréviations
  • 5 Objectif ciblé
  • 6 Fabricants de chaînes
  • 7 Aciers de chaîne soumis à l'essai
  • 8 Équipement, géométrie et échantillonnage des éprouvettes
  • 9 Résultats
  • 10 Extension des éprouvettes
  • 11 Déduction des critères de résilience pour des valeurs caractéristiques déterminées avec des éprouvettes entaillées sous-dimensionnées
  • 12 Valeurs caractéristiques des chaînes à maillons en acier rond des fabricants M3 et M4
  • 13 Valeurs caractéristiques des éprouvettes entaillées sous-dimensionnées, de la température et de l'énergie de choc sur entaille
  • 14 Exigences en matière de valeurs caractéristiques de la résilience des éprouvettes entaillées sous-dimensionnées et super sous-dimensionnées
  • 15 État de la normalisation internationale
  • Annexe A Figures
  • Bibliographie
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