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Q/BQB 610-2023: Steel plates for structure Q/BQB 610: Evolution and historical versions
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PDF similar to Q/BQB 610-2023
Standard similar to Q/BQB 610-2023 NMPA RULES66 Q/BQB 611 Q/BQB 600 Basic data | Standard ID | Q/BQB 610-2023 (Q/BQB610-2023) | | Description (Translated English) | Steel plates for structure | | Sector / Industry | Chinese Industry Standard | | Classification of Chinese Standard | QBQ | | Word Count Estimation | 10,175 | | Date of Issue | 2023-04-09 | | Date of Implementation | 2023-07-01 | | Issuing agency(ies) | Baoshan Iron & Steel Co., Ltd. | Q/BQB 610-2018: Steel plates for structure---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Steel plates for structure
release
Replace Q/BQB 610-2013
Thick steel plate for structure
Published on.2018-01-15
2018-04-10 Implementation
Foreword
This standard is drafted in accordance with the rules given in GB/T 1.1-2009 "Standardization Work Guidelines Part I. Standard Structure and Compilation".
This standard is based on JIS G3101..2015/AMENDMENT 1.2017 and EN10025-2.2004, and is based on the actual situation of Baosteel.
This standard replaces Q/BQB 610-2013 "Thick Steel Plate for Structure", and the main changes compared with the original standard are as follows.
-- GB/T.20124 has been added to the normative reference document, GB/T.20126 reference has been deleted, and the GB/T 2975 year number has been added;
- tightening the regulations on phosphorus and sulfur content in chemical compositions of various grades;
-- Improve the requirements for retesting of impact tests.
Appendix A of this standard is an informative annex.
This standard was proposed by the Manufacturing Management Department of Baoshan Iron and Steel Co., Ltd.
This standard was drafted by the Manufacturing Management Department of Baoshan Iron and Steel Co., Ltd.
The drafter of this standard is Huang Jinhua.
The previous versions of the standards replaced by this standard are. Q/BQB 610-2004, Q/BQB 610-2009, Q/BQB 610-2013.
Thick steel plate for structure
1 Scope
This standard specifies the dimensions, shape, technical requirements, tests and inspections, markings and inspection documents for structural thick steel plates. This standard is suitable
Used for thick steel plates for structural production produced by Baoshan Iron and Steel Co., Ltd.
2 Normative references
The following documents are indispensable for the application of this document. For dated references, only the dated version applies to this document.
For undated references, the latest edition (including all amendments) applies to this document.
GB/T 223 steel and alloy chemical analysis method
GB/T 228.1 tensile testing of metallic materials - Part 1
GB/T 229 metal material Charpy pendulum impact test method
GB/T 232 metal material bending test method
GB/T 2975-1998 Steel and steel products, mechanical properties test, sampling position and sample preparation
GB/T 4336 Determination of multi-element content of carbon steel and medium-low alloy steels by spark discharge atomic emission spectrometry (conventional method)
GB/T.20066 Sampling and sample preparation method for samples for determination of chemical composition of steel and iron
GB/T.20123 Determination of total carbon and sulfur content of steels - Infrared absorption method after high-frequency induction furnace combustion (conventional method)
GB/T.20124 Determination of nitrogen content of steels - Insulating gas fusion heat conduction method (conventional method)
GB/T.20125 Determination of multi-element content of low alloy steels by inductively coupled plasma atomic emission spectrometry
General technical requirements for Q/BQB 600 thick steel plate
3 General technical requirements
Unless otherwise specified in this standard, steel plates supplied in accordance with this standard shall comply with the corresponding requirements of Q/BQB 600.
4 classification and code
The grade, nominal thickness and use of the steel plate are shown in Table 1.
Table 1
Brand nominal thickness mm
SS330, SS400, SS490 5～150 Steel plates for general structure, used for bridges, ships, vehicles
Vehicles and other structural parts. SS540 5～40
S185, S235JR, S235J0, S235J2
S275JR, S275J0, S275J2
S355JR, S355J0, S355J2, S355K2
5~150
Non-alloy structural steel plates for welding, bolting,
Riveted structure.
5 Technical requirements
5.1 Brand and chemical composition
5.1.1 The grade and chemical composition of the steel (melting analysis) shall comply with the requirements of Tables 2 and 3.
