GB/T 34560.4-2017 (GB/T34560.4-2017, GBT 34560.4-2017, GBT34560.4-2017)
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Structural steels -- Part 4: Technical delivery conditions for high yield strength quenched and tempered structural steel plates
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GB/T 34560.4-2017
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| Standard ID | GB/T 34560.4-2017 (GB/T34560.4-2017) | | Description (Translated English) | Structural steels -- Part 4: Technical delivery conditions for high yield strength quenched and tempered structural steel plates | | Sector / Industry | National Standard (Recommended) | | Classification of Chinese Standard | H46 | | Classification of International Standard | 77.140.01 | | Word Count Estimation | 14,162 | | Date of Issue | 2017-10-14 | | Date of Implementation | 2018-07-01 | | Drafting Organization | Shougang Corporation, Anshan Iron and Steel Co., Ltd., Metallurgical Industry Information Standards Institute, Jiangyin Xingcheng Special Steel Co., Ltd. | | Administrative Organization | National Steel Standardization Technical Committee (SAC/TC 183) | | Proposing organization | China Iron and Steel Association | | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of PRC; China National Standardization Administration |
GB/T 34560.4-2017
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.01
H 46
Structural steels - Part 4. Technical delivery
conditions for high yield strength quenched and
tempered structural steel plates
(ISO 630-4.2012, MOD)
ISSUED ON. OCTOBER 14, 2017
IMPLEMENTED ON. JULY 01, 2018
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine of the People's Republic of China;
Standardization Administration of the People's Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Terms and definitions ... 8
4 Grade representation method ... 8
5 Ordering content ... 8
6 Dimension, shape, weight ... 9
7 Technical requirements ... 10
8 Test methods ... 15
9 Inspection rules ... 16
10 Packaging, marking and quality certificate ... 17
Annex A (informative) Structural changes in this Part compared with ISO 630-
4.2012 ... 18
Annex B (informative) Technical differences between this Part and ISO 630-
4.2012 and their causes ... 19
Annex C (informative) Comparison of domestic and foreign standard grades
... 21
Structural steels - Part 4. Technical delivery
conditions for high yield strength quenched and
tempered structural steel plates
1 Scope
This Part of GB/T 34560 specifies the terms and definitions, grade
representation method, ordering content, dimension, shape, weight, technical
requirements, test methods, inspection rules, packaging, marking and quality
certificate of high yield strength quenched and tempered structural steel plates.
This Part applies to quenched and tempered steel plates with a nominal
thickness of 3 mm to 150 mm and an upper yield strength of 460 MPa to 1300
MPa for welded or bolted structures.
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 223.3 Methods for chemical analysis of iron, steel and alloy - The
diantipyryl methane phosphomolybdate gravimetric method for the
determination of phosphorus content
GB/T 223.9 Iron, steel and alloy - Determination of aluminium content -
Chrom azurol S photometric method
GB/T 223.11 Iron, steel and alloy - Determination of chromium content -
Visual titration or potentiometric titration method (GB/T 223.11-2008, ISO
4937.1986, MOD)
GB/T 223.14 Methods for chemical analysis of iron, steel and alloy - The N-
benzoy-N-phenylhydroxylamine extraction photometric method for the
determination of vanadium content
GB/T 223.17 Methods for chemical analysis of iron, steel and alloy - The
distillation-curcumin photometric method
GB/T 223.76 Methods for chemical analysis of iron, steel and alloy - The
flame atomic absorption spectrometric method for the determination of
vanadium content
GB/T 228.1 Metallic materials - Tensile testing - Part 1. Method of test at
room temperature (GB/T 228.1-2010, ISO 6892-1.2009, MOD)
GB/T 229 Metallic materials - Charpy pendulum impact test method (GB/T
229-2007, ISO 148-1.2006, MOD)
GB/T 232 Metallic materials - Bend test (GB/T 232-2010, ISO 7438.2005,
MOD)
GB/T 247 General rule of package, mark and certification for steel plates
(sheets) and strips
GB/T 709 Dimension, shape, weight and tolerances for hot-rolled steel plates
and sheets
