GB 713-2014 English PDF

GB 713-2014: [GB/T 713-2014] Steel plates for boilers and pressure vessels
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GB 713-2014
ICS 77.140.50
H 46
GB
National Standard
of the People’s Republic of China
Replacing GB 713-2008
Steel plates for boilers and pressure vessels
(ISO 9328-2:2011, Steel flat products for pressure purposes - Technical delivery
conditions - Part 2: Non-alloy and alloy steels with specified elevated temperature
properties, NEQ)
ISSUED ON: JUNE 24, 2014
IMPLEMENTED ON: APRIL 01, 2015
Issued by: General Administration of Quality Supervision, Inspection
and Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Ordering contents ... 7 
4 Designation representing methods ... 8 
5 Size, shape, weight and permissible tolerances ... 8 
6 Technical requirements ... 8 
7 Testing methods ... 14 
8 Inspection rules ... 15 
9 Packaging, marks and quality certificates ... 16 
Appendix A ... 17 
Steel plates for boilers and pressure vessels
1 Scope
This Standard specifies the ordering content, designation’s representing method, size,
shape, weight and permissible tolerances, technical requirements, testing methods,
inspection rules, packaging, marks, and quality certificate of boilers and pressure
vessels.
This Standard is applicable to those boilers and pressure vessels whose pressure
parts are the steel plates with thickness of 3mm-250mm.
2 Normative references   
The following documents are essential for the application of this document. For dated
references, only the dated editions apply to this document. For undated references,
the latest editions (including all corrections) of the referenced documents apply to this
document.
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 Methods for chemical analysis of iron, steel and alloy - The chrome
azurol S photometric method for the determination of aluminium content
GB/T 223.11 Iron, Steel and Alloy－Determination of Chromium Content - Visual
Titration or Potentiometric Titration Method (GB/T 233.11-2008, 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
diantipyrylmethane photometric method for the determination of titanium content
GB/T 223.18 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium
Thiosulfate Separation Iodimetric Method for the Determination of Copper Content
GB/T 223.23 Iron, Steel and Alloy - Determination of Nickel Content - The
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 STANDARD test method for spark discharge atomic emission
spectrometric analysis of carbon and low-Alloy steel (routine method)
GB/T 4338 Metallic materials - Tensile testing at elevated temperature (GB/T
4338-2006, ISO 783:1999, MOD)
GB/T 5313 Steel plates with through-thickness characteristics
GB/T 6803 Test method for drop test to determine nil-ductility transition
temperature of ferritic steels
GB/T 8170 Rules of rounding off for numerical values and expression and judgement
of limiting values
GB/T 8650-2006 Evaluation of pipeline and pressure vessel steels for resistance to
hydrogen-induced cracking
GB/T 17505 Steel and Steel Products - General Technical Delivery Requirements
(GB/T 17505-1998, eqv ISO 404:1992)
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 28297 Thicker steel plates - Method for automatic ultrasonic testing
JB/T 4730.3 Nondestructive Testing of Pressure Equipment - Part 3: Ultrasonic
Testing
3 Ordering contents 
According to the contracts and order forms, the contents shall include:
a) Standard number;
b) Product name;
6.1.1.2 According to purchaser’s requirement, 07Cr2AlMoR steel can be added with
appropriate rare earth elements.
6.1.1.3 Q245R and Q345R steel can be added with trace-elements Nb, V, Ti. The
contents shall be filled in the quality certificates. Above three elements’ contents shall
not be more than 0.050%, 0.12% in-total respectively.
6.1.1.4 As residual elements, the contents of Cr, Ni, Cu shall not be more than 0.30%
respectively; the content of Mo shall not be more than 0.080%; the total content of
these elements shall not be more than 0.70%. Analysis can be exempted if the
supplier can guarantee the contents.
6.1.1.5 According to purchaser’s demand, designations such as Q245R, Q345R,
Q370R, Q420R can specify the carton equivalent. The values shall be decided by
both parties. Carbon equivalent is calculated by Formula (1):
15/)(5/)(6/(%) CuNiVMoCrMnCCEV  ...(1)
6.1.2 Permissible tolerances of finished steel plates’ chemical composition shall
comply with the rules of GB/T 222; in which the chemical analysis’s permissible
tolerances of steel finished products: P+0.003%, S+0.002%.
6.2 Manufacturing methods
6.2.1 Steel is smelted in oxygen converter or electric furnace, and it is refined out of
furnace.
6.2.2 Compression ratios of continuous-casting billet and steel ingot are not less than
3; compression ratio of electric slag re-melting billet is not less than 2.
6.3 Delivery states
6.3.1 Delivery states of steel plates are specified in Table 2.
Table 2 Mechanical property and processing property
according to the delivery states of Table 2. Size of sample billets (width × thickness ×
length) shall not be less than 3t×t×3t (t is the thickness of the steel plate).
6.3.4 With the agreement of purchaser, chromium-molybdenum steel plates with more
than 60mm thickness can be delivered in the state – after normalizing,
accelerated cooling and tempering.
6.3.5 Steel plates shall be delivered in cutting state or flame cutting state. When it is
limited by capacity of equipment, with the agreement of purchaser and indicated in
contracts, it is allowed to deliver in burr-state.
6.4 Mechanics and processing property
6.4.1 The results of tensile tests, Charpy (V-notch) impact tests and bending tests
shall comply with Table 2.
6.4.1.1 For steel plates with more than 60mm thickness, with agreement of purchaser
and indication in contract, it may be exempted from bending test.
6.4.1.2 According to the requirement of purchaser, Q245R, Q345R and 12MnNiMoR
steel plates can do the -20°C impact test, to substitute the 0°C impact test in Table 2.
