This standard specifies the technical requirements, test methods, inspection rules, etc. for steel used in large pressure vessel forgings. JB/T 6400-1992 Steel used in large pressure vessel forgings JB/T6400-1992 Standard download decompression password: www.bzxz.net

Mechanical Industry Standard of the People's Republic of China
JB/T 6400-1992
Steel for Large Pressure Vessel Forgings
Published on 1992-07-14
Implementation on 1993-07-01 by the Ministry of Machinery and Electronics Industry of the People's Republic of China
Mechanical Industry Standard of the People's Republic of China
Steel for Large Pressure Vessel Forgings
1 Subject Content and Scope of Application
JB/T6400-1992
This standard specifies the technical requirements, test methods, inspection rules, etc. for steel for large pressure vessel forgings. This standard applies to steel for large pressure vessel forgings in the petrochemical industry with a design pressure not exceeding 34.3MPa. 2
Cited standards
GB2106
3 Technical requirements
3.1 Chemical composition
Chemical analysis methods for steel and alloys
Metal tensile test methods
Metal Charpy (U-notch) impact test methods Metal Brinell hardness test methods
Metal Charpy (V-notch) impact test methods Technical conditions for pressure vessel forgings
The chemical composition of steel shall comply with the provisions of Table 1.
The allowable deviation of the analysis results of finished products shall comply with the provisions of Table 2. 3.1.2
3.2 Mechanical properties
The room temperature mechanical properties of steel shall comply with the provisions of Table 3. 3.2.1
The low temperature impact properties of steel shall comply with the provisions of Table 4. 3.3 Ultrasonic flaw detection
Ultrasonic flaw detection of steel shall be carried out in accordance with the relevant provisions of JB755. When the purchaser has other special requirements, the supply and demand parties shall negotiate separately. 3.4
4 Test methods and rules
4.1 Test methods
Chemical analysis methods shall be carried out in accordance with GB223. Tensile tests shall be carried out in accordance with GB228.
Room temperature impact tests shall be carried out in accordance with GB229 or GB2106. Low temperature and 4.4℃ impact tests shall be carried out in accordance with GB2106. Hardness tests shall be carried out in accordance with GB231.
4.2 Sampling rules
Chemical composition analysis
4.2.1.1 For each furnace or each package of molten steel, an analysis sample shall be taken during the pouring process for chemical composition analysis. The results of the analysis of the method approved by the Ministry of Machinery and Electronics Industry on July 14, 1992 and implemented on July 1, 1993 shall be reported for steel ingots cast in multiple furnaces.
JB/T 6400-1992
4.2.1.2 If the sample is lost or not suitable for chemical analysis, another replacement sample can be taken from the appropriate part of the ingot surface. 4.2.1.3 When the purchaser requires finished product analysis, a representative forging forged from each smelting furnace number or multiple-package cast ingot can be analyzed. The sample can be taken from the forging body or its extension. For discs or solid forgings, samples are taken at any point between half the radius and the diameter; for hollow forgings or ring forgings, samples are taken at half the wall thickness; the sample can also be taken from the broken mechanical properties sample.
4.2.2 Mechanical properties
The sampling position and quantity of forgings shall be carried out in accordance with JB755. 5 Retest
If any result of the mechanical properties test is unqualified, double samples shall be taken for retest. If one sample fails the retest, it can be reheat treated. After the heat treatment, a group of samples (1 tensile sample, 3 impact samples) are cut for testing. The number of reheat treatments shall not exceed 2 times (tempering times are not counted). 2
09Mn2VDl)
20MnMo
15MnMoV
20MnMoNb
32MnMoVB
35CrMe
12CrIMov
12Cr2Mo1
ICrSMo
20MnNiMo%
40CrNi2MoA
12Ni3MoV
1Cr18Ni9Ti
Previous: 1) "D" in the steel grade means low temperature use: Mn
2) 15Mo is the conversion of German DIN 17175 15Me3 standard Chinese steel grade; 3) 20MnNiMo is the copper grade converted from American ASTMSA508C13, chemical composition
Continued Table 1
Cu≤0.25
AI≥0.015
Nb 0.025~0.050
