Some standard content:
GB3531-1996
Foreword
This standard is a revised version of GB3531-83. The newly revised standard has made the following changes to the previous standard: the grades 06MnNbDR and 09MnTiCuREDR in the previous standard have been cancelled, and 09MnNiDR and 15MnNiDR have been added; the phosphorus and sulfur content in steel has been reduced, and the phosphorus content of each grade of steel has been reduced from 0.030% to 0.030%. ~0.035% was reduced to 0.025%~0.030%, and the sulfur content was reduced from 0.030%~0.035% to 0.020%~0.025%; the thickness specification of the steel plate was expanded, and the maximum thickness was increased from 40mm to 100mm; the low-temperature V-type of the steel plate was improved The impact energy index has been increased from 21J to 24J~27J for transverse specimens; the V-shaped impact test temperature of 09Mn2VDR steel has been changed from -70℃ to -50℃ to maintain the good impact performance of this grade at this test temperature; ||tt ||The standard for ultrasonic flaw detection of steel plates was changed from the agreement between the two parties to the national standard for flaw detection. This standard is proposed by the Ministry of Metallurgical Industry of the People's Republic of China. This standard is under the jurisdiction of the National Steel Standardization Technical Committee. This standard is drafted by Chongqing Iron and Steel (Group) Company. The main drafters of this standard: Tang Zinan, Huang Ziheng, Jiang Zhengguo, Qin Xiaozhong, and Tang Yifan. This standard was first released in March 1983 and revised in December 1994. This standard will be implemented on October 1, 1996.
GB3531-83 will be invalidated from the date of entry into force of this standard. Scope
National Standard of the People's Republic of China
Low alloy steel plates for lowtemperature pressure vessels
Low alloy steel plates for lowtemperature pressure vesselsGB3531—1996
Replaces GB3531—83||tt ||This standard specifies the dimensions, appearance, technical requirements, test methods, inspection rules, packaging, marking and quality certificates of low alloy steel plates for cryogenic pressure vessels.
This standard is applicable to the manufacture of low-alloy steel plates with a thickness of 6mm to 100mm for low-temperature pressure vessels at 20℃~70℃. Reference standards
See Appendix A for reference standards.
3
Size, shape, weight and allowable deviation
3.1 The size, shape and allowable deviation of the steel plate should comply with the regulations of GB709. 3.2 The thickness deviation of the steel plate should comply with the provisions of Table 1. 3.3 The steel plate is delivered according to the theoretical weight. The nominal thickness plus the thickness additional value in Table 2 is used as the theoretical thickness for calculating the weight. The density of steel is 7.85g/cm. |tt||表
度
宽
3
3
2
2
0||tt ||7
7
入
差
偏
英
瘦
独
差
偏
正
8
o
a
o
5
o| |tt||0
o
8
5
o
5
a
s2~9| |tt||5
1
5
1
5
1
%
1||tt ||0
o
0
o
0
o
品
o
5
5
o
5
~
7
5
1
5| |tt||1
5
1
1
%
1
5
a||tt ||5
o
5
o
o
5
5
0
o
GB3531—1996
1
5
5
1
5
1
5
1
5
o
5
o
5
o
入| |tt||8
1
1
5
1
5
1
5||tt ||1
0
8
o
5
0
~
2
1
5
1
5
1
5
%
1
0| |tt||5
o
-
~084
入
25
2
2|| tt||5
5
5
5
5
5
~
2||tt| |5
2
5
2
0
2
5
1
5
1
5
1
5
1
4
1
5|| tt||1
9~0
5
2
2
5
2
5|| tt||2
2
5
2
5
1
5
1||tt| |5
1
09~0
5
2
5
2
5||tt| |2
8
2
2
2
5
2
5
2
2
5
2
5
2
2
08~094
入
5
3
5
3
5
3
5
3|| tt||5
3
0
3
0
3
5
2||tt| |5
2
5
2
2
0
