Some standard content:
ICS 77. 140. 50
National Standard of the People's Republic of China
GB/T 5213- 2001
Cold rolled steel sheets and strips for deep drawing
Cold rolled sheets and strips for deep drawing2001-12-17Promulgated
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Implemented on 2002-05-01
National Standard of the People's Republic of China
Cold rolled steel sheets and strips for deep drawing
G1/T 5213--2001
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GR/T 5213—2001
This standard is not equivalent to D1EN101301
1991 & Cold Forming Low Carbon Steel Cold Rolled Steel Plate" and combined with the specific conditions of my country to GB/T 5213-1985 Cold-rolled Steel Sheets and Strips for Deep Drawing" has been revised. The following provisions have been modified in this revision: the original grade 08A1 has been closed as SC1, and two ultra-deep drawing steel grades SC2 and SC3 have been added. The product thickness range has been expanded from c.5rm~3.0mum to 0.3mn~3.5mm, and the chemical classification and code have been added, such as adjusting the silicon and sulfur content according to the surface structure, dimensional accuracy, and unevenness.
Mechanical properties and L process properties, use fixed-distance specimens, specify n and r values, and can choose to use n and \ values instead of cups. The product's anti-rust and oiling are more specifically specified. This standard From the date of implementation, the standard replaces GB/152131985 Cold-rolled thin steel sheets and strips for deep drawing. Appendix A of this standard is the appendix of the standard.
This standard was proposed by the State Bureau of Metallurgical Industry. This standard was established by the National Technical Committee for Steel Standardization. The originators of this standard: Baosteel Co., Ltd., Anshan Iron and Steel Group Metallurgical Industry Information Standards Research Institute, the originators of this standard: Li Yuguang, Liu Shan, Huang Ying, Fan Zhifeng, this standard was first issued in July 1985,
1 Scope
National Standard of the People's Republic of China
Cold-rolled thin steel sheets and strips for deep drawing
Cold Rolled sheets and strips for deep drawingGR/T5213-2001
代都G1/T 5213 --1983
This standard specifies the size, shape, weight, technical requirements, test force method, inspection rules, packaging, marking and quality certificate of cold-rolled low-carbon thin steel sheets and strips for deep drawing (hereinafter referred to as steel sheets and strips). This standard is applicable to high-quality cold-rolled low-carbon and non-intermittently excited atomic steel sheets and strips for deep drawing and long deformation complex parts in the automobile industry. 2 Referenced standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this 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. Sampling method for chemical analysis of steel and allowable deviation of chemical composition of finished products GB/T 222-1984
GB/T 223.3—1088
GB/T 223.5-007
Methods for chemical analysis of iron, steel and alloys
Determination of phosphorus content by antipyrine methane phosphate gravimetric method Chemical analysis methods for iron, steel and alloys: Determination of iron content by reduced salt photometric method Acid-soluble chromium content by separation by reagent spectrophotometric method Determination of aluminum content by sodium carbonate separation Chemical analysis methods for iron, steel and alloys
GB/T 223.10 2000
Determination of copper content by flame atomic absorption spectrophotometric method Chemical analysis methods for iron, steel and alloys
GB/T 223.12 1991
Determination of copper content by flame atomic absorption spectrophotometric method "Methods for chemical analysis of iron, steel and alloys
G13/T 223.53 --1987
G3/T 223. 54—1987
Methods for chemical analysis of steel and alloy-Determination of nickel by flame atomic absorption spectrophotometry G3/T 223.62—1988 Methods for chemical analysis of steel and alloy-Determination of phosphorus by ethyl acetate extraction spectrophotometry G3/T 223. 63
8-1968
G3/1 223, 67
G/T 223. 72
G/T 223. 74
GB/T 228-1$87
GB/T 232:-1999
GB/T 247
G/T 708
G3/T 2975
GB/T 4156
Methods for chemical analysis of iron, steel and alloy
Methods for chemical analysis of iron, steel and alloy
Methods for chemical analysis of iron, steel and alloy
Spectrophotometric determination of manganese content with sodium (potassium) periodide reduction spectrophotometric determination of sulfur content with methylene blue Alumina chromatography separation with chlorinated iodine spectrophotometry Determination of sulfur content in slag Determination of uncombined carbon content
Methods for chemical analysis of iron, steel and alloy
Methods for tensile testing of metals
Methods for bending test of metallic materials
General provisions for inspection, assembly, marking and quality certification of steel sheets and strips Dimensions, shape, weight and permissible deviations of cold-rolled steel sheets and strips 1958
GB/T 4335
GB/T 4336-1984
GB/T 5027--1999
