Codeofchina.com is in charge of this English translation. In case of any doubt about the contents of English translation, the Chinese original shall be considered authoritative.
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by China Iron and Steel Association.
This standard was prepared by SAC/TC 183 (National Technical Committee 183 on Iron and Steel of Standardization Administration of China).
Hot Rolling Checker Steel Sheet and Strip
1 Scope
This standard specifies the classification, codes, ordering information, dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and product quality certificate of hot rolling vhecker steel sheet and strip.
This standard is applicable to the rhombic, lenticular, round bean-shaped and combined hot rolling checker steel sheet and strip in thickness of 1.4mm to 16.0mm (hereinafter referred to as "steel sheet and strip").
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products
GB/T 228.1 Metallic Materials — Tensile Testing — Part 1: Method of Test at Room Temperature
GB/T 232 Metallic Materials — Bend Test
GB/T 247 General Rule of Package, Mark and Certification for Steel Plates (Sheets) and Strips
GB/T 700 Carbon Structural Steels
GB/T 709 Dimension, Shape, Weight and Tolerances for Hot-rolled Steel Plates and Sheets
GB/T 712 Ship and Ocean Engineering Structural Steel
GB/T 1591 High Strength Low Alloy Structural Steels
GB/T 2975 Steel and Steel Products — Location and Preparation of Test Pieces for Mechanical Testing
GB/T 4171 Atmospheric Corrosion Resisting Structural Steel
GB/T 8170 Rules of Rounding Off for Numerical Values & Expression and Judgment of Limiting Values
GB/T 17505 Steel and Steel Products — General Technical Delivery Requirements
GB/T 20066 Steel and Iron — Sampling and Preparation of Samples for the Determination of Chemical Composition
3 Classification and Code
3.1 Classification according to edge state are as follows:
a) Trimmed: EC;
b) Untrimmed: EM.
3.2 Classification according to checker shape are as follows:
a) Rhombic: LX;
b) Lenticular: BD;
c) Round bean-shaped: YD;
d) Combined: ZH.
4 Ordering Information
4.1 The order contract or order according to this standard shall include the following information:
a) Serial number of this standard;
b) Designation;
c) Product category (steel sheet or strip);
d) Specification;
e) Checker shape;
f) Edge state;
g) Other requirements.
4.2 Example of labelling
Untrimmed lenticular checker steel sheet delivered in accordance with this standard, in designation of Q235B, dimensions of 3.0 mm×1 250 mm×2 500 mm, labelled as:
Lenticular (BD) checker steel sheet Q235B-3.0×1 250 (EM) × 2 500—GB/T 33974-2017
5 Dimension, Shape and Weight
5.1 The dimension of steel sheetw and stripw as specified in Table 1. Other dimensions of steel sheet and strips may also be provided, through negotiation betwwen the supplier and the purchaser.
Table 1 Basic Dimensions of Steel Sheet and Strip
Dimensions in millimeters
Basic thickness Width Length
1.4 to 16.0 600 to 2 000 Steel sheet 2 000 to 16 000
Steel strip —
5.2 The dimension, shape and distribution for the checker of steel sheet and strip are for reference only, as Figures 1 through 4. Each dimension in the figures shall be used for the control of roller processing of the manufacturer, and shall not be taken as the criterion of finished steel plate and strip inspection. Other shape of steel sheet and strip may be provided through negotiation between the supplier and the purchaser.
Foreword II
1 Scope
2 Normative References
3 Classification and Code
4 Ordering Information
5 Dimension, Shape and Weight
6 Technical Requirements
7 Test Methods
8 Inspection Rules
9 Packaging, Marking and Quality Certificate
Annex A (Informantive) Theoretical Method for Weight Calculation of Hot Rolling Checker Steel Sheet
Codeofchina.com is in charge of this English translation. In case of any doubt about the contents of English translation, the Chinese original shall be considered authoritative.
