ICS 77.140 .50 
H 46  
 
 
National Standard of the  
People’s Republic of China  
GB 19189 -xxxx  
Replacing  GB 19189 -2003  
 
 
 
 
Quenched and tempered high strength steel plates for pressure vessels  
 
(Draft for Approval)  
 
 
 
 
 
 
 
 
 
 
Issued on XX -XX-XXXX  Effective on XX -XX-XXXX  
Issued by the  General Administration of Quality Supervision, Inspection and Quarantine of the  
People's Republic of China and the Standardization Administration of China  GB 19189 -xxxx  
 
2 Foreword  
Sections  2, 3 & 4, Articles 5.2.1, 6.1.3, 6.4.4 & 6.7 and Appendix A are 
recommendatory while the rest is mandatory.  
This standard is drafted in accordance with the rules put forward in GB/T1.1 -2009.  
GB 19189 -2003 (Quenched and Tempered High Strength Steel Plates for Pressure 
Vessels) shall cease to be effective as of the day on which this standard comes into effect.  
In comparison with GB 19189 -2003, this standard contains the following major changes:  
- Expanding the range of the thickness of steel plates, with the minimum thickness 
extended to 12mm from  10mm;  
- Changing the grade 07MnCrM oVR in the previous standard to 07MnMoVR, and 
07MnNiMoVDR to 07MnNiVDR; adding the new grade 07MnNiMoDR;  
- Lowering the content of P and S in each grade;  
- Raising the KV 2 norm in each grade from 47J to 80J.  
The steel grades 07MnMoVR, 07MnNiVDR and 07Mn NiMoDR in this standard are 
low-welding crack -sensitive steel, and the grade 12MnNiVR is large heat input steel for 
welding (welding heat input shall not exceed 100 kJ/cm).  
The consistency  of this standard with the corresponding part in JIS G3115 -2005 (st eel 
plates for pressure vessels) shall not be construed as equivalence.  
This standard is put forward by China Iron and Steel Association.  
This standard is under the jurisdiction of the National Steel Standardization Technical 
Committee.  
This standard ha s been drafted by the following companies/institutions: Wuhan Iron & 
Steel Group, China National General Machinery Engineering Corporation, China 
Metallurgical Information and Standardization Institute, Xinyu Iron & Steel Group, 
Hunan Hualing Xiangtan Iron  & Steel Co., Ltd., Hefei General Machinery Institute, 
Nanjing Iron and Steel Union Company Limited, Angang Steel Company Limited, 
Shougang Group, and China Special Equipment Inspection and Research Institute.  
The main authors of this standard are: Chen X iao, Li Shurui, Qin Xiaozhong, Wang 
Xiaohu, Ding Qingfeng, Wang Guowen, Liu Jianbing, Zhang Xiaohu, Xu Haiquan, Liu 
Xuyuan, Shi Li, Dong Hanxiong, Liu Xiaolin, Li Xiaoli and Huo Songbo.  
 
This standard was first released in June 2003.  GB 19189 -xxxx  
 
3 Quenched and Temper ed High Strength Steel Plates  
 for Pressure Vessels  
1  Scope   
This standard specifies the dimensions , appearance , technical requirements, test method, 
inspection rules, packing, labe lling and quality certificates concerning  quenched and 
tempered high stren gth steel plates for pressure vessels.  
This standard is applicable to quenched and tempered high strength steel plates for 
pressure vessels with a thickness of 10 -60mm.  
 
2  Normative References   
The following documents are indispensable for the applicati on of this document. For 
dated references, only the dated editions are applicable to this document; for all undated 
references, the latest edition (including all the amendments) shall apply.  
GB/T 222  Tolerances for the chemical composition of finished ste el  
GB/T 223.3  Method of chemical analysis of iron, steel and alloys: the measurement of 
phosphorus content by the diantipyryl methane phosphomolybdate 
gravimetric method  
GB/T 223.11  The measurement of chromium content in iron, steel and alloys by visual 
titration or potentionmetric titration  
GB/T 223.14  Method of chemical analysis of iron, steel and alloys: the measurement of 
vanadium by the tantalum extraction photometric method  
GB/T 223.18  Method of chemical analysis of iron, steel and alloys: the mea surement of 
copper content by the sodium thiosulfate separation - iodimetry method  
GB/T 223.19  Method of chemical analysis of iron, steel and alloys: the measurement of 
copper content by the neocuproine - chloroform extraction photometric 
method  
GB/T 223. 23  The measurement of nickel content in iron, steel and alloys by the 
dimethylglyoxime spectrophotometric method  
GB/T 223.26  The measurement of molybdenum content in iron, steel and alloys by the 
thiocyanate spectrophotometric method  
GB/T 223.54  Metho d of chemical analysis of iron, steel and alloys: the measurement of 
nickel content by flame atomic absorption spectrometry  
GB/T 223.58  Method of chemical analysis of iron, steel and alloys: the measurement of 
manganese content by sodium arsenite - sodium  titration  GB 19189 -xxxx  
 