GR/T 3C28
t:3/T 6397- 1999
GB/T 8170—1987
Mechanical property test of steel and steel products Sampling location and specimen preparation Test method for metal cupping (thickness 0.2~2mm) Determination of ferrite grain size of cold-rolled low-alkali steel sheets Photoelectric emission spectroscopic analysis of carbon steel and medium and low alloy steels Test method for plastic strain ratio (\ value) of metal sheets and strips Test method for tensile strain index (n value) of metal sheets and strips Metal tensile test specimens
Numerical rounding guidelines
Approved by the General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China on 2001:12-17 Implementation on 2002-0501
GB/T 8705.1—1988
GB/T5213—2001
Chemical analysis method of ferrophosphorus-Determination of carbon content by infrared absorption methodGB/T 13298--1991
Methods for examination of metal microstructure
GB/T13299—1991
Evaluation method for microstructure of steel
GB/T17605--1998General technical requirements for delivery of steel and steel products 3. Designation method, classification and code
3.1 Designation
3.1.1 The designations of steel plates and strips are represented by the Chinese phonetic letter SC for “deep drawing” and 1, 2, 3 for “stamping grade sequence number”. The designations are SC1, SC2, SC3.
3.1.2SC is the grade of steel sheets and strips for deep drawing, and SC2.SC3 is the grade of steel sheets and strips for ultra-deep drawing. 3.2 Classification and code
3.2.1 For brand SC1, the drawing level is classified according to the purpose, as shown in Table 1: Table 1 Drawing level classification (SC1)
Used for the most complex parts in punching and drawing
Used for very complex parts in punching and drawing
Used for complex parts in punching and drawing
3.2.2 According to the edge state, it is divided into: Type:
No edge cutting
3.2.3 According to dimensional accuracy, it is divided into two levels:
Ordinary thickness accuracy
Advanced thickness accuracy
3.2.4 According to the degree, it is divided into two levels
Ordinary accuracy
Advanced accuracy
3.2.5 According to the surface structure, it is divided into two types:
D:Its characteristic is that the roller is processed by a roller grinder and then shot peened. Polished surface B: Its characteristic is that the roller is processed by a roller grinder. 3.2.6 According to the surface quality, it is divided into one level:
Higher-level finishing surface
Higher-level finishing surface
4 Dimensions, shape, weight and allowable deviation
4.1 Inch and allowable deviation
Drawing grade code
4.1.1 The size range of steel plates and steel strips shall comply with the provisions of Table 2 and GB/T708. Other specifications of steel plates or strips can be supplied upon negotiation between the supplier and the buyer.
Table 2 Thickness and width range
Nominal thickness
220, 30~3. 5
0. 70-- 0. 79
C. 80 ~ 0. 91
G.92--1.50
Nominal width
700--1500
700-1 G20
7001 600
GB/T 5213—2001
4.1.2 The inner diameter of the steel strip supplied in coils shall be indicated in the contract. 4.1.3 The allowable deviation of the thickness of steel plates and strips is 4.1.3. 1 The allowable deviation of the original length of steel plates and steel strips shall comply with the provisions of Table 3. The thickness measurement position is any point which is not less than 25 mm (scratched edge) and 40 mm (uncut edge) from the edge. Table 3 Thickness allowable deviation
Thickness allowable deviation
Nominal temperature
0.5C -~ 0.40
≥0.40~C.60
>0.60 ~-6.80
2(.80--1.00)
≥1.01--1.26:
21.20 ~-1.56
2-1.65~-2.00
*2.01-~ 2.50
>2.50-~ 3.00
-3.00-~ 3. 50
Ordinary precision PT.A
Nominal thickness
=1 200~-1 590
Advanced precision PT.C
Nominal width
21 2:0~-1 56:0
21 590
4.1.3.2 For the delivered steel strip, the thickness deviation within the total length of 3011 is allowed to be 50% of the value specified in Table 3, and the thickness deviation within the weld zone of 15m is allowed to be 60 steps of the value specified in Table 3. 4.7.4 The width tolerance of steel plate and steel strip is: +4mm
Cutting edge: Nominal width ≤1200mm
Nominal width>1200 mitr
Uncut edge:
4.1.5 Allowable deviation of the length of the steel plate:
Nominal length ≤ 200 mm
Nominal length 200 mm
4.2 Appearance
4. 2. 1 Squareness
The squareness of the steel plate shall not exceed 1% of the actual width of the steel plate. The squareness is the vertical projection length of the wide side of the steel plate in the rolling direction, or half of the difference between the diagonal lines of the steel plate. 4.2.2 Sickle
The scissor bend of the trimmed steel plate and steel strip shall not exceed 6 mm in a length of 2000 mm: When the length of the steel plate is not more than 200 mm, the scissor bend shall not exceed 0.3 of the actual length of the steel plate. 4. 2. 3 Unevenness
The unevenness of the steel plate per meter shall comply with the provisions of Table 4. The unevenness of the steel plate is the maximum distance between the lower surface of the steel plate and the platform when the steel plate is placed on the platform.
