Standard
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AS/NZS 4671:2019
[Current]Steel for the reinforcement of concrete
The objective of the Standard is to provide materials specifications for steel bars and welded mesh used to reinforce concrete structures that have been designed in accordance with standards such as AS 3600, Concrete structures, or NZS 3101.1, Concrete structures standard, Part 1. This Standard has also been referenced by other design standards.
Published: 13/12/2019
Pages: 49
Table of contents
Cited references
Content history
Table of contents
Header
About this publication
Preface
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Notation
5 Classification and designation
5.1 Classification
5.2 Standard grades
5.3 Designation of bar and coil
5.4 Designation of welded mesh
6 Manufacturing methods
6.1 Production
6.2 Processing
6.2.1 Bars and coils
6.2.2 Mesh
6.3 Manufacturing control
7 Chemical, mechanical and geometric requirements
7.1 Chemical composition and weldability
7.2 Mechanical properties
7.2.1 General
7.2.2 Tensile properties
7.2.3 Bending and rebending properties
7.2.4 Fatigue strength
7.2.5 Shear strength of joints in mesh
7.3 Geometric properties
7.3.1 Diameters, cross-sectional areas and masses
7.3.2 Length of bars
7.3.3 Straightness tolerance of bars
7.3.4 Coil size
7.4 Surface geometry
7.4.1 General
7.4.2 Geometry of ribs and indentations
7.4.2.1 General
7.4.2.2 Transverse ribs or indentations
7.4.2.3 Longitudinal ribs
7.4.2.4 Relative projected area
7.5 Form and dimensions of mesh
7.5.1 General
7.5.2 Commonly available mesh
7.5.3 Minimum number of bars
7.5.4 Bar arrangement
7.5.5 Purpose-made mesh
7.5.6 Pitch
7.5.7 Sheet size tolerances
7.5.8 Welds
7.5.9 Deemed-to-satisfy rib or indentation geometry
8 Quality of finished bar
9 Demonstrating product conformity
10 Identification and certificates
10.1 Identification of reinforcing steels
10.2 Identification of the steel producer
10.3 Labelling of reinforcing steel for supply
10.4 Product conformity reports and certificates for reinforcing steels
Appendix A
A.1 Scope
A.2 Type testing
A.2.1 General
A.2.2 Minimum sampling and testing plan
A.3 Factory production control
A.3.1 General
A.3.2 Equipment
A.3.2.1 Weighing and measuring equipment
A.3.2.2 Maintenance and inspection
A.3.3 Raw materials
A.3.4 Manufacturing control
Appendix B
B.1 Scope and application
B.1.1 Scope
B.1.2 Application
B.2 Sampling and testing frequency
B.3 Evaluation and conformance of batch quality parameters
B.3.1 Tensile parameters
B.3.1.1 Batch parameters
B.3.1.2 Batch conformance
B.3.2 Other parameters
B.3.2.1 Chemical composition
B.3.2.2 Shear strength of joints in mesh
B.3.2.3 Bend and rebend suitability
B.3.2.4 Mass per unit length
B.3.2.5 Surface geometry
B.4 Action on non-conforming batches
B.5 Determination of LTQ level
B.5.1 General
B.5.2 Evaluation of results
B.5.2.1 Estimation of population parameters
B.5.3 Conformance to LTQ levels
B.6 Material not covered by LTQ level
B.6.1 General
B.6.2 Extent of sampling and testing
B.6.3 Properties to be tested
B.6.4 Evaluation of results
B.6.4.1 Statistical assessment
B.6.4.2 Measured properties attributes
Appendix C
C.1 General
C.2 Mechanical properties
C.2.1 General
C.2.2 Tensile properties — Uniform elongation
C.3 Geometric properties
C.3.1 Rib geometry
C.3.1.1 Height of transverse ribs
C.3.1.2 Circumferential spacing of transverse ribs
C.3.1.3 Longitudinal spacing of transverse ribs
C.3.1.4 Calculation of the relative projected rib area (fR)
C.3.2 Indentation geometry
C.3.2.1 Depths of transverse indentations
C.3.2.2 Circumferential spacing of transverse indentations
C.3.2.3 Longitudinal spacing of transverse indentations
C.3.2.4 Calculation of the relative projected indentation area (fP)
C.3.3 Mass per unit length of reinforcing steels
C.3.3.1 General
C.3.3.2 Test specimens
C.3.3.3 Procedure
C.3.3.4 Alternative procedure for plain round bar
C.4 Bond test for profile designation
C.4.1 Objective
C.4.2 Test pieces
C.4.3 Test prism or cylinder and apparatus
C.4.4 Procedure
C.4.5 Free-end slip
C.4.6 Test report
C.5 Mesh weld shear strength
Appendix D
D.1 Information to be supplied by the purchaser
D.2 Inspection
Appendix E
E.1 Long term quality (LTQ) data
E.2 Long-term quality distributions
E.3 Single test results versus long-term quality test results
E.4 Test certificates
Appendix F
F.1 Introduction
F.2 Product conformity
F.3 Selection of test samples in decoiled product
Bibliography
Cited references in this standard
[Current]
General requirements for the competence of testing and calibration laboratories
[Current]
Methods for the analysis of iron and steel, Part 1: Sampling iron and steel for chemical analysis
[Current]
Metallic materials - Tensile testing - Part 1: Method of test at room temperature
Content history
[Superseded]
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