EN ISO 683-7:2024

SLOVENSKI STANDARD
01-september-2024
Toplotno obdelana, legirana in avtomatna jekla -7. del: Svetli izdelki iz nelegiranih
in legiranih jekel (ISO 683-7:2023)
Heat-treatable steels, alloy steels and free-cutting steels - Part 7: Bright products of non-
alloy and alloy steels (ISO 683-7:2023)
Für eine Wärmebehandlung bestimmte Stähle, legierte Stähle und Automatenstähle -
Teil 7: Blankstahlerzeugnisse aus unlegierten und legierten Stählen (ISO 683-7:2023)
Aciers pour traitement thermique, aciers alliés et aciers pour décolletage - Partie 7:
Produits en aciers non alliés et alliés transformés à froid (ISO 683-7:2023)
Ta slovenski standard je istoveten z: prEN ISO 683-7
ICS:
77.140.10 Jekla za toplotno obdelavo Heat-treatable steels
77.140.20 Visokokakovostna jekla Stainless steels
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 683-7
First edition
2023-11
Heat-treatable steels, alloy steels and
free-cutting steels —
Part 7:
Bright products of non-alloy and alloy
steels
Aciers pour traitement thermique, aciers alliés et aciers pour
décolletage —
Partie 7: Produits en aciers non alliés et alliés transformés à froid
Reference number
ISO 683-7:2023(E)
ISO 683-7:2023(E)
© ISO 2023
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Published in Switzerland
ii
ISO 683-7:2023(E)
Contents Page
Foreword .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Classification and designation . 3
4.1 Classification . 3
4.2 Designation . 3
5 Information to be supplied by the purchaser . 3
5.1 Mandatory information . 3
5.2 Options/Supplementary or special requirements . 4
5.3 Ordering example. 4
6 Manufacturing process . 5
6.1 General . 5
6.2 Treatment and surface condition at delivery . 5
6.2.1 Treatment condition . 5
6.2.2 Surface conditions . 5
6.3 Traceability of the cast . 5
7 Requirements . 5
7.1 General . 5
7.2 Chemical composition . 5
7.3 Mechanical properties . 6
7.4 Hardenability . 6
7.5 Machinability . 6
7.6 Grain size . 7
7.7 Non-metallic inclusions . 7
7.7.1 Microscopic inclusions . 7
7.7.2 Macroscopic inclusions . 7
7.8 Internal soundness . 7
7.9 Decarburization . . 7
7.10 Shape, dimensions and tolerances . 7
7.11 Surface quality . 8
8 Inspection . 8
8.1 Testing procedures and types of documents. 8
8.2 Frequency of testing . 9
8.3 Specific inspection and testing . 10
8.3.1 Verification of the hardenability, hardness and mechanical properties . 10
8.3.2 Visual and dimensional inspection . 11
9 Test methods .11
9.1 Chemical analysis . 11
9.2 Mechanical tests . 11
9.2.1 Tensile test . 11
9.2.2 Impact test . 11
9.3 Hardness and hardenability tests . 11
9.3.1 Hardness in treatment conditions +A and +FP . 11
9.3.2 Verification of hardenability .12
9.4 Verification of dimensions .12
9.5 Retests . 12
10 Marking . .12
Annex A (informative) Steel grades and chemical composition according to ISO 630-2,
ISO 683-1, ISO 683-2, ISO 683-3 and ISO 683-4 .39
iii
ISO 683-7:2023(E)
Annex B (normative) Determination of the diameter of the equivalent ruling section for
mechanical properties.45
Annex C (normative) Supplementary or special requirements .48
Annex D (normative) Methods for evaluating straightness .50
Annex E (informative) Designation of steels given in this document and of comparable
grades covered in various designation systems .51
Bibliography .55
iv
ISO 683-7:2023(E)
Foreword
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