A
m
值
加
厚
2
表
度
觉
008
009|| tt||%
2
1
009
2
公
值
度||tt| |厚
的
最
重
算
0
o
25
o
5
o
o
0
o
8
o
5|| tt||o
0
92~9
5
0
5
0
5|| tt||8
o
8
o
8
o
o
o||tt| |0
o
5
o
2
o
o1~9<
5||tt ||o
0
0
0
0
4
o
5
o
5
0
0
0
o
o
2
o| |tt||3
[~o1
入
5
o
o
5
o| |tt||5
5
o
5
o
5
o
0||tt ||5
o
5
o
入
GB3531—1996
8
o||tt ||5
0
0
5
o
o
o
0
5
0
0
o
~
入
8
o
8| |tt||0
o
0
5
o
5
o
4||tt ||o
0
4
o
o
>
0
1
5
5
o
o
o
5
o
0
o| |tt||5
5
o
~
0
1
5
5||tt ||o
0
o
0
5
0
o
0
0
0
0s~f
入
5
1
5
1
5
5
8
o
8
o
09~054
入
5
1
1
0
1
0
1
1
0| |tt||1
5
1
5
1
5
1
5||tt ||1
8
3～09
45
5
1
5
1
1
5
4
1|| tt||0
1
1
1
1
001~08
4 technical requirements
Grade and chemical composition
4.1
GB3531-1996
The steel grade and chemical composition (smelting analysis) should comply with the provisions of Table 3. Table 3 Chemical composition
Chemical composition, % (m/m)
Grade
16MnDR
15MnNiDR
09Mn2VDR
09MnNiDR|| tt||C
≤0.20
≤0.18
≤0.12
≤0.12
Si
Mn
0.15 ~0.501.20~1.60
Ni
0.15~0.501.20~1.600.20~0.60
0.15~0.501.40~1.80
0.15~0.501.20 ~1.600.30~0.80
V
≤0.06
0.02~0.06
4.1.1 In order to improve the performance of steel, trace amounts of V, Ti and Nb can be added , RE and other elements. Nb
≤0.04
Als
≥0.015
≥0.015
≥0.015
≥0.015
P|| tt|| is not greater than
0.030
0.030
0.030
0.025
S
0.025
0.025||tt ||0.025
0.020
4.1.2 The content of residual elements chromium and copper should not be greater than 0.25%, the nickel content should not be greater than 0.40%, and the molybdenum content should not be greater than 0.08%. If the supplier can guarantee it, analysis may not be performed.
4.1.3 The Als content of acid-soluble aluminum can be replaced by measuring the total aluminum content. In this case, the aluminum content should not be less than 0.020%. 4.1.4 The allowable deviation of chemical composition analysis of finished steel plates shall comply with the provisions of Table 1 of GB222. 4.2 Smelting method
Steel is smelted by oxygen converter, open hearth, and electric furnace. 4.3 Delivery status
Steel plates are delivered in normalized or normalized and tempered status. 4.4 Mechanical properties and process properties
4.4.1 The tensile and cold bending tests of steel plates should comply with the requirements in Table 4. Table 4 Mechanical properties and process properties
Steel plate thickness
Brand
No.
16MnDR
15MnNiDR
09Mn2VDR
mm
6~16bzxz.net
>16~36
>36~60
≥60~100
6~16
>16 ~36
>36~60
6~16
>16~36
Tensile strength.
MPa
490~620
470600
450~580
450~580
490~630
470 ~610
460~600
440~570
430~560
Yield point,
MPa
315||tt| |295
275
255
325
305
290
290
270
No Less than
elongation
%
21
20
22
cold bending test
6=2a| |tt||180°
d-2a
d=3a
d=3a
d=2a
brand
No.
09MnNiDR
Steel plate thickness
mm
6~16
>16~36
>36~60
GB3531-1996
Table 4 (End)
Tensile strength
MPa
440~570
430~560
430~ 560
2 Charpy (V-notch) low temperature impact test shall comply with the provisions of Table 5, 4.4.2
yield point.
MPa
300
280
260
Table 5 Impact Test
Brand
No.
16MnDR
15MnNiDR
09Mn2VDR
09MnNiDR
Steel plate thickness
6~36
>36~100
6~ 60
6~36
6~60
Minimum test temperature
℃
40
30
-45
50
-70
not less than
elongation%
%
23
sample direction| |tt||Transversal
Cold bending test
b=2a
180°
d- 2a
Impact power, AkvJ
Not less than
24
27
4.4.2.1 Table 5 lists the impact energy of the 10mm×10mm×55mm standard specimen. When using 7.5mm×10mm×55mm or 5mm When small size specimens of ×10mm×55mm are subjected to impact tests, the test results shall not be less than 75% or 50% of the values ??specified in Table 5 respectively.