4 GB/T 223.59  The measurement of phosphorous content in iron, steel and alloys by 
bismuth phosphomolybdate blue spectrophotometry and antimony 
phosphomolybdate blue spectrophotometry   
GB/T 223.60  Method of chemical analysis of iron, steel and alloys: the measurement of 
silicon content by the perchloric acid dehydration gravimetric method  
GB/T 223.61  Method of chemical analysis of iron, steel and alloys: the measurement of 
phosphorous content by the ammonium phosphomolybdate volumetric 
method  
GB/T 223.62  Method of chemical analysis of iron, steel and alloys: the measurement of 
phosphorous content by butyl acetate extraction spectrophotometry  
GB/T 223.63  Method of chemical analysis of iron, steel and alloys: the measurement of 
manganese conte nt by the sodium/potassium periodate photometric 
method  
GB/T 223.64  The measurement of manganese content in iron, steel and alloys by flame 
atomic absorption spectrometry  
GB/T 223.67  The measurement of sulphur content in iron, steel and alloys by the 
methylene blue spectrophotometric method  
GB/T 223.68  Method of chemical analysis of iron, steel and alloys: the measurement of 
sulphur content by potassium iodate titration after combustion in tube 
furnace  
GB/T 223.69  The measurement of carbon content in i ron, steel and alloys by the gas 
volumetric method after combustion in tube furnace  
GB/T 223.71  Method of chemical analysis of iron, steel and alloys: the measurement of 
carbon content by the gravimetric method after combustion in tube furnace  
GB/T 223.7 2  The measur ement of sul phur content in iron, steel and alloys by the 
gravimetric method  
GB/T 223.74  Method of chemical analysis of iron, steel and alloys: the measurement of 
non-combined carbon content  
GB/T 223.75  The measurement of boron content in iron, steel and alloys by the 
methanol distillation - curcumin spectrophotometric method  
GB/T 223.76  Method of chemical analysis of iron, steel and alloys: the measurement of 
vanadium content by flame atomic absorption spectrometry  
GB/T 228  Room tempera ture tension test for metal materials  
GB/T 229  Charpy  pendulum impact test for metal materials  
GB/T 232  Bending test for metal materials  
GB/T 247  General regulations on the packing, label ling and quality certificate of steel 
plates and steel bands  GB 19189 -xxxx  
 
5 GB/T 709  The dimensions , appearance , weight and tolerances of hot rolled steel plates 
and steel bands  
GB/T 2970  Ultrasonic test for thick steel plates  
GB/T 2975  Sampling  position and sample preparation for mechanical properties : test of 
steel and steel  products  
GB/T 4336  Spark source atomic emission spectrometry (conventional method) for 
carbon steel and mild & low alloy steel  
GB/T 8170  Rules for rounding off numbers and the expression and judgement of 
limiting values  
GB/T 17505  General technical r equirements for the delivery of steel and steel products  
GB/T 20066  Sampling and sample preparation method for the determination of the 
chemical composition of iron and steel  
GB/T 20123  The measurement of total carbon and sulphur content in iron and ste el by 
infrared spectroscopy after combustion in high -frequency induction 
furnace (conventional method)  
JB/T 4730.3  Nondestructive testing of pressure equipment - Part 3: ultrasonic testing  
 
3  Contents of Ordering  
A contract or order for ordering under t his standard shall include the following:  
a) Standard number;  
b) Name of product;  
c) Grade;  
d) Dimensions ;  
e) Weight;  
f) Additional technical requirements.  
 
4  Method of Grade Expression  
The suffixes 'R' and 'D' of the grades listed in this standard  are the first letters of the 
pinyin  spelling of rong  for 'pressure vessels' and di for 'low temperature'.  
 
5  Dimensions , Appearance , Weight and Tolerances   GB 19189 -xxxx  
 
6 5.1  The dimensions , appearance , weight and tolerances of steel plates shall conform to 
the speci fications in GB/T 709.  
5.2  The tolerances for the thickness of steel plates shall conform to the B -type 
requirements for tolerances in GB/T 709.  
5.2.1  Delivery can be made according to the C -type tolerances in GB/T 709 as required 
by the demand side an d as agreed on by the supply side and the demand side.  
5.3  Steel plates shall be delivered by the theoretical weight. The thickness adopted for 
theoretical weight calculation shall be the arithmetic mean of the maximum thickness and 
minimum thickness of steel plates permitted. The density for calculation shall be 
7.85g/cm3.  
 