This standard is drafted in accordance with the rules given in GB/T 1.1-2009.
This standard was proposed by China Iron and Steel Association.
This standard was prepared by SAC/TC 183 (National Technical Committee 183 on Iron and Steel of Standardization Administration of China).
Hot Rolling Checker Steel Sheet and Strip
1 Scope
This standard specifies the classification, codes, ordering information, dimensions, shape, weight, technical requirements, test methods, inspection rules, packaging, marking and product quality certificate of hot rolling vhecker steel sheet and strip.
This standard is applicable to the rhombic, lenticular, round bean-shaped and combined hot rolling checker steel sheet and strip in thickness of 1.4mm to 16.0mm (hereinafter referred to as "steel sheet and strip").
2 Normative References
The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
GB/T 222 Permissible Tolerances for Chemical Composition of Steel Products
GB/T 228.1 Metallic Materials — Tensile Testing — Part 1: Method of Test at Room Temperature
GB/T 232 Metallic Materials — Bend Test
GB/T 247 General Rule of Package, Mark and Certification for Steel Plates (Sheets) and Strips
GB/T 700 Carbon Structural Steels
GB/T 709 Dimension, Shape, Weight and Tolerances for Hot-rolled Steel Plates and Sheets
GB/T 712 Ship and Ocean Engineering Structural Steel
GB/T 1591 High Strength Low Alloy Structural Steels
GB/T 2975 Steel and Steel Products — Location and Preparation of Test Pieces for Mechanical Testing
GB/T 4171 Atmospheric Corrosion Resisting Structural Steel
GB/T 8170 Rules of Rounding Off for Numerical Values & Expression and Judgment of Limiting Values
GB/T 17505 Steel and Steel Products — General Technical Delivery Requirements
GB/T 20066 Steel and Iron — Sampling and Preparation of Samples for the Determination of Chemical Composition
3 Classification and Code
3.1 Classification according to edge state are as follows:
a) Trimmed: EC;
b) Untrimmed: EM.
3.2 Classification according to checker shape are as follows:
a) Rhombic: LX;
b) Lenticular: BD;
c) Round bean-shaped: YD;
d) Combined: ZH.
4 Ordering Information
4.1 The order contract or order according to this standard shall include the following information:
a) Serial number of this standard;
b) Designation;
c) Product category (steel sheet or strip);
d) Specification;
e) Checker shape;
f) Edge state;
g) Other requirements.
4.2 Example of labelling
Untrimmed lenticular checker steel sheet delivered in accordance with this standard, in designation of Q235B, dimensions of 3.0 mm×1 250 mm×2 500 mm, labelled as:
Lenticular (BD) checker steel sheet Q235B-3.0×1 250 (EM) × 2 500—GB/T 33974-2017
5 Dimension, Shape and Weight
5.1 The dimension of steel sheetw and stripw as specified in Table 1. Other dimensions of steel sheet and strips may also be provided, through negotiation betwwen the supplier and the purchaser.
Table 1 Basic Dimensions of Steel Sheet and Strip
Dimensions in millimeters
Basic thickness Width Length
1.4 to 16.0 600 to 2 000 Steel sheet 2 000 to 16 000
Steel strip —
5.2 The dimension, shape and distribution for the checker of steel sheet and strip are for reference only, as Figures 1 through 4. Each dimension in the figures shall be used for the control of roller processing of the manufacturer, and shall not be taken as the criterion of finished steel plate and strip inspection. Other shape of steel sheet and strip may be provided through negotiation between the supplier and the purchaser.
Contents of GB/T 33974-2017
Foreword II
1 Scope
2 Normative References
3 Classification and Code
4 Ordering Information
5 Dimension, Shape and Weight
6 Technical Requirements
7 Test Methods
8 Inspection Rules
9 Packaging, Marking and Quality Certificate
Annex A (Informantive) Theoretical Method for Weight Calculation of Hot Rolling Checker Steel Sheet