B0.005 (addition amount)
Ca≤0.20
Ca≤0.10
Ti5× (C%0.02) -0.80
JB/T 6400-1992
JB/T6400-1992
20MnMo
15MnMoV
20MnMoNb
32MnMoVB
15CrMo
35CrMo
12Cr1MoV
12Cr2Mo1
ICr5Mo
20MnNiMo
40 CrNi2MoA
12Ni3Mov
1Cr18NigTi
Previous: 1) "D" in the copper number indicates low-temperature steel: -1.60
2) 15Mo is the copper number converted from the German DIN1717515Me3 standard; 3) 20MnNiMo is the copper number converted from the American ASTMSA508C13, ≤0.035
Continued Table 1
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Nb 0.025~0.050
B 0.005 (addition amount)
Ca≤0.20
Cu≤0.10
Ti5× (C%0.02) 0.80
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64001992
JB/T64001992
Base or maximum
Specified range
>0.05-0.10
>0.10-0.25
>0.25-0.55
>0.030-0.060
>0.90-2.10
>2.1010.00
>10.00-15.00
>15.0 020.00
Base or maximum
Specified range
>1.00-2.00
>2.00-5.30
>5.30-10.00
>0.20-0.40
>0.40-1.15
>0.10-0.25
>0.25-0.50
≤650
≥650
Permissible deviation value of finished product analysis exceeding the upper and lower limits specified in Table 2
>650-1 300
>650~1 300
>1 300-2 600
Continued Table 2
>1 300-2 00
Western areacm
>2 600-5 200
>2 600-5 200
Note: The cross-sectional area refers to the maximum cross-sectional area of ​​the rough forging (excluding the center hole); the maximum cross-sectional area of ​​the forging; the maximum cross-sectional area of ​​the copper bar. >5 200~10 300
>5 200~10 300
>10 300
>10 300
JB/T 6400-1992
JB/T 64001992
base or maximum
specified range
>1 .00-2.00
>2.00~-5.30
>5.30-10.00
>0.20-0.40
>0.40-1.15
>0.10-0.25
>0.25-0.50
≤650
>650-1 300
Continued Table 2
>1 300-2 600
Hundred product cm
>2 600-5 200
Note: The cross-sectional area refers to the maximum cross-sectional area of ​​the rough-machined forging (excluding the center hole); the maximum cross-sectional area of ​​the forging; the maximum cross-sectional area of ​​the copper. Room temperature mechanical properties
09Mn2VD
Sectional size
(diameter or thickness》
≤100
>100-300
>100-300
≤ 100
>100-300
≤100
>100-300
>100-300
>100-300
≤100
>100~400
Heat treatment state
Normalizing or normalizing + tempering
Normalizing or normalizing + tempering
Normalizing or normalizing + tempering
Normalizing or normalizing + tempering
Normalizing or normalizing + tempering
Normalizing Big or normalizing + national fire
normal or normalizing + tempering
normalizing or normalizing + tempering
ping fire + eye fire
ping fire + eye fire
zhang fire + dan fire
normalizing + national fire
jiao fire + national fire
qin fire + moon fire
normalizing + moon fire
or pure fire + tempering
normalizing or normalizing + national fire
normalizing or normalizing + tempering
normalizing or normalizing + dan fire
normalizing + dan fire
pure fire + national fire
, (e 42)
not less than
>5 200~10 300
Ae (Akv)
>10 300
109-156
103-156
103~156
110-170
110-17 0
110-170
156-217
121-187
143-187
179-225||t t | 76~197
JB/T 6400-1992
JB/T 6400-1992
09Mn2VD
20MmMo
15MnMoV
20MnMoNb
32MnMoVB
15CrMe
12Cr1MoV
12Cr2Mel
1 2Ni3MoV
ICr5Me
20MnNiMo
40C rNi2MoA
ICr18Ni9Ti
Cross-section size
(diameter or thickness)
≤100
>100~300
≤100
>100-300
>100-300
≤100
>100-300
>100300
≤ 100 |
≤100
>100-300
≤ 200
≤100
>100~300
≤100
Heat treatment state
Normalizing or normalizing + national tempering
Normalizing or normalizing + national tempering
Normalizing or normalizing + national tempering
Normalizing or normalizing + national tempering
Normalizing or normalizing + national tempering
Normalizing or normalizing + tempering
Normalizing or normalizing + tempering
Normalizing or normalizing + tempering
Pinghuo + Rihuo
Jinhuo + Danhuo
Pinghuo + Danhuo
Normalizing + Tonghuo
Jiaohuo + Muhuo
Qinhuo + Yuehuo
Normalizing + Yuehuo
Or Chunhuo + Yuehuo
Normalizing or normalizing + tempering
Normalizing or normalizing + tempering
Normalizing or normalizing + Muhuo
Normalizing + Muhuo
Chunhuo + Tonghuo
Heat treatment state
Jinhuo+Qiehuo
Jinhuo+Muhuo
Normalizing or normalizing+tempering
Normalizing+Danhuo
Or Pinghuo+Guohuo
Zhanghuo+Yuehuo
Normalizing+Yuehuo
Or Yanghuo+Huo
Huo+Danhuo
Yuehuo+Yuehuo
Chunhuo+Muhuo
Zhanghuo+Yuehuo
Jinhuo+Muhuo
Huo+Yuehuo||tt| |fire+moon fire
Jiang fire+moon fire
normal fire+fire
or Ting fire+sun fire
Zhang fire+dan fire
Jiang fire+fire
Ping fire+tong fire
Jin fire+dan fire
Ping fire+mu fire
fire+dan fire
normal fire+dan fire
or Jin fire+mu fire
Ping fire+tong fire
solidification treatment