Nominal quality
1 200~-1 500
GB/T5213—2001
Table unevenness
Unevenness, not more than
Ordinary precision FF.A
Nominal thickness
0. 70-~-1. 20
Grade precision PF.C
0. 70-- <1. 20
Steel plates are delivered by actual weight or theoretical weight. Theoretical weight calculation method is shown in Appendix A (standard appendix). Steel strips are delivered by actual weight.
Ordering Information
5.1 The order contract or order should include the following contents:a) Product name (steel plate or steel strip);
b) Product label number:
) Brand:
d) Weight;
e) Edge state (EC or EM);
|) Surface structure (B or ID);
g) Surface quality code (FB or FC);
h) Drawing level (F, HF or ZF for SC1);
i) Specification and thickness accuracy (PT.A or PT.C);
i) Packaging requirements.
5.2 If the size and roughness accuracy, surface quality code, drawing grade (only for SC1), surface structure type, edge state and packaging information are not specified when ordering, the products of this standard shall be supplied with ordinary size and roughness accuracy FB grade surface quality, drawing grade (only for SI) F, surface structure NF, uncut steel strip and cut steel plate, and shall be packaged according to the packaging method provided by the supplier. 5.3 Marking example: Standard GB/T5213, brand SC1, trimmed steel plate with dimensions of 1.00mm×1500mm×2000mm, dimensional accuracy PT, grade A, roughness PF-C., surface quality F13, drawing grade ZF, marked as: SC1-1.0X1500X2000-PTA-PF-C-FB-ZF-GB/T 5213—20016 Technical requirements
6.1 Chemical composition
6.1.1 The chemical composition (melting analysis) of steel shall conform to the provisions of Table 5. Table 5 Chemical composition (melting analysis)
.0.025
.0.020
(mass fraction)
Als (acid soluble aluminum)
0. 02--0. 07
Note: According to the belt, grade SC1 can be appropriately added with alloy elements such as Ti and Nb, and no requirement is made for Als at this time: grades SC2 and SC3 can appropriately add alloy elements such as V.
GB/T 5213-2001
6.1.2 Residual element content in steel: w(Cr) 0.08%, z(Ni) ≤ 0.1c%, (Cu) ≤ 0.15 ※, if the supplier can guarantee, no analysis is required. When the mass fraction of copper in the steel is greater than 0.15, it shall be handled by negotiation between the supply and demand parties. 6.1.3 The allowable deviation of chemical composition of steel plates and steel strips shall comply with the provisions of Table 6 in GB/T222-1984. 6.2 Delivery status
6-2.1 Steel plates and steel strips shall be delivered after heat treatment (annealing) and leveling. 6.2.2 Steel plates and steel strips shall generally be oiled, and the oil film shall be removable with alkaline solution or other commonly used degreasing agents. The supplier shall ensure that the oiled products will not rust for 6 months from the date of leaving the factory under normal loading, transportation, handling and storage conditions. The products may also be supplied without oiling after agreement between the supplier and the buyer and specified in the contract. 6.3 Mechanical properties
6.3.1 The yield point, tensile strength and elongation of steel plates and steel strips shall comply with the provisions of Table 6. The values of l and r of grades SC2 and SC3 shall comply with the provisions of Table 6. : After consultation between the supply and demand parties and indication in the contract, brand SC1 can also be tested for n and r values. The values can be referred to the provisions of Table 6.