The value of impact absorption energy value shall comply with Table 2.
6.4.1.3 Charpy (V-notch) impact absorption is calculated according to the arithmetic
mean of 3 samples. It allows one of samples’ value to be lower than the
value specified in Table 2, but not lower than 70% of the specified value.
6.4.1.4 For the Charpy (V-notch) impact test of steel plates with less than 12mm
thickness, it shall use auxiliary sample. The size of >8mm~< 12mm auxiliary sample is
10mm×7.5mm×55mm; its results shall not be less than 75% of specified value in
Table 2. The size of 6mm~8mm auxiliary sample is 10mm×5mm×55mm; its results
shall not be less than 50% of specified value in Table 2. Impact test may be exempted
if the steel plates’ thickness is less than 6mm.
6.4.2 According to the requirements of purchaser, steel plates with more than 20mm
thickness can do the high-temperature tensile test, and the temperature shall be
indicated in contract. Under high temperature, the plastic elongation strength Rp0.2 or
yield strength value ReL shall comply with Table 3.
8 Inspection rules   
8.1 Test of steel plates shall be done by the quality inspection department of the
supplier.
8.2 Steel plates shall be accepted in batches. Every batch of steel plates consists of
steel plates in the same shape, same-furnace number, same-thickness, same-rolling
or same-thermal treatment. Weight of every batch is not more than 30t.
For steel plates of which the single-sheet weight is more than 30t, it shall be
group-batched according to the rolling sheets.
For steel plates that is delivered in such state – after normalizing, accelerated cooling
and tempering, it shall be group-batched according to the thermal treatment sheets.
8.3 According to the requirements of purchaser, with the agreement of both parties,
for steel plates with more than 16mm thickness, the mechanical properties shall be
performed sheet by sheet.
8.4 The sampling position of mechanical property test shall be according to the
provisions of GB/T 2975. For steel plates with more than 40mm thickness, the axis of
impacting samples shall be at position of 1/4 thickness.
According to the requirements of purchaser, with the agreement of both parties, the
axis of impacting samples may be at position of 1/2 thickness.
8.5 When the results of impact test do not comply with the provisions of 6.4.1.3 of this
Standard, it shall take another 3 samples from the same sheet of steel plate (or the
same billet) to perform the test. The arithmetic mean of the impact absorption energy
of the 6 samples shall not be less than the specified value. It is allowed to have 2
samples to be less than the specified value, but only one of them is allowed to be less
than 70% of the specified value.
8.6 Reinspection and determination of other inspection items shall be executed
according to the relevant provisions of GB/T 17505.
8.7 Rounding value comparison method shall apply to this Standard. Rounding rules
shall be executed according to GB/T 8170.
GB 713-2014
ICS 77.140.50
H 46
GB
National Standard
of the People’s Republic of China
Replacing GB 713-2008
Steel plates for boilers and pressure vessels
(ISO 9328-2:2011, Steel flat products for pressure purposes - Technical delivery
conditions - Part 2: Non-alloy and alloy steels with specified elevated temperature
properties, NEQ)
ISSUED ON: JUNE 24, 2014
IMPLEMENTED ON: APRIL 01, 2015
Issued by: General Administration of Quality Supervision, Inspection
and Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword ... 3 
1 Scope ... 5 
2 Normative references ... 5 
3 Ordering contents ... 7 
4 Designation representing methods ... 8 
5 Size, shape, weight and permissible tolerances ... 8 
6 Technical requirements ... 8 
7 Testing methods ... 14 
8 Inspection rules ... 15 
9 Packaging, marks and quality certificates ... 16 
Appendix A ... 17 
Steel plates for boilers and pressure vessels
1 Scope
This Standard specifies the ordering content, designation’s representing method, size,
shape, weight and permissible tolerances, technical requirements, testing methods,
inspection rules, packaging, marks, and quality certificate of boilers and pressure
vessels.
This Standard is applicable to those boilers and pressure vessels whose pressure
parts are the steel plates with thickness of 3mm-250mm.
2 Normative references   
The following documents are essential for the application of this document. For dated
references, only the dated editions apply to this document. For undated references,
the latest editions (including all corrections) of the referenced documents apply to this
document.
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 Methods for chemical analysis of iron, steel and alloy - The chrome
azurol S photometric method for the determination of aluminium content
GB/T 223.11 Iron, Steel and Alloy－Determination of Chromium Content - Visual
Titration or Potentiometric Titration Method (GB/T 233.11-2008, 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
diantipyrylmethane photometric method for the determination of titanium content
GB/T 223.18 Methods for Chemical Analysis of Iron, Steel and Alloy - The Sodium
Thiosulfate Separation Iodimetric Method for the Determination of Copper Content
GB/T 223.23 Iron, Steel and Alloy - Determination of Nickel Content - The
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 STANDARD test method for spark discharge atomic emission
spectrometric analysis of carbon and low-Alloy steel (routine method)
GB/T 4338 Metallic materials - Tensile testing at elevated temperature (GB/T
4338-2006, ISO 783:1999, MOD)
GB/T 5313 Steel plates with through-thickness characteristics
GB/T 6803 Test method for drop test to determine nil-ductility transition
temperature of ferritic steels
GB/T 8170 Rules of rounding off for numerical values and expression and judgement
of limiting values
GB/T 8650-2006 Evaluation of pipeline and pressure vessel steels for resistance to
hydrogen-induced cracking
GB/T 17505 Steel and Steel Products - General Technical Delivery Requirements
(GB/T 17505-1998, eqv ISO 404:1992)
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 tota...