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Publication date

October 1999

Number of pages

25 p.

Reference

NF EN ISO 642

ICS Codes

77.040.99 Other methods of testing of metals

Classification index

A04-303

Print number

1 - 12/03/2004

International kinship

ISO 642:1999

European kinship

EN ISO 642:1999

Sumary

Steel - Hardenability test by end quenching (Jominy test)

La présente Norme internationale spécifie la méthode de détermination de la trempabilité de l'acier par trempe en bout (essai Jominy), à l'aide d'une éprouvette de 25 mm de diamètre et 100 mm de longueur.NOTE Par accord et pour un domaine donné d'application, l'essai décrit dans la présente Norme internationale peut être remplacé par le calcul de la courbe Jominy conformément à un modèle mathématique accepté (voir annexe C). En cas de litige, l'essai doit être effectué.

Replaced standards (1)

NF A04-303

June 1979

Standard Cancelled

Iron and steel. Physical tests. Jominy hardenability test.

Standard replaced by (1)

NF EN ISO 642

September 2024

Standard Current

Steel - Hardenability test by end quenching (Jominy test)

This document specifies a method for determining the hardenability of steel by end quenching (Jominy test) by using a test piece 25 mm in diameter and at least 100 mm long. By agreement and for a defined field of application, the test described in this document can be replaced by the calculation of the Jominy curve according to an accepted mathematical model.

Table of contents

1 Domaine d'application
1
2 Références normatives
1
3 Principe
1
4 Symboles et désignations
2
5 Forme et préparation des éprouvettes
2
6 Appareillage
3
7 Chauffage et trempe de l'éprouvette
6
8 Préparation pour le mesurage de la dureté après trempe et mesurage
6
9 Expression des résultats
7
10 Rapport d'essai
8
Annexe A (informative) Spécification de la trempabilité d'un produit
10
Annexe B (informative) Information complémentaire à l'article 10
13
Annexe C (informative) Calcul des courbes Jominy
15
Bibliographie
16

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