Table 6 Mechanical properties
Nominal thickness 1/mm
-C, 50-~$0. 70
0. 79~-1.50
0. 73 -~ 1. 50
The hysteresis point is a, or Mpi.2
2Tensile test takes transverse specimens,
Bending point/MPa
3 is, is the sample width, and is the specimen gauge length.
Tensile strength d/MPa
270--350
270--330
273~350
Elongation after fracture 8/
(o.-20 mm.t,=80 mm);(bh.=20 mt,-8mm)34
4The value meter is suitable for the case of thickness 0.5mm: when the degree>2mx, the r value is reduced by 0.2.5-(m+2ns-nm)/4,r=(ro2r45 [r.)/4,3.18
6.3.2SC1 steel plates and steel strips should ensure that no slip line is generated during stamping within 6 months after leaving the factory. SC2 and SC3 are semi-aging steels6. 4Technical properties of grade SC1
6.4.7 Bending performance
Steel plates and strips with a thickness of more than 2 mm should be subjected to 18) bending test in cold state; the bending core diameter = 0, and there should be no cracks, cracks and delamination at the bending part.
6.4.2 Cup width test
SC1 steel plates and strips with a thickness not exceeding 2 III are subjected to cupping test in the as-delivered state, and the cupping value (punching depth) shall comply with the provisions of Table 7. After negotiation and indication in the contract, the " value can be used instead of the cupping value. Table 7 Cupping value
Nominal thickness
Stamping depth not less than
Nominal thickness
GB/T 5213—2001
Table 7 (End)
Stamping depth not less than
Note: The thickness is selected as the middle thickness in the table within the range of 0.5 mm~2.0) u. The cupping value is obtained by interpolation according to the tabular value, rounded to 1 decimal place. 6.5 Metallographic structure of steel plate and strip
6.5.1 Grain size: The grain size of steel plate and strip shall be tested according to GB/T4335, and the grain size shall be not less than grade 6 or delivered in the form of pancake-shaped grains. Mixed grains within two adjacent grades are allowed. 6.5.2 Free cementite: The free carburized body of steel plate and strip shall be tested according to (FH/T13299, and shall not be greater than grade 2. 6.5.3 The supply shall ensure the grain size The grain size and free cementite meet the requirements in 1. After the agreement between the supplier and the buyer, and after it is stated in the contract, the grain size and free cementite age test results can be provided.
6.6 Surface quality
6.6.1 The surface of the steel plate and steel strip shall not have cracks, scars, fire impurities and other defects that are harmful to use: the steel plate and steel strip shall not have delamination. 6.6.2 The surface quality of the steel plate and steel strip is divided into two levels, and its characteristics are listed in Table 8. Table 8 Surface quality | |tt||Surface quality represents 5
Higher-level finishing surface
Higher-level finishing surface
It is allowed to have defects that do not affect the formability and adhesion of coating and plating, such as small spots, small scratches, small marks, slight scratches and slight oxidation color. The better side of the product must have the appearance quality after painting or the appearance quality after electroplating. The other side should at least meet the requirements of FB grade table 6.6.3 In the process of continuous production of steel strips, local surface defects are not easy to find and remove, so it is allowed to deliver with defects, but some defective parts shall not exceed 8% of the total length of each roll of steel strip. Test method
7.1 The appearance of steel plates and steel strips shall be inspected by daylight. 7.2 The size and shape of steel plates and steel strips shall be measured with appropriate measuring instruments and tools. 7.3 The inspection items, sampling quantity, sampling method, and test method of each batch of steel products shall comply with Table 9 6
Test items
Chemical analysis
Particle size
Free net carbon
GB/T 5213--2001
9Test items, sampling quantity, sampling method and test methodSampling quantity (per furnace number)
SC1.SC2:1
Sampling method
GR/T 222
GB/T 2975
GB/T 2975, GB/T 6397
Sample width 90mm
GB/T 2973
b20mm.L==150 mm
GB/T4335
GB/113298
1 SC1, SC2 and SC3 The test items samples required for each brand shall comply with the relevant provisions of this standard. 2 is the width of the specimen, is the length of the specimen
3SC1. Take a specimen at 90°: SC2, SC3, take 045, 1 specimen at 90°8
Inspection rules
Test method
GB/T 323 Related standards
GR/T4336
GR/T 8705.1
GB/T228
CB/T 5927,GR/T 5028
GB/T4130
GB/T 232
GB/T 4335
GB/T 13259
8.1 Steel plates and steel strips shall be inspected and accepted in batches. Each batch shall consist of steel plates or steel strips of the same furnace number, grade, thickness and heat treatment system, not exceeding 30 tons. For steel strips with a roll weight of less than 3 tons, each roll shall be regarded as an inspection batch. 8.2 Re-inspection
The re-inspection of steel plates and steel strips shall comply with the provisions of GB/T217 or GB/T17505. 9 Packaging, marking and quality certificate
9.1 The packaging, marking and quality certificate of steel plates and steel strips shall comply with the provisions of GB/T247. 9.2 In addition to the various specifications specified in GR/T247, the label and quality certificate shall also indicate: surface classification, drawing grade and weight of steel plate and steel strip.