4.4.2.2 Charpy (V-notch) low temperature impact energy is calculated based on the arithmetic mean of the single values ??of a set of three samples. The single value of one sample is allowed to be lower than the specified value, but it shall not be lower than 70% of the specified value. 4.4.2.3 Upon agreement between the supplier and the buyer and stated in the contract, the low-temperature impact energy of 16MnDR steel plates can be delivered at not less than 27J; the low-temperature impact energy of 15MnNiDR, 09Mn2VDR, and 09MnNiDR steel plates can be delivered at not less than 34J. 4.5 Surface quality
4.5.1 The surface of the steel plate shall not have defects such as cracks, rips, bubbles, scars, folds and inclusions. If there are any of the above defects, cleaning is allowed. The cleaning depth shall not exceed half of the thickness tolerance calculated from the actual size, and the minimum thickness of the steel plate shall be guaranteed. The cleaning area should be smooth and without edges. Steel plates must not be delaminated.
4.5.2 In addition to the provisions of 4.5.1, other defects are allowed to exist, and their depth shall not exceed half the thickness tolerance of the steel plate calculated from the actual size of the steel plate, and the minimum thickness of the steel plate shall be guaranteed. 4.6 Ultrasonic flaw detection
4.6.1 For steel plates with a thickness greater than 20mm, the supplier shall conduct ultrasonic flaw detection one by one. For steel plates with a thickness of no more than 20mm, the supplier may also perform ultrasonic flaw detection upon agreement between the two parties and it shall be noted in the contract. 4.6.2 The standard for flaw detection method shall be in accordance with GB/T2970. The qualification level shall be stipulated by agreement between the supplier and the buyer and shall be noted in the contract. bright. 5
Test method
5.1 The inspection items, sampling quantity, sampling method and test method of each batch of steel plates should comply with the provisions of Table 6. Serial number
1
2
3
4
5
Inspection items
Chemical analysis (smelting analysis)| |tt||Tensile
Cold bending
Low temperature impact
Ultrasonic flaw detection
GB3531-1996
Table 6 test method
Sampling Quantity, pieces
1(each tank number)
1
1
3
one by one
5.2The sample specifications used in the Charpy (V-notch) low temperature impact test are as shown in Table 7. Table 7 Sample size
Steel plate thickness
≥12
>8~11
≥6~8
6 Inspection rules
Sampling method
GB222
GB2975
Sample size
10×10×55
7.5×10×55
5×10 ×55
Test method
GB223
GB228
GB232
GB4159
GB/T2970
mm||tt ||6.1 Steel plates should be accepted in batches, and each batch should be composed of steel plates of the same grade, the same furnace number, the same thickness, and the same heat treatment system. The weight of each batch of steel plates with a thickness of 6mm~16mm shall not exceed 15t, and the weight of each batch of steel plates with a thickness greater than 16mm shall not exceed 25t. 6.2 Upon agreement between the two parties and stated in the contract, steel plates with a thickness greater than 16mm can be tested for mechanical properties one by one. 6.3 For steel plates with a thickness greater than 60mm, tensile specimens and impact specimens should be taken from a quarter of the thickness (the distance between the axis of the specimen and a rolling surface). The distance between the specimen and any edge of the steel plate should not be less than the thickness of the steel plate (but the head and clamping parts of the tensile specimen are not subject to this restriction). 6.4 Retest
6.4.1 When the impact energy of the Charpy (V-notch) low-temperature impact test is less than that specified in 4.4.2, another set of three samples should be taken from the same steel plate or the same specimen. During the test, the arithmetic mean of the two groups of six samples before and after shall not be lower than the specified value, but two samples are allowed to be smaller than the specified value, and only one sample is allowed to be less than 70% of the specified value. 6.4.2 The re-inspection of other items shall comply with the provisions of GB247. 7 Packaging, marking and quality certificate
The packaging, marking and quality certificate of the steel plate shall comply with the relevant provisions of GB247. GB3531-1996
Appendix A
(Appendix to the standard)
Quoted standards
