ISO INTERNATIONAL STANDARD 683-2 Second edition 2016-07-01 Heat-treatable steels, alloy steels and free-cutting steels - Part 2: Alloy steels for quenching and tempering Aciers pour traitement thermique, aciers allies et aciers pour décolletage- Partie 2: Aciers alliés pour trempe et revenu Reference number IS0 683-2:2016(E) ISO @IS0 2016 IS0 683-2:2016(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... 4.2 Designation .n. 3 5 Information to be supplied by the purchaser. 3 5.1 Mandatory informations 5.2 Options and/or supplementary or special requirements, 5.3 Ordering example.. 6. Manufacturing process 6.1 General.. 6.2 Deoxidation.. 6.3 Heat-treatment condition and surface condition at delivery 6.3.1 Heat-treatrnent condition.. 6.3.2 Particular surface conditions. 6.4 Traceability of the cast. 7 Requirements 5 7.1 Chemical composition, mechanical properties and hardenability 7.1.1 General 7.1.2 Chemical composition.. 5 7.1.3 Mechanical properties 7.1,4 Hardenability.. 7.1.5 Surface hardness. 5 7.2 Machinability 7.3 Cold shearability. 7.4 Grainsize 7.5 Non-metallic inclusions. 6 7.5.1 Microscopic inclusions 7.5.2 Macroscopic inclusions. 7.6 Internal soundness. 7.7 Surface quality.. 7.8 Decarburization 7.9 Shape, dimensions and tolerances. 8 Inspection . 8.1 Testing procedures and types of documents .. 8.2 Frequency of testing... 8.3 Specific inspection and testing.. 8.3.1 Verification of the hardenability, hardness and mechanical properties 8.3.2 Visual and dimensional inspection...... 8 9 Test methods. 8 9.1 Chemical analysis. 8 9.2 Mechanical tests. 8 9.2.1 Tensiletest 8 9.2.2 Impacttest 8 9.3 Hardness and hardenability tests. 8 9.3.1 Hardness in treatment conditions +A and +S. 8 9.3.2 Verification of hardenability 9.3.3 Surface hardnes... 9.4 Retests .. @ IS0 2016 - All rights reserved ili IS0 683-2:2016(E) 10 Marking. .9 Annex A (normative) Ruling sections for mechanical properties. .31 Annex B (normative) Supplementary or special requirements .35 Annex C (informative) Designation of steels given in this part of Is0 683 and of comparable grades covered in various designation systems. 37 Annex D (informative) Dimensional standards applicable to products complying with this part of IS0 683 .39 Bibliography .40 iy @IS02016-Allrightsreserved