6  Technical Requirements   
6.1  Grades and chemical composition  
6.1.1  The grades and chemical composition of steel shall conform to Table 1.  
Table 1 Chemical composition  
 
6.1.2  To improve the properties of steel, micro -alloying elements other than those in 
Table 1 can be added.  
6.1.3  For 07MnMoVR steel plates with a thickness not exceeding 36mm and 
07MnNiMoDR steel plates with a thickness not exceeding 30mm, there can be no lower 
limit for Mo content.  
6.1.4  Tolerances for the chemical composition of finished steel plates shall conform t o 
GB/T 222, with P+0.003% and S+0.002%.  Chemical components (quantity percent) /%  Grade  
C Si Mn P S Cu Ni Cr Mo V B a Pcm a 
07MnMoVR  0.09  0.15- 
0.40 1.20- 
1.60 0.020  0.010  0.25  0.40  0.30  0.10- 
0.30 0.02- 
0.06 0.0020  0.20  
07MnNiVDR  0.09  0.15- 
0.40 1.20- 
1.60 0.018  0.008  0.25  0.20- 
0.50 0.30 0.30  0.02- 
0.06 0.0020  0.21  
07MnNiMoDR  0.09  0.15- 
0.40 1.20- 
1.60 0.015  0.005  0.25  0.30- 
0.60 0.30  0.10- 
0.30 0.06  0.0020  0.21  
12MnNiVR  0.15  0.15- 
0.40 1.20- 
1.60 0.020  0.010  0.25  0.15- 
0.40 0.30  0.30  0.02- 
 0.06 0.0020  0.25  
a Pcm means the composition of welding crack sensitivity. It is calculated by the formula  
Pcm=C+Si/30+(Mn+Cu+Cr)/20+Ni/60+Mo/15+V/10+5B (%)  GB 19189 -xxxx  
 
7 6.2  Smelting method  
Steel is smelted in oxygen converter or electric furnace and subject to vacuum treatment.  
6.3  Delivery state  
6.3.1  Before delivery, s teel plates shall  undergo a quenc hed and tempered heat 
treatment  at a temperature of tempering not lower than 600 .  
6.3.2  Before delivery, s teel plates shall be sheared or flame cut.  
6.4  Mechanical and processing properties  
6.4.1  The mechanical and processing properties of steel plates shall conform to the 
specifications listed in Table 2.  
6.4.2  Charpy  (V-notch) impact energy shall be calculated by the arithmetic mean of 
three samples. A single value of one of them can be under the value specified in Table 2, 
but by no more than 70% of the latter.   
6.4.3  For steel plates with a thickness of less than 12mm, a  supplementary sample shall 
be used for the Charpy  (V-notch) impact test. The dimensions of the supplementary 
sample shall be 7.5mm×10mm×55mm, and the test result shall not be less than 75% of 
the value specified in Table 2.  
6.4.4  For steel plat es with a  thickness exceeding 36mm, a set of impact samples can be 
added at half of the thickness as required by the demand side and as agreed on by the 
supply side and the demand side. The norm of impact shall be agreed on by both sides.  GB 19189 -xxxx  
 
8 Table 2 - Mechanical and  processing properties  
Tensile test  Impact test  Bending 
test Grade  Thickness 
of steel 
plate  
/mm Yield 
strengtha 
ReL 
/MPa  Tensile 
strength  
Rm 
/MPa   Elongation 
percentage 
after 
fracture  
A/% Temperature  
/ Impact 
energy 
absorption  
KV 2 /J 180°  
b=2a  
07MnMoVR  10-60 490  610-730 17 -20 80 d=3a  
07MnNiVDR  10-60 490  610-730 17 -40 80 d=3a  
07MnNiMoDR  10-60 490  610-730 17 -50 80 d=3a  
12MnNiVR  10-60 490  610-730 17 -20 80 d=3a  
a If yield is not obvio us, adopt R p0.2. 
 