The following standards contain provisions that, by being quoted in this standard, constitute part of this standard For clauses, the versions shown are valid at the time of publication of the standard. All standards are subject to revision. All parties using this standard should explore the possibility of using the latest version of the following standards. GB 222-84 | - 88 Chemical Analysis Method for Steel and Alloys Determination of Manganese Content by Ammonium Nitrate Oxidation Capacity Method GB223.9-89 Chemical Analysis Method for Steel and Alloys Chromium Azure S Photometric Method for Determination of Aluminum Content GB/T223.10 - 91 Chemical Analysis Method for Steel and Alloys Copper Separation of Iron Reagent - Determination of Aluminum Content by Chromium Azure S Photometric Method GB/T223.11-91
Chemical Analysis Method for Steel and Alloys Determination of Chromium Content by Ammonium Persulfate Oxidation Capacity Method GB223.14-89 Chemical Analysis of Steel and Alloys Method: Determination of vanadium content by molybdenum reagent extraction photometry GB/T223.16-91
Methods for chemical analysis of steel and alloys Determination of titanium content by chromotropic acid photometry GB/T223.17-89 Chemical analysis methods of steel and alloys diantipyrine Determination of titanium content by methane photometry GB/T223.18-944
Methods for chemical analysis of steel and alloys Steel thiosulfate-Iodometric method for determination of copper GB223.19-89 Methods for chemical analysis of steel and alloys New cuproline- Determination of copper amount by chloroform extraction photometric method GB/T223.23-94
Chemical analysis method for steel and alloys Determination of nickel by diacetyl nickel direct photometry GB/T223.24-94
GB223. 26—89
GB223.27—84
GB223.39—85
GB223.40—85
Methods for chemical analysis of steel and alloys diacetyl-trichloride Methane extraction photometric method for determination of nickel, steel and alloy chemical analysis method Thiocyanate direct photometric method for determination of molybdenum content Chemical analysis method of steel and alloy
Chemical analysis method of steel and alloy
Chemical analysis method of steel and alloy
GB223.49-85. Methods for chemical analysis of steel and alloys GB 223.54-87
GB223.58-87
GB 223.59-87
GB 223.60-87| |tt||GB 223. 61-87
GB223.62—87
GB223.63—88
GB223.64—88
GB 223.67—89| | tt | Determination of saw amount by sulfonol S photometric method
Ion exchange separation - Determination of saw amount by chlorosulfenphenol S photometric method Extraction and separation - Determination of total rare earth amount by azochloroline mA photometric method Determination of nickel amount in steel by flame atomic absorption spectrophotometry and alloy chemical analysis methods
Sodium arsenite-sodium nitrite titration method for determination of manganese content Chemical analysis methods for steel and alloys
Chemical analysis methods for steel and alloys
Chemical analysis for steel and alloys Methods
Chemical Analysis Methods for Steel and Alloys
Chemical Analysis Methods for Steel and Alloys
Chemical Analysis Methods for Steel and Alloys
Determination of Phosphorus Amount by Antimony Phosphorus Molybdenum Blue Photometry|| tt||Determination of silicon content by perchloric acid dehydration gravimetric method
Determination of phosphorus content by ammonium phosphomolybdate volumetric method
Determination of phosphorus content by butyl acetate extraction photometric method
Sodium periodate (Block) Determination of manganese content by photometric method
Determination of manganese content by flame atomic absorption spectrometry
Chemical analysis method for steel and alloys
Determination of sulfur content in steel by reduction distillation-methylene blue photometry and alloy chemical analysis methods
Determination of sulfur content by combustion-potassium iodate volumetric method
Chemical analysis method of steel and alloys
Determination of carbon content by combustion gas volumetric method
GB/ T 223.71—91
Methods for chemical analysis of steel and alloys 2
Determination of carbon content by combustion gravimetric method
GB/T223.72—91
Methods for chemical analysis of steel and alloys | |tt | Uncombined carbon content GB/T223.76—94
Chemical analysis method for steel and alloy Determination of vanadium content by flame atomic absorption spectrometry Metal tensile test method
GB228—87
GB229— 94
GB232—88
Metal Charpy notch impact test method
Metal bending test method
GB247—88
GB709—88||tt| |GB3531-1996
General provisions for acceptance, packaging, marking and quality certificates of steel plates and steel strips Dimensions, shapes, weights and allowable deviations of hot-rolled steel plates and steel strips GB/T2970-91 Ultrasonic flaw detection of medium-thick steel plates Inspection method GB2975-82
Sampling regulations for steel mechanical and process performance testing1 When the impact energy of the Charpy (V-notch) low-temperature impact test is less than that specified in 4.4.2, a group of three specimens shall be taken from the same steel plate or the same sample for testing. The arithmetic mean of the six specimens in the two groups before and after shall not be less than the specified value, but two specimens are allowed to be less than the specified value, and only one specimen is allowed to be less than 70% of the specified value. 6.4.2 The retest of other items shall comply with the provisions of GB247. 7 Packaging, marking and quality certificate