Table 2
Brand
Chemical composition (melting analysis) %
C Mn PS other
SS330 - -
≤ 0.025 ≤ 0.020 Others can be added as needed
alloy element
SS400 - -
SS490 - -
SS540 ≤0.30 ≤1.60 ≤0.025 ≤0.020
table 3
Brand
Chemical composition (melting analysis) %
C, ≤
Si
Mn
Na
Cu
Nominal thickness, mm
5～40 >40～150
S185 - - - - 0.030 0.030 - -
S235JR
0.17
0.20
- 1.40
0.025 0.020 0.012
0.55S235J0 0.17 0.025 0.020 0.012
S235J2 0.17 0.025 0.020 -
S275JR 0.21 0.22
- 1.50
0.025 0.020 0.012
0.55S275J0
0.18 0.18
0.025 0.020 0.012
S275J2 0.025 0.020 -
S355JR 0.24 0.24
0.55 1.60
0.025 0.020 0.012
0.55
S355J0
0.20b 0.22
0.025 0.020 0.012
S355J2 0.025 0.020 -
S355K2 0.025 0.020 -
a When Alt ≥ 0.020 or Als ≥ 0.015 or other sufficient nitrogen fixation elements are used, the N maximum is not applicable and nitrogen fixation should be provided in the inspection document.
b When the nominal thickness is >30mm, C≤0.22.
5.1.2 The chemical composition of the finished product in Table 3 shall comply with the provisions of Table 4. If the supplier can guarantee, the finished product may not be analyzed.
5.1.3 The carbon equivalents of the grades in Table 3 except S185 shall comply with the requirements of Table 5.
Table 4
Brand
Chemical composition (finished product analysis) %
C, ≤
Si
Mn
Na
Cu
Nominal thickness, mm
5～40 >40～150
S185 - - - - 0.035 0.035 - -
S235JR
0.19
0.23
- 1.50
0.030 0.025 0.014
0.60S235J0 0.19 0.030 0.025 0.014
S235J2 0.19 0.030 0.025 -
S275JR 0.24 0.25
- 1.60
0.030 0.025 0.014
0.60S275J0
0.21 0.21
0.030 0.025 0.014
S275J2 0.030 0.025 -
S355JR 0.27 0.27
0.60 1.70
0.030 0.025 0.014
0.60
S355J0
0.23b 0.24
0.030 0.025 0.014
S355J2 0.030 0.025 -
S355K2 0.030 0.025 -
a When Alt ≥ 0.015 or Als ≥ 0.013 or other sufficient nitrogen fixing elements are used, the N maximum is not applicable and the nitrogen fixing element should be provided in the inspection document.
b When the nominal thickness is >30mm, C≤0.24.
table 5
Brand
Carbon equivalent Ceqa %
Thickness, mm
≤30 >30～40 >40～150
S235JR, S235J0, S235J2 0.35 0.35 0.38
S275JR, S275J0, S275J2 0.40 0.40 0.42
S355JR, S355J0, S355J2, S355K2 0.45 0.47 0.47
a Calculate carbon equivalent based on smelting analysis.
5.2 Mechanics and process performance
5.2.1 The mechanical and process properties of the steel plate are to comply with the requirements of Tables 6 and 7.
CuNi
VMoCr
6eq
MnCC
5.2.2 After the bending test, the outer surface of the specimen shall be free from visible cracks. If the supplier can guarantee the test is qualified, the test may not be carried out.
5.2.3 Shock absorption energy is the average of the test results of a group of three samples, allowing the test result of one of the samples to be less than the specified value, but
Not less than 70% of the specified value.
5.2.4 The impact test is only applicable to steel plates with a thickness of 6 mm or more. When impact test is carried out on steel plates with a thickness of 12 mm or more,
The standard sample of 10.0mm×10.0mm×55mm shall be used, and the test results shall meet the specified values in the table; for thicknesses greater than or equal to 6mm and less than
When the 12.0mm steel plate is subjected to the impact test, an auxiliary sample of 7.5mm × 10.0 × 55mmmm or 5.0mm × 10.0mm × 55mm shall be used.
The test results are not less than 75% or 50% of the values specified in the table.
5.2.5 If the impact test results do not meet the specified requirements, three additional samples may be taken on the same sampled product for testing.
The average value of the sample should not be less than the specified value, and the sample below the specified value can only have at most two samples, and only one of the values is allowed to be smaller than the gauge.
70% of the value.
