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GB/T 3207-2008 English PDF (GB/T3207-2008)
GB/T 3207-2008 English PDF (GB/T3207-2008)
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GB/T 3207-2008: Bright steel
GB/T 3207-2008
Bright steel
ICS 77.140.60
H44
National Standards of People's Republic of China
Replace GB/T 3207-1988
Silver bright steel
2008-08-05 released
Implementation of.2009-04-01
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Issued by China National Standardization Administration
Preface
This standard replaces GB/T 3207-1988 "Silver Steel".
Compared with GB/T 3207-1988, the main technical changes of this standard are as follows.
---The diameter range of silver bright steel is expanded from 0.6mm～80mm to 1.0mm～180mm;
---Increase the definition of silver bright steel and peeling material, and modify the definition of polished material;
---Cancel the "grind and pull" in the original standard delivery status;
---Increase the reference cross-sectional area and reference weight with a diameter greater than 80mm;
---Modified the diameter range corresponding to the allowable deviation of the diameter, combined the diameter 0.6mm～1.0mm and >1.0mm～3.0mm
For diameters ≤3.0mm, the specification range of more than 50mm is divided into three specification ranges. >50mm～80mm, >80mm～
120mm, >120mm～180mm;
---Increase the allowable tolerance level of the diameter of silver bright steel, from 7 to 11 to 6 to 13;
---Modify the length of silver bright steel, tighten the allowable deviation of the length;
---Modify the requirements for the appearance of silver bright steel. The silver bright steel with a diameter of no more than 10mm is allowed to be delivered in a coiled state. The modification is made by both parties
It is negotiated that silver bright steel can be delivered in coiled state;
--- Modify the curvature to straightness;
---Modify the flatness index, cancel the index requirement of total curvature;
---Modify the shape requirements of the silver bright steel end;
---Cancel mark example;
---Increase the performance requirements of silver bright steel;
---Increase roughness requirements;
---Modify packaging requirements, increase specific requirements for transportation and storage.
This standard was proposed by the China Iron and Steel Association.
This standard is under the jurisdiction of the National Steel Standardization Technical Committee.
Drafting organizations of this standard. Northeast Special Steel Group Co., Ltd., Metallurgical Industry Information Standards Research Institute.
The main drafters of this standard. Zhen Juan, Yang Liu, Wang Lingjun, Dai Shifeng, Zhou Minjun, Xu Meijian.
The previous editions replaced by this standard are as follows.
---GB/T 3207-1982, GB/T 3207-1988.
1 scope
This standard specifies the terms and definitions, classification code, size, shape, weight and allowable deviations, technical requirements, test methods,
Requirements for inspection rules, signs and quality certificates, packaging, transportation and storage.
This standard is applicable to stripped, polished and polished round steel with high requirements for surface quality.
2 Normative references
The clauses in the following documents become clauses of this standard after being quoted in this standard. For dated reference documents, all subsequent
Amendments (not including errata content) or revisions do not apply to this standard. However, all parties that have reached an agreement based on this standard are encouraged to study
Is the latest version of these files available? For undated references, the latest version is applicable to this standard.
GB/T 2101 General requirements for acceptance, packaging, marking and quality certificate of section steel
GB/T 2103 General requirements for steel wire acceptance, packaging, marking and quality certificate
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Round steel with no rolling defects and decarburized layer on the surface, and with a bright surface. It can be subdivided into peeling materials, polishing materials and polishing materials.
3.2
After removing the rolling defects and decarburized layer by turning and peeling, the round steel is straightened.
3.3
Round steel that has been polished after drawing or peeling.
3.4
Round steel that is polished after drawing, turning, peeling or polishing.
4 Classification code
Silver bright steel is divided into three categories according to the final cold working method. The classification code is shown in Table 1.
Table 1 Classification and code of silver bright steel
5 Dimensions, appearance, weight and allowable deviation
5.1 The cross-sectional shape and marking symbols are shown in Figure 1.
GB/T 3207-2008
Figure 1 Sectional shape and marking symbols
5.3 According to the request of the buyer and indicated in the contract, silver bright steel of intermediate size can be supplied, but the intermediate size is not recommended.