The packaging, marking and quality certificate of steel plates shall comply with the relevant provisions of GB247. GB3531-1996
Appendix A
(Appendix to the standard)
Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When the standard is published, the versions shown are valid. All standards will be revised. All parties using this standard should explore the possibility of using the latest versions of the following standards. GB222-84
Sampling method for chemical analysis of steel and allowable deviation of chemical composition of finished products GB223.3-88 Chemical analysis methods for steel and alloys Antipyryl methane phosphomolybdic acid gravimetric method for determination of phosphorus content GB223.4-88 Chemical analysis methods for steel and alloys Ammonium nitrate oxidation volumetric method for determination of manganese content GB223.9-89 Chemical analysis methods for steel and alloys Chrome azure S photometric method for determination of aluminum content GB/T223.10-91 Chemical analysis methods for steel and alloys Copper iron reagent separation Ion-chrome azurol S spectrophotometric determination of aluminum content GB/T223.11-91
Methods for chemical analysis of steel and alloys Ammonium persulfate oxidation volumetric determination of chromium content GB223.14-89 Methods for chemical analysis of steel and alloys Molybdenum reagent extraction spectrophotometric determination of vanadium content GB/T223.16-91
Methods for chemical analysis of steel and alloys Chromotropic acid spectrophotometric determination of titanium content GB223.17-89 Methods for chemical analysis of steel and alloys Diantipyryl methane spectrophotometric determination of titanium content GB /T223.18—944
Methods for chemical analysis of steel and alloys Sodium thiosulfate-iodine determination of copper GB223.19—89 Methods for chemical analysis of steel and alloys The new cuproline-chloroform extraction spectrophotometric determination of copper content GB/T223.23—94
Methods for chemical analysis of steel and alloys The diacetyl nickel direct spectrophotometric determination of nickel GB/T223.24—94
GB223.26—89
GB223.27— 84
GB223.39—85
GB223.40—85
Methods for chemical analysis of steel, iron and alloys The diacetyl-chloroform extraction spectrophotometric method for the determination of nickel content Chemical analysis of steel, iron and alloys The thiocyanate direct spectrophotometric method for the determination of molybdenum content Chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
GB223.49—85. Methods for chemical analysis of steel, iron and alloys GB 223.54-87
GB223.58—87
GB 223.59—87
GB 223.60—87
GB 223. 61-87
GB223.62—87
GB223.63—88
GB223.64—88
GB 223.67—89
GB223.68—89
GB223.69—89
Methods for chemical analysis of iron, steel and alloys
Thiocyanate-butyl acetate extraction photometric determination of molybdenum contentChlorosulfonphenol S photometric determination of saw content
Ion exchange separation-chlorosulfonphenol S photometric determination of saw contentExtraction separation-azochlorophosphine mA photometric determination of total rare earth contentFlame atomic absorption spectrophotometric determination of nickel contentMethods for chemical analysis of iron, steel and alloys
Sodium arsenite-sodium nitrite titration determination of manganese contentMethods for chemical analysis of iron, steel and alloys
Methods for chemical analysis of iron, steel and alloys
Methods for chemical analysis of iron, steel and alloys
Methods for chemical analysis of iron, steel and alloys
Methods for chemical analysis of iron, steel and alloys
Methods for chemical analysis of iron, steel and alloys||tt ||Methods for Chemical Analysis of Iron, Steel and Alloy
Methods for Chemical Analysis of Iron, Steel and Alloy
Antimony phosphomolybdate blue photometric method for determination of phosphorus
Perchloric acid dehydration gravimetric method for determination of silicon
Ammonium phosphomolybdate volumetric method for determination of phosphorus
Butyl butyl ester extraction photometric method for determination of phosphorus
Sodium (potassium) periodate photometric method for determination of manganese
Flame atomic absorption spectrometry for determination of manganese
Methods for Chemical Analysis of Iron, Steel and Alloy
Reduction distillation-methylene blue photometric method for determination of sulfurMethods for Chemical Analysis of Iron, Steel and Alloy
Combustion-potassium iodate volumetric method for determination of sulfur
Methods for Chemical Analysis of Iron, Steel and Alloy