GB/T 5213-2001
Appendix A
(Appendix to the standard)
Weight calculation method for theoretical weight
When the steel plate is theoretically weighed, the nominal size is used. A2 The weight calculation method for theoretical weight shall be in accordance with the provisions of Table A1. Table A1
Calculation sequence
Basic weight (kg-mm)
Unit weight/(kg-m )
Area of steel plate/m
Weight of 1 piece/kg
Weight of 1 bundle/kg
Total weight/kg
Calculation method
7.85 (thickness 1mm. Weight of 1m) Basic weight (kg-)(thickness change m)
Width (m)×length (m)
Unit weight/(kgm^)×area (m\) Weight of 1 piece (kg)×number of pieces in 1 bundle Add the weights of each bundle
Method: Total weight can also be obtained by weight of 1 piece (kg)×total number of pieces in 1 bundle43Numerical rounding method According to the provisions of GB/18170. GB/T 5213-2001
Number of digits of the result
Round to effective number4
Round to 1 significant figure
Round to 3 significant figures
Round to the appropriate number of kg
Integer of g
Copyright reserved
Infringements must be investigated
Book number: 135065: 118306
Recharge price:
10.00 yuan3 In the process of continuous production of steel strip, local surface defects are not easy to find and remove, so it is allowed to deliver with defects, but some defective parts shall not exceed 8 of the total length of each roll of steel strip. Test method
7.1 The appearance of steel plates and steel strips shall be inspected by daylight. 7.2 The size and shape of steel plates and steel strips shall be measured with appropriate visual gauges and tools. 7.3 The inspection items, sampling quantity, sampling method and test method of each batch of steel shall comply with the provisions of Table 9.6 Inspection items Chemical analysis Grain size Free net carbon GB/T 5213--2001 Inspection items, sampling quantity, sampling method and test method Sampling number (per batch) SC1.SC2:1 Sampling method GR/T 222 GB/T 2975 GB/T 2975, GB/T 6397 Specimen width 90 mm GB/T 2973 b 20 mm.L==150 mm
GB/T4335
GB/113298
1 SC1, SC2 and SC3 The test items samples required for each brand shall comply with the relevant provisions of this standard. 2 is the width of the specimen, is the length of the specimen
3SC1. Take a specimen at 90°: SC2, SC3, take 045, 1 specimen at 90°8
Inspection rules
Test method
GB/T 323 Related standards
GR/T4336
GR/T 8705.1
GB/T228
CB/T 5927,GR/T 5028
GB/T4130
GB/T 232
GB/T 4335
GB/T 13259
8.1 Steel plates and steel strips shall be inspected and accepted in batches. Each batch shall consist of steel plates or steel strips of the same furnace number, grade, thickness and heat treatment system, not exceeding 30 tons. For steel strips with a roll weight of less than 3 tons, each roll shall be regarded as an inspection batch. 8.2 Re-inspection
The re-inspection of steel plates and steel strips shall comply with the provisions of GB/T217 or GB/T17505. 9 Packaging, marking and quality certificate
9.1 The packaging, marking and quality certificate of steel plates and steel strips shall comply with the provisions of GB/T247. 9.2 In addition to the various specifications specified in GR/T247, the label and quality certificate shall also indicate: surface classification, drawing grade and weight of steel plate and steel strip.
