ISO 6934-4:2020
Steel for the prestressing of concrete — Part 4: Strand
This document specifies requirements for steel strand which has been given a stress-relieving heat treatment according to the general requirements specified in ISO 6934-1. This document covers 10 grades of steel strand for use in prestressed concrete construction; each strand can contain either 2, 3, 7 or 19 individual wires. In case of any conflict between the requirements of this document and ISO 6934-1, the requirements of document prevail.
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Foreword
1 Scope
2 Normative reference
3 Terms and definitions
4 Conditions of manufacture
4.1 Steel
4.2 Stress-relieving heat treatment
4.3 Compacted strand
4.4 Welds
4.4.1 2-wire and 3-wire strand
4.4.2 7-wire and 19-wire strand
4.5 Cracks
4.6 Finishing and appearance
5 Strand configuration
6 Properties
6.1 Dimensions, masses and strength of strand
6.2 Elongation and ductility
6.3 Relaxation
6.4 Fatigue
6.5 Stress corrosion
6.6 Deflected tensile test
7 Designation
8 Delivery conditions
8.1 General
8.2 Reel dimension
8.3 Curvature of strand
Annex A (informative) Considerations on stress corrosion
Annex B (informative) Deflected tensile strength
Bibliography
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Foreword
1 Scope
2 Normative reference
3 Terms and definitions
4 Conditions of manufacture
4.1 Steel
4.2 Stress-relieving heat treatment
4.3 Compacted strand
4.4 Welds
4.4.1 2-wire and 3-wire strand
4.4.2 7-wire and 19-wire strand
4.5 Cracks
4.6 Finishing and appearance
5 Strand configuration
6 Properties
6.1 Dimensions, masses and strength of strand
6.2 Elongation and ductility
6.3 Relaxation
6.4 Fatigue
6.5 Stress corrosion
6.6 Deflected tensile test
7 Designation
8 Delivery conditions
8.1 General
8.2 Reel dimension
8.3 Curvature of strand
Annex A (informative) Considerations on stress corrosion
Annex B (informative) Deflected tensile strength
Bibliography