Combustion gas volumetric method for determination of carbon
GB/T 223.71—91
Methods for chemical analysis of steel and alloy 2
Combustion gravimetric method for determination of carbon content
GB/T223.72—91
Methods for chemical analysis of steel and alloy
GB/T223.74—91
Methods for chemical analysis of steel and alloy
Alumina chromatography-sulfuric acid lock gravimetric method for determination of sulfur content Combustion gravimetric method or combustion gas volumetric method for determination of uncombined carbon content GB/T223.76—94
Methods for chemical analysis of steel and alloy Determination of vanadium content by flame atomic absorption spectrometry Metal tensile test method
G B228—87
GB229—94
GB232—88
Method for Charpy notched impact test of metal
Method for bending test of metal
GB247—88
GB709—88
GB3531-1996
General provisions for acceptance, packaging, marking and quality certificate of steel plates and strips Size, shape, weight and permissible deviation of hot-rolled steel plates and strips GB/T2970—91 Method for ultrasonic flaw detection of medium and thick steel plates GB2975-82
Sampling provisions for mechanical and process performance tests of steel materials1 When the impact energy of the Charpy (V-notch) low-temperature impact test is less than that specified in 4.4.2, a group of three specimens shall be taken from the same steel plate or the same sample for testing. The arithmetic mean of the six specimens in the two groups before and after shall not be less than the specified value, but two specimens are allowed to be less than the specified value, and only one specimen is allowed to be less than 70% of the specified value. 6.4.2 The retest of other items shall comply with the provisions of GB247. 7 Packaging, marking and quality certificate
The packaging, marking and quality certificate of steel plates shall comply with the relevant provisions of GB247. GB3531-1996
Appendix A
(Appendix to the standard)
Cited standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When the standard is published, the versions shown are valid. All standards will be revised. All parties using this standard should explore the possibility of using the latest versions of the following standards. GB222-84
Sampling method for chemical analysis of steel and allowable deviation of chemical composition of finished products GB223.3-88 Chemical analysis methods for steel and alloys Antipyryl methane phosphomolybdic acid gravimetric method for determination of phosphorus content GB223.4-88 Chemical analysis methods for steel and alloys Ammonium nitrate oxidation volumetric method for determination of manganese content GB223.9-89 Chemical analysis methods for steel and alloys Chrome azure S photometric method for determination of aluminum content GB/T223.10-91 Chemical analysis methods for steel and alloys Copper iron reagent separation Ion-chrome azurol S spectrophotometric determination of aluminum content GB/T223.11-91
Methods for chemical analysis of steel and alloys Ammonium persulfate oxidation volumetric determination of chromium content GB223.14-89 Methods for chemical analysis of steel and alloys Molybdenum reagent extraction spectrophotometric determination of vanadium content GB/T223.16-91
Methods for chemical analysis of steel and alloys Chromotropic acid spectrophotometric determination of titanium content GB223.17-89 Methods for chemical analysis of steel and alloys Diantipyryl methane spectrophotometric determination of titanium content GB /T223.18—944
Methods for chemical analysis of steel and alloys Sodium thiosulfate-iodine determination of copper GB223.19—89 Methods for chemical analysis of steel and alloys The new cuproline-chloroform extraction spectrophotometric determination of copper content GB/T223.23—94
Methods for chemical analysis of steel and alloys The diacetyl nickel direct spectrophotometric determination of nickel GB/T223.24—94
GB223.26—89
GB223.27— 84
GB223.39—85
GB223.40—85
Methods for chemical analysis of steel, iron and alloys The diacetyl-chloroform extraction spectrophotometric method for the determination of nickel content Chemical analysis of steel, iron and alloys The thiocyanate direct spectrophotometric method for the determination of molybdenum content Chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
Methods for chemical analysis of steel, iron and alloys
GB223.49—85. Methods for chemical analysis of steel, iron and alloys GB 223.54-87
GB223.58—87
GB 223.59—87
GB 223.60—87
GB 223. 61-87
GB223.62—87
GB223.63—88
GB223.64—88
GB 223.67—89
GB223.68—89
GB223.69—89
Methods for chemical analysis of iron, steel and alloys
Thiocyanate-butyl acetate extraction photometric determination of molybdenum contentChlorosulfonphenol S photometric determination of saw content