GB/T 5213-2001
Appendix A
(Appendix to the standard)
Weight calculation method for theoretical weight
When the steel plate is theoretically weighed, the nominal size is used. A2 The weight calculation method for theoretical weight shall be in accordance with the provisions of Table A1. Table A1
Calculation sequence
Basic weight (kg-mm)
Unit weight/(kg-m )
Area of steel plate/m
Weight of 1 piece/kg
Weight of 1 bundle/kg
Total weight/kg
Calculation method
7.85 (thickness 1mm. Weight of 1m) Basic weight (kg-)(thickness change m)
Width (m)×length (m)
Unit weight/(kgm^)×area (m\) Weight of 1 piece (kg)×number of pieces in 1 bundle Add the weights of each bundle
Method: Total weight can also be obtained by weight of 1 piece (kg)×total number of pieces in 1 bundle43Numerical rounding method According to the provisions of GB/18170. GB/T 5213-2001bZxz.net
Number of digits of the result
Round to effective number4
Round to 1 significant figure
Round to 3 significant figures
Round to the appropriate number of kg
Integer of g
Copyright reserved
Infringements must be investigated
Book number: 135065: 118306
Recharge price:
10.00 yuan3 In the process of continuous production of steel strip, local surface defects are not easy to find and remove, so it is allowed to deliver with defects, but some defective parts shall not exceed 8 of the total length of each roll of steel strip. Test method
7.1 The appearance of steel plates and steel strips shall be inspected by daylight. 7.2 The size and shape of steel plates and steel strips shall be measured with appropriate visual gauges and tools. 7.3 The inspection items, sampling quantity, sampling method and test method of each batch of steel shall comply with the provisions of Table 9.6 Inspection items Chemical analysis Grain size Free net carbon GB/T 5213--2001 Inspection items, sampling quantity, sampling method and test method Sampling number (per batch) SC1.SC2:1 Sampling method GR/T 222 GB/T 2975 GB/T 2975, GB/T 6397 Specimen width 90 mm GB/T 2973 b 20 mm.L==150 mm
GB/T4335
GB/113298
1 SC1, SC2 and SC3 The test items samples required for each brand shall comply with the relevant provisions of this standard. 2 is the width of the specimen, is the length of the specimen
3SC1. Take a specimen at 90°: SC2, SC3, take 045, 1 specimen at 90°8
Inspection rules
Test method
GB/T 323 Related standards
GR/T4336
GR/T 8705.1
GB/T228
CB/T 5927,GR/T 5028
GB/T4130
GB/T 232
GB/T 4335
GB/T 13259
8.1 Steel plates and steel strips shall be inspected and accepted in batches. Each batch shall consist of steel plates or steel strips of the same furnace number, grade, thickness and heat treatment system, not exceeding 30 tons. For steel strips with a roll weight of less than 3 tons, each roll shall be regarded as an inspection batch. 8.2 Re-inspection
The re-inspection of steel plates and steel strips shall comply with the provisions of GB/T217 or GB/T17505. 9 Packaging, marking and quality certificate
9.1 The packaging, marking and quality certificate of steel plates and steel strips shall comply with the provisions of GB/T247. 9.2 In addition to the various specifications specified in GR/T247, the label and quality certificate shall also indicate: surface classification, drawing grade and weight of steel plate and steel strip.
GB/T 5213-2001
Appendix A
(Appendix to the standard)
Weight calculation method for theoretical weight
When the steel plate is theoretically weighed, the nominal size is used. A2 The weight calculation method for theoretical weight shall be in accordance with the provisions of Table A1. Table A1
Calculation sequence
Basic weight (kg-mm)
Unit weight/(kg-m )
Area of steel plate/m
Weight of 1 piece/kg
Weight of 1 bundle/kg
Total weight/kg
Calculation method
7.85 (thickness 1mm. Weight of 1m) Basic weight (kg-)(thickness change m)
Width (m)×length (m)
Unit weight/(kgm^)×area (m\) Weight of 1 piece (kg)×number of pieces in 1 bundle Add the weights of each bundle
Method: Total weight can also be obtained by weight of 1 piece (kg)×total number of pieces in 1 bundle43Numerical rounding method According to the provisions of GB/18170. GB/T 5213-2001
Number of digits of the result
Round to effective number4
Round to 1 significant figure
Round to 3 significant figures
Round to the appropriate number of kg
Integer of g
Copyright reserved
Infringements must be investigated
Book number: 135065: 118306
Recharge price:
10.00 yuan
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