Table 3 Mechanical properties at room temperature
, (ea)
not less than
Continued Table 3
,(e a2)
not less than
550-725
550-725
(345)
A (Akv)
109 ~156
103-156
103-156
110~170
110-170
110-170
156-217
121-187
143-187
179-225
156-2 07
121~187
162-217
149-217
217-255
116-179
120-180| |tt||116-179
116-179
176~197
154-217
149217|| tt||156-228
187228
168-228
163-241
187229
176229
168~229|| tt||170-255
116-179
116-179
197-269
18 7269
≤170
≤200
187228
156241
168-229
168-229
302- 375
302-375
for unblocking base 140
156-241
≤190
JB/T 64001992
JB/T 64001992
20MmMo
15MnMoV
20MnMoNb
32MnMoVB
15CrMe
12Cr1MoV
12Cr2Mel| |tt||12Ni3MoV
ICr5Me
20MnNiMo
40CrNi2MoA
ICr18N i9Ti
20MnNiMo
20MnMo
20MnMoNb
09Mn2VD
12Ni3MoV
Additional instructions:
Cross-section size||tt| |(diameter or thickness)
>100-300
>100300
>300500
>500-800
≤300
≤100||t t||>100300
≤100
>100-300
≤100
Heat treatment state
Zhanghuo+Yuehuo
Chunhuo+huo
zhenghuo or zhenghuo+guohuo
Chunhuo+yuehuo
zhenghuo+yuehuo
or yanghuo+yuehuo|| tt||Pinghuo+Muhuo
Chunhuo+Muhuo
Chunhuo+Muhuo
Pinghuo+Yuehuo
Zhanghuo+Danhuo|| tt||Chunda+Yueda
Pinghuo+Yuehuo
Jianghuo+Yuehuo
Zhengda+Yuehuo
or Pinghuo+Muhuo|| tt||Zhanghuo+Danhuo
Jianghuo+Muhuo
Chunhuo+Tonghuo
Zhanghuo+Guohuo
Jinhuo+Qiehuo|| tt||Huo+Danhuo
Pingda+Yuehuo
Solution treatment
Continued Table 3
550-725
550-725| |tt||, (e a2)
Not a kid
JB/T6400-1992
Forging low temperature and 4.4℃ impact performance
Test temperature
This standard is provided by Mechanical and Electronic
The lowest average value of a group of three samples
Ake (An)
154-217
149-217
156-228
187228
168-228www.bzxz.net
163-241| |tt||187229
176-229
168-229
170~255
116179
116-179
197269
187269
≤1%0
≤200
187228
156241
168-229
168-229
302-375
302-375
As opening pad≤140
156-241
≤190
For single sample Minimum value
JB/T 64001992
20MnNiMo
20MnMo
20MnMoNb
09Mn2VD
12Ni3MoV
Additional instructions:
Test temperature||tt| |JB/T6400-1992
Low temperature and 4.4℃ impact properties of forgings
The lowest average value of three samples in a group
This standard is issued by Deyang Large Castings and Forgings Research Institute of the Ministry of Machinery and Electronics Industry This standard was drafted by the Deyang Large Castings and Forgings Research Institute of the Ministry of Machinery and Electronics Industry. The main drafter of this standard is Zeng Fanjiu.
The minimum value of a single sample4℃ impact performance
Test temperature
This standard is provided by Mechanical Electronics
The lowest average value of a group of three specimens
Ake (An)
154-217
149-217
156-228
187228
168-228
163-241
187229
176-229
168-229
170~255
116179
116-179
197269
187269
≤1%0
≤200
187228
156241
168-229
168-229
302-375
302-375
As opening pad≤140
156-241
≤190
Minimum value of a single sample
JB/T 64001992
20MnNiMo
20MnMo
20MnMoNb
09Mn2VD
12Ni3MoV
Additional notes:
Test temperature
JB/T6400-1992
Low temperature and 4.4℃ impact properties of forgings
The lowest average value of three samples in a group
This standard is proposed and managed by the Deyang Large Castings and Forgings Research Institute of the Ministry of Machinery and Electronics Industry. This standard is drafted by the Deyang Large Castings and Forgings Research Institute of the Ministry of Machinery and Electronics Industry. Zeng Fanjiu is the main drafter of this standard.
The lowest value of a single sample4℃ impact performance
Test temperature
This standard is provided by Mechanical Electronics
The lowest average value of a group of three specimens
Ake (An)
154-217
149-217
156-228
187228
168-228
163-241
187229
176-229
168-229
170~255
116179
116-179
197269
187269
≤1%0
≤200
187228
156241
168-229
168-229
302-375
302-375
As opening gasket≤140
156-241
≤190
Minimum value of a single sample
JB/T 64001992
20MnNiMo
20MnMo
20MnMoNb
09Mn2VD
12Ni3MoV
Additional notes:
Test temperature
JB/T6400-1992
Low temperature and 4.4℃ impact properties of forgings
The lowest average value of three samples in a group
This standard is proposed and managed by the Deyang Large Castings and Forgings Research Institute of the Ministry of Machinery and Electronics Industry. This standard is drafted by the Deyang Large Castings and Forgings Research Institute of the Ministry of Machinery and Electronics Industry. Zeng Fanjiu is the main drafter of this standard.
The lowest value of a single sample
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