Ion exchange separation-chlorosulfonphenol S photometric determination of saw contentExtraction separation-azochlorophosphine mA photometric determination of total rare earth contentFlame atomic absorption spectrophotometric determination of nickel contentMethods for chemical analysis of iron, steel and alloys
Sodium arsenite-sodium nitrite titration determination of manganese contentMethods for chemical analysis of iron, steel and alloys
Methods for chemical analysis of iron, steel and alloys
Methods for chemical analysis of iron, steel and alloys
Methods for chemical analysis of iron, steel and alloys
Methods for chemical analysis of iron, steel and alloys
Methods for chemical analysis of iron, steel and alloys||tt ||Methods for Chemical Analysis of Iron, Steel and Alloy
Methods for Chemical Analysis of Iron, Steel and Alloy
Antimony phosphomolybdate blue photometric method for determination of phosphorus
Perchloric acid dehydration gravimetric method for determination of silicon
Ammonium phosphomolybdate volumetric method for determination of phosphorus
Butyl butyl ester extraction photometric method for determination of phosphorus
Sodium (potassium) periodate photometric method for determination of manganese
Flame atomic absorption spectrometry for determination of manganese
Methods for Chemical Analysis of Iron, Steel and Alloy
Reduction distillation-methylene blue photometric method for determination of sulfurMethods for Chemical Analysis of Iron, Steel and Alloy
Combustion-potassium iodate volumetric method for determination of sulfur
Methods for Chemical Analysis of Iron, Steel and Alloy
Combustion gas volumetric method for determination of carbon
GB/T 223.71—91
Methods for chemical analysis of steel and alloy 2
Combustion gravimetric method for determination of carbon content
GB/T223.72—91
Methods for chemical analysis of steel and alloy
GB/T223.74—91
Methods for chemical analysis of steel and alloy
Alumina chromatography-sulfuric acid lock gravimetric method for determination of sulfur content Combustion gravimetric method or combustion gas volumetric method for determination of uncombined carbon content GB/T223.76—94
Methods for chemical analysis of steel and alloy Determination of vanadium content by flame atomic absorption spectrometry Metal tensile test method
G B228—87
GB229—94
GB232—88
Method for Charpy notched impact test of metal
Method for bending test of metal
GB247—88
GB709—88
GB3531-1996
General provisions for acceptance, packaging, marking and quality certificate of steel plates and strips Size, shape, weight and permissible deviation of hot-rolled steel plates and strips GB/T2970—91 Method for ultrasonic flaw detection of medium and thick steel plates GB2975-82
Sampling provisions for mechanical and process performance tests of steel materials40—85
Methods for chemical analysis of steel and alloys Determination of nickel by diacetyl-chloroform extraction photometry Methods for chemical analysis of nickel, steel and alloys Direct photometric method for determination of molybdenum content by thiocyanate|| tt||Methods of chemical analysis of steel and alloys
Methods of chemical analysis of steel and alloys
GB223.49-85. Methods of chemical analysis of steel and alloys GB 223.54-87
GB223.58— 87
GB 223.59—87
GB 223.60—87
GB 223. 61-87
GB223.62—87
GB223.63—88
GB223.64—88
GB 223.67—89
GB223.68—89
GB223.69—89
Methods for chemical analysis of steel and alloys
Thiocyanate-butyl acetate extraction photometric method to determine the amount of molybdenum chlorosulfonol S photometric method to determine the saw amount
Ion exchange separation-chlorosulfenol S photometric method to determine the saw amount extraction separation-even Nitrogen mA photometric method to determine the total rare earth content Flame atomic absorption spectrophotometry to determine the nickel content Chemical analysis method for steel and alloys
Sodium arsenite-sodium nitrite titration method to determine the manganese content Chemical analysis method for steel and alloys| |tt||Chemical Analysis Methods for Steel and Alloys
Chemical Analysis Methods for Steel and Alloys
Chemical Analysis Methods for Steel and Alloys
Chemical Analysis Methods for Steel and Alloys
Steel and Alloy chemical analysis method
Determination of phosphorus content by antimony phosphomolybdenum blue photometry
Determination of silicon content by perchloric acid dehydration gravimetric method
Determination of phosphorus content by ammonium phosphomolybdate volumetric method||tt| |Determination of phosphorus content by photometric method of butyl acetate extraction
Determination of manganese content by sodium periodate (bell) photometry
Determination of manganese content by flame atomic absorption spectrometry
Steel and Alloy Chemistry Analytical methods
