GB/T 1499.1-2017 English PDF (GBT1499.1-2017)

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GB/T 1499.1-2017: Steel for the reinforcement of concrete -- Part 1: Hot rolled plain bars
GB/T 1499.1-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.60
H 44
Replacing GB/T 1499.1-2008
Steel for the reinforcement of concrete -
Part 1. Hot rolled plain bars
(ISO 6935-1.2007, Steel for the reinforcement of concrete - Part 1. Plain bars, NEQ)
ISSUED ON. DECEMBER 29, 2017
IMPLEMENTED ON. SEPTEMBER 1, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the PRC;
Standardization Administration of the PRC.
Table of Contents
Foreword . 3 
1 Scope .. 5 
2 Normative references . 5 
3 Terms and definitions . 6 
4 Designation . 6 
5 Ordering content . 7 
6 Dimensions, shape, weight, and permissible deviations .. 7 
7 Technical requirements . 10 
8 Test methods . 11 
9 Inspection rules .. 13 
10 Packaging, marking, and quality certificate . 14 
Appendix A (Normative) Rules for characteristic value inspection .. 15 
Foreword
GB/T 1499 “Steel for the reinforcement of concrete” is divided into three parts.
- Part 1. Hot rolled plain bars;
- Part 2. Hot rolled ribbed bars;
- Part 3. Welded fabric.
This Part is Part 1 of GB/T 1499.
This Part is drafted in accordance with the rules given in GB/T 1.1-2009.
This Part replaces GB/T 1499.1-2008 “Steel for the Reinforcement of Concrete
- Part 1. Hot Rolled Plain Bars”. As compared with GB/T 1499.1-2008, the main
changes are as follows.
- ADD some normative references;
- DELETE HPB235 designation and its related technical requirements;
- ADJUST the upper limit of S element content to 0.045%, and DELETE the
related technical requirements for residual elements in steel;
- DELETE 6.5 mm specification product and its related technical
requirements;
- ADD the requirement for bending per meter of straight bars;
- TIGHTEN weight deviation;
- ADD the measurement provisions when yield strength is not evident;
- ADD the provision that re-inspection is not permitted when weight deviation
is unacceptable;
- ADD the provision that protruding factory name and other surface markings
can be added on the surface of bars;
- DELETE Appendix A (normative appendix) “Method for determination of
total elongation of bars under the maximum force”.
This Part uses the redraft law to refer to ISO 6935-1.2007 “Steel for the
reinforcement of concrete - Part 1. Plain bars” for development. The degree of
consistency with ISO 6935-1.2007 is not equivalent.
Steel for the reinforcement of concrete -
Part 1. Hot rolled plain bars
1 Scope
This Part of GB/T 1499 specifies the terms and definitions, designation,
ordering content, dimensions, shape, weight and permissible deviation,
technical requirements, test methods, inspection rules, packaging, marking,
and quality certificate of hot rolled plain bars to be used as reinforcement in
concrete (hereafter known as bars for short).
This Part is applicable to hot rolled straight and coil plain bars to be used as
reinforcement in concrete.
This Part is not applicable to the recycled bars produced by rerolling of finished
steel.
2 Normative references
The following documents are indispensable for the application of this document.
For the dated references, only the versions with the dates indicated are
applicable to this document. For the undated references, the latest version
(including all the amendments) are applicable to this document.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel
Products
GB/T 223.5 Steel and iron - Determination of acid-soluble silicon and total
silicon content - Reduced molybdosilicate spectrophotometric method
GB/T 223.59 Iron, steel and alloy - Determination of phosphorus content -
Bismuth phosphomolybdate blue spectrophotometric method and antimony
phosphomolybdate blue spectrophotometric method
GB/T 223.63 Methods for chemical analysis of iron, steel and alloy - The
sodium (potassium) periodate photometric method for the determination of
manganese content
GB/T 223.85 Steel and iron - Determination of sulfur content - Infrared
absorption method after combustion in an induction furnace
GB/T 223.86 Steel and iron - Determination of total carbon content - Infrared
absorption method after combustion in an induction furnace
GB/T 2101 General requirement of acceptance, packaging, marking and
certification for section steel
GB/T 4336 Carbon and low-alloy steel - Determination of multi-element
contents - Spark discharge atomic emission spectrometric method (routine
method)
GB/T 17505 Steel and steel products - General technical delivery
requirements
GB/T 20066 Steel and iron - Sampling and preparation of samples for the
determination of chemical composition
GB/T 20123 Steel and iron - Determination of total carbon and sulfur content
- Infrared absorption method after combustion in an induction furnace
(routine method)
GB/T 20125 Low-alloy steel - Determination of multi-element contents -
Inductively coupled plasma atomic emission spectrometric method
GB/T 28900 Test methods of steel for reinforcement of concrete
YB/T 081 Rule for rounding off of numerical values and judgement of testing
values for technical standards of metallurgy
3 Terms and definitions
The following terms and definitions are applicable to this document.
3.1 Hot rolled plain bars
The finished bars which are shaped by hot rolling, and of which the cross
section is usually round and the surface is plain.
3.2 Characteristic value
The quantile value corresponding to a prescribed probability in an unlimited
number of inspections.
4 Designation
4.1 The characteristic value of yield strength of the bars is Grade 300.
8.5 Rounding off and judgment of numerical values
The rounding off and judgement of numerical values of inspection results shall
comply with the provisions of YB/T 081.
9 Inspection rules
9.1 Classification of inspection
The inspection of bar is divided into characteristic value inspection and delivery
inspection.
9.2 Characteristic value inspection
9.2.1 The characteristic value inspection applies to the following circumstances.
a) Supplier inspection of product quality control;
b) Inspection requested by the demander and agreed upon by the supplier
and the demander;
c) Third-party product certification and arbitration inspection.
9.2.2 The characteristic value inspection shall be carried out in accordance with
the rules given in Appendix A.
9.3 Delivery inspection
9.3.1 Scope of application
The delivery inspection is applicable to the inspection of lot acceptance of bars.
9.3.2 Lot grouping rules
9.3.2.1 The bars shall be checked and accepted in lots. Each lot shall be made
up of the bars of the same designation, the same furnace pot number, and the
same dimensions. The weight of each lot is usually no more than 60 t. For the
part in excess of 60 t, for each additional 40 t (or a remainder less than 40 t),
ADD one tensile test sample and one bending test sample.
9.3.2.2 It is allowed that the mixed lot is made up of different furnace pot
numbers of the same designation, the same smelting process, and the same
pouring procedure. The difference between the carbon content of each furnace
Weight
deviation
Actual total weight of sample - (total length of sample ×
theoretical weight)
Total length of sample × theoretical weight