6.5  Surface quality   
6.5.1  Defects such as cracks, bubbles, scars, folds and impurities on the surface of steel 
plates shall not be allowed. If such defects exist, the clearing of them is permitted. The 
depth of clearing shall be measu red from the actual dimensions of a steel plate and shall 
not exceed half of the common difference of its thickness; it shall also maintain  the 
minimum thickness of the steel plate. The cleared part shall be smooth and without edges 
or corners. Steel plate s shall not be layered.  
6.5.2  Other defects are allowed. Their depth shall be measured from the actual 
dimensions of a steel plate and shall not exceed half of the permitted common difference 
of its thickness. It shall also be guaranteed that the thickne ss of the defective part shall 
not be less than the minimum thickness of the steel plate.  
6.6  Ultrasonic testing  
Ultrasonic testing shall be carried out for steel plates one by one. The method shall 
conform to JB/T 4730.3 or GB/T 2970 and the conformity level shall be Level I.  
6.7  Special  requirements  
Special requirements can be raised for steel plates as agreed on by the supply side and the 
demand side and as specified in the contract.  
 GB 19189 -xxxx  
 
9 7  Test Method  
7.1  The test items, number of samples, method of  sampling and test method for each 
batch of steel plates shall conform to the specifications listed in Table 3.  
 
Table 3 Test items, number of samples and test method  
Number  Testing item  Number of 
samples  Sampling 
method  Sampling 
direction  Test method  
1 Chemical 
analysis  1 from each 
furnace  GB/T 20066  - GB/T 223, 
GB/T4336,  
GB/T20123  
2 Tensile test  1 from each 
set GB/T 2975  Transverse  GB/T 228  
3 Impact test  3 from each 
set GB/T 2975  Transverse  GB/T 229  
4 Cold bending 
test 1 from each 
set GB/T 2975  Trans verse  GB/T 232  
5 Ultrasonic 
testing  Sheet by 
sheet  - - JB/T 4730.3 
or GB/T 
2970  
6 Dimensions and 
appearance  Sheet by 
sheet  - - Measuring 
tool with 
required 
precision  
7 Surface  Sheet by 
sheet  - - Visual 
observation  
 
7.2  The samples for tensile test, im pact test and cold bending as specified in Table 3 
can be taken from a single specimen, which shall be taken at 1/4 of the width of a steel 
plate. If the steel  plate  is less than 15m long after heat treatment, take the specimen at one 
end of it; if it is m ore than 15m long after heat treatment, take one specimen at each end. 
Take a set of samples from each specimen (1 for tensile test, 3 for impact test and 1 for 
cold bending). Specimens can be sheared or flame cut, but the dimensions must guarantee  
that th e samples are clear of the hardened part or heat -affected part caused by shearing or 
flame cutting.  GB 19189 -xxxx  
 
10 7.3  The axis of the samples for tensile test, impact test and cold bending  as specified in 
Table 3 shall be perpendicular to the rolling direction of the steel plate; the axis of the 
notch of the Charpy  (V-notch) impact sample shall be perpendicular to the rolling surface 
of the steel plate.  
7.4  The sampling position for tensile test and impact test shall conform to 
specifications in GB/T 2975. For steel plates more than 25mm thick, the axis of the 
impact sample shall be at 1/4 of the thickness. The cold bending sample for a steel plate 
of any thickness shall retain at least one rolling surface, which shall be the outer surface 
for the bending test.  
 
8  Inspection Rules  
8.1  The inspection of steel plates shall be carried out by the quality inspection 
authorities  of the supply side . The demand side is entitled to inspection and acceptance 
according to this standard.  
8.2  Steel plates shall be divided int o sets of heat treatment sheets and inspected for 
acceptance  set by set.  
8.3  If test results do not conform to the foregoing requirements in this standard, the 
testing process can be repeated.  
8.3.1  If the results of impact test do not conform to Article 6.4.1 of this standard, three 
more samples shall be taken from the same steel plate for testing. The arithmetic mean of 
the impact energy of the six samples in the first and second sets shall not be u nder the 
specified value. The impact energy absorption of two of the samples can be under the 
specified value, but there shall only be  one sample  with  an impact energy absorption less 
than 70% of the specified value.  
8.3.2 The re -testing and judgment of t he other testing items shall be carried out according 
to applicable specifications in GB/T 17505.  
 
9  Packing, Labe lling and Quality Certificate   
The packing, labe lling and quality certificate of steel plates shall conform to 
specifications in GB/T 247.  
 
10  Rounding Numbers  
The rounding of numbers shall conform to GB/T 8170.  
 GB 19189 -xxxx  
 
11 Appendix A  
(Informative Appendix)  
Comparison between New and Old Standard Grades  
See Table A.1 for a comparison between the grades in this standard and those in 
GB19189 -2003.  
 Table A.1  
GB19189 -20XX  GB19189 -2003  
07MnMoVR  07MnCrMoVR  
07MnNiVDR  07MnNiMoVDR  
07MnNiMoDR   
12MnNiVR  12MnNiVR