Reductive distillation-Methyl blue photometric method for determination of sulfur content in steel and alloys Chemical analysis methods
Combustion-Potassium iodate volumetric method for determination of sulfur content
Chemical analysis of steel and alloys Methods
Determination of carbon content by combustion gas volumetric method
GB/T 223.71—91
Chemical analysis method for steel and alloys 2
Determination of carbon content by combustion gravimetric method||tt ||GB/T223.72—91
Methods of chemical analysis of steel and alloys
GB/T223.74—91
Methods of chemical analysis of steel and alloys
Alumina Chromatography - Determination of sulfur content by sulfuric acid lock gravimetric method Determination of uncombined carbon content by combustion gravimetric method or combustion gas volume method GB/T223.76-94
Chemical analysis methods for steel and alloys Determination of vanadium content by flame atomic absorption spectrometry Metal Tensile Test Method
GB228—87
GB229—94
GB232—88
Metal Charpy Notch Impact Test Method
Metal Bending Test Method
GB247-88
GB709-88
GB3531-1996
General provisions for acceptance, packaging, marking and quality certificates of steel plates and strips Hot-rolled steel plates and steel Belt size, shape, weight and allowable deviation GB/T2970-91 Ultrasonic flaw detection method for medium-thick steel plates GB2975-82
Sampling regulations for steel mechanical and process performance testing40—85
Methods for chemical analysis of steel and alloys Determination of nickel by diacetyl-chloroform extraction photometry Methods for chemical analysis of nickel, steel and alloys Direct photometric method for determination of molybdenum content by thiocyanate|| tt||Methods of chemical analysis of steel and alloys
Methods of chemical analysis of steel and alloys
GB223.49-85. Methods of chemical analysis of steel and alloys GB 223.54-87
GB223.58— 87
GB 223.59—87
GB 223.60—87
GB 223. 61-87
GB223.62—87
GB223.63—88
GB223.64—88
GB 223.67—89
GB223.68—89
GB223.69—89
Methods for chemical analysis of steel and alloys
Thiocyanate-butyl acetate extraction photometric method to determine the amount of molybdenum chlorosulfonol S photometric method to determine the saw amount
Ion exchange separation-chlorosulfenol S photometric method to determine the saw amount extraction separation-even Nitrogen mA photometric method to determine the total rare earth content Flame atomic absorption spectrophotometry to determine the nickel content Chemical analysis method for steel and alloys
Sodium arsenite-sodium nitrite titration method to determine the manganese content Chemical analysis method for steel and alloys| |tt||Chemical Analysis Methods for Steel and Alloys
Chemical Analysis Methods for Steel and Alloys
Chemical Analysis Methods for Steel and Alloys
Chemical Analysis Methods for Steel and Alloys
Steel and Alloy chemical analysis method
Determination of phosphorus content by antimony phosphomolybdenum blue photometry
Determination of silicon content by perchloric acid dehydration gravimetric method
Determination of phosphorus content by ammonium phosphomolybdate volumetric method||tt| |Determination of phosphorus content by photometric method of butyl acetate extraction
Determination of manganese content by sodium periodate (bell) photometry
Determination of manganese content by flame atomic absorption spectrometry
Steel and Alloy Chemistry Analytical methods
Reductive distillation-Methyl blue photometric method for determination of sulfur content in steel and alloys Chemical analysis methods
Combustion-Potassium iodate volumetric method for determination of sulfur content
Chemical analysis of steel and alloys Methods
Determination of carbon content by combustion gas volumetric method
GB/T 223.71—91
Chemical analysis method for steel and alloys 2
Determination of carbon content by combustion gravimetric method||tt ||GB/T223.72—91
Methods of chemical analysis of steel and alloys
GB/T223.74—91
Methods of chemical analysis of steel and alloys
Alumina Chromatography - Determination of sulfur content by sulfuric acid lock gravimetric method Determination of uncombined carbon content by combustion gravimetric method or combustion gas volume method GB/T223.76-94
Chemical analysis methods for steel and alloys Determination of vanadium content by flame atomic absorption spectrometry Metal Tensile Test Method
GB228—87
GB229—94
GB232—88
Metal Charpy Notch Impact Test Method
Metal Bending Test Method
GB247-88
GB709-88
GB3531-1996
General provisions for acceptance, packaging, marking and quality certificates of steel plates and strips Hot-rolled steel plates and steel Belt size, shape, weight and allowable deviation GB/T2970-91 Ultrasonic flaw detection method for medium-thick steel plates GB2975-82
Sampling regulations for steel mechanical and process performance testing
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