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GB 1499.1-2024: Steel for the reinforcement of concrete - Part 1: Hot rolled plain bars
GB 1499.1-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.15
CCS H 44
Replacing GB/T 1499.1-2017
Steel for the reinforcement of concrete - Part 1.Hot rolled
plain bars
ISSUED ON. JUNE 25, 2024
IMPLEMENTED ON. SEPTEMBER 25, 2024
Issued by. State Administration for Market Regulation;
Standardization Administration of the People's Republic of China.
Table of Contents
Foreword... 3
Introduction... 5
1 Scope... 6
2 Normative references... 6
3 Terms and definitions... 7
4 Designation... 7
5 Size, shape, weight and allowable deviation... 8
6 Smelting and performance... 10
7 Test methods... 11
8 Inspection rules... 12
9 Packaging, marks and quality certificates... 13
Annex A (normative) Rules for characteristic value inspection... 15
Foreword
This document was drafted in accordance with the rules given in GB/T 1.1-2020
"Directives for standardization - Part 1.Rules for the structure and drafting of
standardizing documents".
This document is Part 1 of GB 1499 "Steel for the reinforcement of concrete". The
following parts of GB 1499 have been released.
- Part 1.Hot rolled plain bars;
- Part 2.Hot rolled ribbed bars;
- Part 3.Welded fabric.
This document replaces GB/T 1499.1-2017 "Steel for the reinforcement of concrete --
Part 1.Hot rolled plain bars". Compared with GB/T 1499.1-2017, in addition to
structural adjustments and editing changes, the main technical changes are as follows.
- Delete the recommended reinforcement nominal diameter (see 6.1 of Edition 2017);
- Change the nominal diameter range (see 5.1 of this Edition; 6.1 of Edition 2017);
- Add the technical requirements of 25 mm specifications (see 5.1, Table 2, Table 3,
Table 4 of this Edition);
- Change the weight of the weight (see Table 4 of this Edition; Table 4 of Edition
2017);
- Add the sampling requirements of the size and surface quality (see Table 7 of this
Edition);
- Change the accuracy of the total weight of the weight deviation (see 7.4.1 of this
Edition; 8.4.1 of Edition 2017);
- Change the mixed batch requirements (see 8.3.2 of this Edition; 9.3.2 of Edition
2017);
- Change the re-inspection provisions of the weight deviation (see 8.3.5 of this
Edition; 9.3.5 of Edition 2017);
- Change the provisions of the packaging, mark and quality certificate (see Chapter
9 of this Edition; Chapter 10 of Edition 2017).
Attention is drawn to the possibility that some of the elements of this document may be
the subject of patent rights. The issuing authority shall not be held responsible for
identifying any or all such patent rights.
Steel for the reinforcement of concrete - Part 1.Hot rolled
plain bars
1 Scope
This document specifies the designation, size, shape, weight and allowable deviation,
smelting and performance, test methods, inspection rules, packaging, marks and quality
certificates for the hot rolled plain bars the reinforcement of concrete (hereinafter
referred to as steel bars).
This document is applicable to hot rolled straight strips or coils of reinforced concrete.
This document is not applicable to regenerative steel bars for reinforcement made of
finished steel.
2 Normative references
The following referenced documents are indispensable for the application of this
document. For dated references, only the edition cited applies. For undated references,
the latest edition of the referenced document (including any amendments) applies.
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, Iron, steel and alloy -- Determination of manganese content - Sodium
(potassium) periodate spectrophotometric method
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
For the purposes of this document, the following terms and definitions apply.
3.1 hot rolled plain bars
The finished bars that after the hot rolling form, the cross -section is usually round,
smooth surface.
3.2 characteristic value
In the unlimited inspection, the division value corresponding to the probability of a
certain regulation.
4 Designation
4.1 The yield strength feature value of the bar is 300.
4.2 See Table 1 for the composition and meaning of bar designation.
7.2.2 The cross-sectional area used to calculate the strength of steel bars is the nominal
cross-sectional area listed in Table 2.
7.3 Size measurement
The measurement of steel bar diameter shall be accurate to 0.1 mm.
7.4 Measurement of weight deviation
7.4.1 When measuring the weight deviation of steel bars, specimens shall be taken from
different steel bars. The quantity is 5 pieces. The length of each specimen shall not be
less than 500 mm. The length shall be measured one by one, with an accuracy of 1 mm.
When measuring the total weight of the specimen, it shall be accurate to 1 g.
7.4.2 The deviation (%) between the actual weight and theoretical weight of steel bars
shall be calculated according to formula (1).
Where,
η - deviation between actual weight and theoretical weight,%;
M - actual total weight of the specimen, in grams (g);
L - total length of the specimen, measured in millimeters (mm);
m - theoretical unit weight, measured in grams per millimeter (g/mm).
7.5 Numerical rounding and judgment
The rounding and judgment of the test results shall comply with the provisions of YB/T
081.
8 Inspection rules
8.1 Inspection classification
The inspection of steel bars is divided into characteristic value inspection and delivery
inspection.
8.2 Characteristic value inspection
8.2.1 Characteristic value inspection is applicable to the following situations.
a) Supplier's inspection of product quality control;
b) Inspection required by the purchaser and after mutual agreement between the
supplier and the purchaser;
c) Third party product certification and arbitration inspection.
8.2.2 Characteristic value inspection shall be conducted in a...