GB/T 2975 Steel and steel products - Location and preparation of test pieces
for mechanical testing (GB/T 2975-1998, eqv ISO 377.1997)
GB/T 4336 Carbon and low-alloy steel - Determination of multi-element
contents - Spark discharge atomic emission spectrometric method (routine
method)
GB/T 5313 Steel plates with through-thickness characteristics
GB/T 13304.1 Steels classification - Part 1. Classification of according to
chemical composition (GB/T 13304.1-2008, ISO 4948-1.1982, MOD)
GB/T 20066 Steel and iron - Sampling and preparation of samples for the
determination of chemical composition (GB/T 20066-2006, ISO 14284.1996,
IDT)
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 20123-2006, ISO 15350.2000, IDT)
GB/T 20125 Low-alloy steel - Determination of multi-element contents -
Inductively coupled plasma atomic emission spectrometric method
GB/T 34560.1 Structural steels - Part 1. General technical delivery condition
for hot-rolled products (GB/T 34560.1-2017, ISO 630-1.2011, MOD)
5.2 Agreed upon between the supply and demand parties and indicate in the
contract, the following may be selected as the ordering content of this Part. If
the demand party does not specify when providing the inquiry and ordering, the
product shall be supplied in accordance with 5.1.
a) smelting method;
b) analysis of finished products;
c) calculation formula for carbon equivalent (CEV) or weld crack sensitivity
index (Pcm);
d) mechanical properties after additional heat treatment;
e) through-thickness characteristics;
f) chemical analysis method;
g) frequency of tests;
h) direction of impact test specimen;
i) packaging and marking;
j) appropriate hot dip galvanizing method agreed upon under relevant
standards;
k) non-destructive testing agreed upon under relevant standards.
6 Dimension, shape, weight
6.1 The unevenness of the steel plates with a minimum yield strength greater
than 1000 MPa shall comply with the specifications of Class N in Table 1.
Agreed upon between the supply and demand parties, and indicated in the
contract, the unevenness may also comply with the specifications of Class S in
Table 1. When the waveform spacing (the distance between the ruler and the
contact point of the steel plate) is 300 mm ~ 1000 mm, for Class N unevenness,
the maximum permissible value of the unevenness is 1.5 % of the waveform
spacing and does not exceed the value specified in Table 1; for Class S
unevenness, the maximum permissible value of the unevenness is 1 % of the
waveform spacing and does not exceed the value specified in Table 1.
6.2 The dimension, shape, weight and permissible deviation of steel plates
other than those specified in 6.1 shall comply with the specifications of GB/T
709.
6.3 Steel plates of other dimensions, shapes and permissible deviations may
method is selected by the supplely party.
7.3 Delivery status
The steel is delivered in quenched and tempered status, and the delivery status
shall be stated in the quality certificate.
7.4 Mechanical properties
7.4.1 The tensile properties and impact absorption energy of steel plates shall
comply with the specifications of Table 4.
7.4.2 Agreed upon between the supply and demand parties, steel plates may
be subjected to the transverse impact test. At this time, the value of the
minimum impact absorption energy KV2 is determined upon negotiation
between the supply and demand parties
7.4.3 The requirements for tensile and impact tests of steel plates shall comply
with the specifications of GB/T 34560.1.
7.4.4 When the demand party has requirements for through-thickness
characteristic, it shall be indicated in the contract and the relevant specifications
of GB/T 5313 shall be implemented.
7.5 Surface quality
The surface quality of steel plates shall comply with the specifications of GB/T
34560.1.
7.6 Non-destructive testing
7.6.1 Agreed upon between the supply and demand parties and indicated in the
contract, steel plates may be subjected to the non-destructive testing one by
one. The testing criterion and qualification levels shall be indicated in the
contract.
7.6.2 Steel plates with through-thickness characteristic shall be ultrasonically
tested, and the qualification level shall be indicated in the contract.
7.7 Special requirements
Agreed upon between the supply and demand parties and indicated in the
contract, it may propose other special requirements on steel plates.
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