ISO 683-4:2016
Heat-treatable steels, alloy steels and free-cutting steels — Part 4: Free-cutting steels
ISO 683-4:2016 gives the technical delivery requirements for semi-finished products (e.g. blooms, billets, slabs), bars and wire rod, manufactured from the free-cutting steels listed in Table 2 and supplied in one of the treatment conditions given for the different types of products in Table 1, rows 2 to 4.
It covers three groups of free-cutting steels for mechanical purposes as listed in Table 2, namely
a) not intended for heat treatment,
b) suitable for case-hardening, and
c) suitable for quenching and tempering.
Free-cutting steels are often used as bright bars. For these products, refer to ISO 683‑18.
In special cases, variations in these technical delivery requirements or additions to them can form the subject of an agreement at the time of enquiry and order (see 5.2 and Annex B).
In addition to ISO 683-4:2016, the general technical delivery requirements of ISO 404 are applicable.
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and designation
4.1 Classification
4.2 Designation
5 Information to be supplied by the purchaser
5.1 Mandatory information
5.2 Options/supplementary or special requirements
5.3 Ordering example
6 Manufacturing process
6.1 General
6.2 Heat treatment and surface condition at delivery
6.2.1 Normal condition at delivery
6.2.2 Particular heat-treatment condition
6.3 Traceability of the cast
7 Requirements
7.1 Chemical composition, hardness, and mechanical properties
7.1.1 General
7.1.2 Chemical composition
7.1.3 Mechanical properties
7.2 Machinability
7.3 Weldability
7.4 Grain size
7.5 Internal soundness
7.6 Surface quality
7.7 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 hardness and mechanical properties
8.3.2 Visual and dimensional inspection
9 Test methods
9.1 Chemical analysis
9.2 Hardness and mechanical tests
9.2.1 Hardness
9.2.2 Mechanical tests
9.3 Retests
10 Marking
Annex A (normative) Ruling sections for mechanical properties
Annex B (normative) Supplementary or special requirements
Annex C (informative) Designation of steels given in this part of ISO 683 and of comparable grades covered in various designation systems
Annex D (informative) Dimensional standards applicable to products complying with this part of ISO 683
Bibliography
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Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Classification and designation
4.1 Classification
4.2 Designation
5 Information to be supplied by the purchaser
5.1 Mandatory information
5.2 Options/supplementary or special requirements
5.3 Ordering example
6 Manufacturing process
6.1 General
6.2 Heat treatment and surface condition at delivery
6.2.1 Normal condition at delivery
6.2.2 Particular heat-treatment condition
6.3 Traceability of the cast
7 Requirements
7.1 Chemical composition, hardness, and mechanical properties
7.1.1 General
7.1.2 Chemical composition
7.1.3 Mechanical properties
7.2 Machinability
7.3 Weldability
7.4 Grain size
7.5 Internal soundness
7.6 Surface quality
7.7 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 hardness and mechanical properties
8.3.2 Visual and dimensional inspection
9 Test methods
9.1 Chemical analysis
9.2 Hardness and mechanical tests
9.2.1 Hardness
9.2.2 Mechanical tests
9.3 Retests
10 Marking
Annex A (normative) Ruling sections for mechanical properties
Annex B (normative) Supplementary or special requirements
Annex C (informative) Designation of steels given in this part of ISO 683 and of comparable grades covered in various designation systems
Annex D (informative) Dimensional standards applicable to products complying with this part of ISO 683
Bibliography