5.4 Allowable deviation of diameter
5.4.1 The allowable deviation of the diameter of the silver bright steel shall meet the requirements of Table 4.The allowable deviation level of diameter should be specified in the contract or according to the corresponding product standard
Standard regulations. If not specified, the diameter is less than 80mm to be supplied according to grade 11 of this standard, and those with a diameter of more than 80mm are supplied according to grade 12 of this standard.
5.4.2 The allowable deviation of the diameter is limited to the position greater than 100mm from the end.
5.4.3 According to the requirements of the buyer, after negotiation between the supplier and the buyer and indicated in the contract, silver bright steel with other precision requirements can be provided.
5.4.4 According to the request of the buyer and specified in the contract, silver bright steel with positive or negative deviation can be supplied.
5.5 Straight length and allowable deviation
5.5.1 The usual length should meet the requirements of Table 5.Short-length materials not less than 1.5m are allowed to be delivered, but their weight shall not exceed the delivery weight.
15%. According to the request of the buyer, after negotiation between the two parties and indicated in the contract, silver bright steel with special length can be supplied.
5.5.2 The fixed-length or double-length required for silver bright steel shall be indicated in the contract, and the allowable deviation of the length is +500mm. According to the buyer’s request,
The supply and demand sides negotiate and specify in the contract, and can provide steel with special length tolerance.
Table 4 The allowable deviation of silver bright steel diameter is in millimeters
5.6.3 The ends of the silver bright steel should be cut straight and there should be no radial spurs, but axial spurs of no more than 1mm are allowed; the diameter should not be larger than
19mm silver bright steel is allowed to have shear deformation due to shearing that does not affect use. According to user requirements and specified in the contract, the end can be chamfered for delivery.
6 Technical requirements
6.1 Brand and chemical composition
The grade and chemical composition of silver bright steel shall meet the requirements of the corresponding technical standards.
6.2 Delivery status
6.2.1 The delivery status of silver bright steel is divided into three types. peeling, polishing and polishing according to different cold working methods.
6.2.2 Before the production of silver bright steel, heat treatment can be carried out according to the capacity of the cold processing equipment or according to the requirements of the buyer.
6.2.3 According to the requirements of the buyer and specified in the contract, the finished silver steel can be supplied in a heat-treated state.
GB/T 3207-2008
6.3 Mechanical properties and technological properties
The mechanical properties of the silver bright steel (excluding the properties of the heat treatment of the sample) and the process properties are allowed to fluctuate by ±10% from the corresponding technical standards.
The mechanical properties of the heat treatment of the specimen shall meet the requirements of the corresponding standard.
6.4 Macrostructure
The macrostructure of Yinliang steel should meet the requirements of the corresponding technical standards.
6.5 Macrostructure
6.5.2 The macrostructure of silver bright steel shall meet the requirements of the corresponding technical standards.
6.6 Surface quality
6.6.1 The surface of the silver bright steel should be clean and smooth, and there should be no external defects such as cracks, hair lines, folds, scratches, concave surfaces, scars, rust, and oxide scale.
The existence of sinking, allowing individual slight scratches, straightening and peeling spirals with a depth not exceeding half the tolerance, silver bright steel after heat treatment
Oxidation color is allowed.
6.6.2 The surface roughness of silver bright steel shall meet the requirements of Table 7.If the supplier can guarantee that the roughness is qualified, the inspection is not required.
6.6.3 According to the requirements of the buyer, after negotiation between the two parties and indicated in the contract, steel materials with special roughness requirements can be provided.
7 Test method
7.1 The size and shape of silver bright steel shall be measured with appropriate precision measuring tools.
7.2 The chemical composition, mechanical properties, process performance, macrostructure and macrostructure of silver bright steel shall be tested according to the corresponding product standards
Method for testing.
7.3 The surface quality of silver bright steel shall be inspected visually and with corresponding precision measuring tools.
7.4 The surface roughness of the silver bright steel can be measured by the sample comparison method or by the corresponding precision instrument.