Table 6
Tensile test a
180°
Bending test b
D = bending head
diameter
a=sample thickness
Upper yield strength
MPa, ≥ tensile
strength
MPa
Elongation after break %, ≥
Tensile specimen number (size, mm)
P14 (L0=50,
b=25)
P16 c
(L0=200, b=40)
(L0=50,
d=14)c,d
Nominal thickness mm nominal thickness mm
>16
~40
>40
~100
>5
~16
>16
~50 >40
SS330 205 195 175 165 330~430 26 21 26 28 D=1a
SS400 245 235 215 205 400~510 21 17 21 23 D=3a
SS490 285 275 255 245 490～610 19 15 19 21 D=4a
SS540 400 390 - - ≥540 16 13 17 - D=4a
a Tensile test takes a transverse test specimen; when the yielding phenomenon is not obvious, Rp0.2 is used.
b The bending test takes a transverse specimen with a width b = 20 to 50 mm. The width of the sample during the arbitration test was 20 mm.
c For the thickness of the steel plate >40mm~50mm, the tensile test sample at the time of arbitration is L0=50mm and d=14mm.
d is a non-proportional sample, Lc ≈ 60 mm, r ≥ 15 mm. Elongation of >90mm thickness of steel plate, for each 25.0mm increase in thickness or part thereof, the elongation in the table shall be reduced
1%, but limited to 3%.
Table 7
Tensile test a impact test b
Upper yield strength
MPa, ≥
tensile strength
MPa
Elongation after break %, ≥
temperature
Impact suction
Income
KV2
J, ≥
L0=5.65 0S
Nominal thickness mm
5~
>16
~40
>40
~63
>63
~80
>80
~100
>100
~150
5~
>100
~150
5~
>40
~63
>63
~100
>100
~150
S185 185 175 175 175 175 165
290~
280~
16 15 14 13 - -
S235JRc
235 225 215 215 215 195
360~
350～
27S235J0 0
S235J2 -20
S275JRc
275 265 255 245 235 225
410～
400~
27S275J0 0
S275J2 -20
S355JRc
355 345 335 325 315 295
470~
450~
27S355J0 0
S355J2 -20
S355K2 -20 40
a Tensile test takes a transverse test specimen, and when the yielding phenomenon is not obvious, Rp0.2 is used.
b Impact test Take a longitudinal test specimen.
c If the supplier can guarantee that the impact test will not be carried out.
6 Inspection and testing
6.1 Types of inspection documents shall comply with the provisions of 6.2 to 6.4 when selecting the specified inspection and test.
6.2 The number of samples, sampling methods and test methods required for each batch of steel plate inspection items shall comply with the requirements of Table 8.
Table 8
No. Test item number of samples, one sampling method test method
1 Chemical analysis a 1 (per furnace) GB/T.20066 GB/T 223, GB/T 4336, GB/T.20123
GB/T.20124, GB/T.20125 or general method
2 Tensile test 1 GB/T 2975 GB/T 228.1
3 Bending test 1 GB/T 2975 GB/T 232
4 Impact test 1 group (3) GB/T 2975 Figure A11 a) GB/T 229
a When arbitrating, the test method adopts GB/T 223.
6.3 sampling frequency
6.3.1 Sampling frequency of chemical composition analysis
Melting analysis of chemical components by furnace.
6.3.2 Sampling frequency for tensile and bending properties
Each batch shall be made of steel plates of the same furnace number, the same grade, the maximum thickness not exceeding 2 times the minimum thickness, and the same delivery state with a weight of not more than 50 tons.
composition. When the batch weight is greater than 50 tons, take two samples. When the batch consists of a single sheet of steel, take one sample.
6.3.3 Sampling frequency of impact performance
Each batch shall consist of steel plates of the same furnace number, the same grade, and the same delivery status. The specimen shall be taken from the thickest steel plate in the batch.
6.3.4 The negotiation rules may be determined separately by negotiation between the supplier and the buyer.
6.4 Re-test of impact test
If the impact test results do not meet the specified requirements, the single-plate steel that has been tested and the results are not acceptable cannot be accepted, and is the same as the sampled steel plate.
The thickness of the steel plate is submitted to the impact test and acceptance one by one, and the impact test and acceptance are submitted to the new batch of steel plates of other thicknesses.
7 Appendix
Appendix A (informative appendix) lists the comparison table of this standard with the reference standard and the national standard.
Appendix A
(informative appendix)
This standard is compared with the reference standard and the national standard.
Table A.1
GB/T 3274-2017
GB/T 711-2017
SS330 SS330 Q195, Q215A, Q215B, 10
SS400 SS400 Q235A
SS490 SS490 Q275A
SS540 SS540 Q420A
Table A.2
S185 St33 Fe310-0 S185 Q195, Q215A
S235JR St37-2, RSt37-2 Fe360B S235JR Q235B
S235J0 St37-3 Fe360C S235J0 Q235C
S235J2 - Fe360D S235J2 Q235D
S275JR St44-2 Fe430B S275JR Q255B
S275J0 St44-3 Fe430C S275J0 Q275C
S275J2 - Fe430D S275J2 Q275D
S355JR - Fe510B S355JR Q345B
S355J0 St52-3 Fe510C S355J0 Q345C
S355J2 - Fe510D S355J2 Q345D
S355K2 - Fe510DD S355K2 Q345E
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