ISO 683-17:2023
Heat-treatable steels, alloy steels and free-cutting steels — Part 17: Ball and roller bearing steels
This document specifies the technical delivery requirements for five groups of wrought ball and roller bearing steels as listed in Table 3, namely
— through-hardening bearing steels (steels with about 1 % C and 1 % to 2 % Cr),
— case-hardening bearing steels,
— induction-hardening bearing steels (unalloyed and alloyed),
— stainless bearing steels, and
— high-temperature bearing steels.
This document is applicable to the products and heat-treatment conditions given in Table 1 and the surface conditions given in Table 2.
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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
6 Manufacturing process
6.1 General
6.2 Deoxidation, vacuum degassing and hydrogen removal
6.3 Heat-treatment and surface condition at delivery
6.3.1 Heat-treatment condition
6.3.2 Particular surface conditions
6.3.3 Traceability of the cast
7 Requirements
7.1 General
7.2 Chemical composition
7.3 Hardenability
7.4 Hardness
7.5 Microstructure
7.5.1 Austenitic grain size of case-hardening and induction-hardening bearing steels
7.5.2 Spheroidization and distribution of carbides
7.5.3 Structure of case-hardening steels in the condition +FP
7.6 Non-metallic inclusions
7.6.1 Microscopic inclusions
7.6.2 Macroscopic inclusions
7.7 Internal soundness
7.8 Surface quality
7.9 Shape, dimensions and tolerances
8 Inspection
8.1 Testing procedures and types of inspection documents
8.2 Frequency of testing
8.3 Specific inspection and testing
8.3.1 Verification of the hardenability and hardness
8.3.2 Inspection of the surface quality
8.3.3 Dimensional and shape inspection
9 Test methods
9.1 Chemical analysis
9.2 Hardness and hardenability tests
9.2.1 Hardness
9.2.2 Verification of hardenability
9.2.3 Retests
10 Marking
Annex A (normative) Supplementary or special requirements
Annex B (informative) Designations of the steels given in Tables 3, 5 and 6 and of comparable grades covered in various designation systems
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
6 Manufacturing process
6.1 General
6.2 Deoxidation, vacuum degassing and hydrogen removal
6.3 Heat-treatment and surface condition at delivery
6.3.1 Heat-treatment condition
6.3.2 Particular surface conditions
6.3.3 Traceability of the cast
7 Requirements
7.1 General
7.2 Chemical composition
7.3 Hardenability
7.4 Hardness
7.5 Microstructure
7.5.1 Austenitic grain size of case-hardening and induction-hardening bearing steels
7.5.2 Spheroidization and distribution of carbides
7.5.3 Structure of case-hardening steels in the condition +FP
7.6 Non-metallic inclusions
7.6.1 Microscopic inclusions
7.6.2 Macroscopic inclusions
7.7 Internal soundness
7.8 Surface quality
7.9 Shape, dimensions and tolerances
8 Inspection
8.1 Testing procedures and types of inspection documents
8.2 Frequency of testing
8.3 Specific inspection and testing
8.3.1 Verification of the hardenability and hardness
8.3.2 Inspection of the surface quality
8.3.3 Dimensional and shape inspection
9 Test methods
9.1 Chemical analysis
9.2 Hardness and hardenability tests
9.2.1 Hardness
9.2.2 Verification of hardenability
9.2.3 Retests
10 Marking
Annex A (normative) Supplementary or special requirements
Annex B (informative) Designations of the steels given in Tables 3, 5 and 6 and of comparable grades covered in various designation systems
Bibliography