8 Inspection rules
The surface quality, size, shape and allowable deviation of silver bright steel shall be inspected one by one. The inspection rules for other items shall be in accordance with the corresponding product standards.
9 Marks and quality certificates
The silver bright steel logo and quality certificate shall meet the requirements of GB/T 2101 or GB/T 2103.
10.Packaging, transportation and storage
10.1 Silver-bright steel should be packaged in anti-rust packaging, specifically in accordance with the provisions of GB/T 2103 and GB/T 2101.
10.2 According to the request of the buyer, after negotiation between the two parties and indicated in the contract, silver bright steel with special packaging requirements can be provided.
10.3 During transportation, silver bright steel should be loaded and unloaded steadily, stacked neatly, and should be placed in a dry place, with dry stows on the bottom layer to prevent moisture.
Get Quotation: Click GB/T 3207-2008 (Self-service in 1-minute)
Historical versions (Master-website): GB/T 3207-2008
Preview True-PDF (Reload/Scroll-down if blank)
GB/T 3207-2008: Bright steel
GB/T 3207-2008
Bright steel
ICS 77.140.60
H44
National Standards of People's Republic of China
Replace GB/T 3207-1988
Silver bright steel
2008-08-05 released
Implementation of.2009-04-01
General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China
Issued by China National Standardization Administration
Preface
This standard replaces GB/T 3207-1988 "Silver Steel".
Compared with GB/T 3207-1988, the main technical changes of this standard are as follows.
---The diameter range of silver bright steel is expanded from 0.6mm～80mm to 1.0mm～180mm;
---Increase the definition of silver bright steel and peeling material, and modify the definition of polished material;
---Cancel the "grind and pull" in the original standard delivery status;
---Increase the reference cross-sectional area and reference weight with a diameter greater than 80mm;
---Modified the diameter range corresponding to the allowable deviation of the diameter, combined the diameter 0.6mm～1.0mm and >1.0mm～3.0mm
For diameters ≤3.0mm, the specification range of more than 50mm is divided into three specification ranges. >50mm～80mm, >80mm～
120mm, >120mm～180mm;
---Increase the allowable tolerance level of the diameter of silver bright steel, from 7 to 11 to 6 to 13;
---Modify the length of silver bright steel, tighten the allowable deviation of the length;
---Modify the requirements for the appearance of silver bright steel. The silver bright steel with a diameter of no more than 10mm is allowed to be delivered in a coiled state. The modification is made by both parties
It is negotiated that silver bright steel can be delivered in coiled state;
--- Modify the curvature to straightness;
---Modify the flatness index, cancel the index requirement of total curvature;
---Modify the shape requirements of the silver bright steel end;
---Cancel mark example;
---Increase the performance requirements of silver bright steel;
---Increase roughness requirements;
---Modify packaging requirements, increase specific requirements for transportation and storage.
This standard was proposed by the China Iron and Steel Association.
This standard is under the jurisdiction of the National Steel Standardization Technical Committee.
Drafting organizations of this standard. Northeast Special Steel Group Co., Ltd., Metallurgical Industry Information Standards Research Institute.
The main drafters of this standard. Zhen Juan, Yang Liu, Wang Lingjun, Dai Shifeng, Zhou Minjun, Xu Meijian.
The previous editions replaced by this standard are as follows.
---GB/T 3207-1982, GB/T 3207-1988.
1 scope
This standard specifies the terms and definitions, classification code, size, shape, weight and allowable deviations, technical requirements, test methods,
Requirements for inspection rules, signs and quality certificates, packaging, transportation and storage.
This standard is applicable to stripped, polished and polished round steel with high requirements for surface quality.
2 Normative references
The clauses in the following documents become clauses of this standard after being quoted in this standard. For dated reference documents, all subsequent
Amendments (not including errata content) or revisions do not apply to this standard. However, all parties that have reached an agreement based on this standard are encouraged to study
Is the latest version of these files available? For undated references, the latest version is applicable to this standard.
GB/T 2101 General requirements for acceptance, packaging, marking and quality certificate of section steel
GB/T 2103 General requirements for steel wire acceptance, packaging, marking and quality certificate
3 Terms and definitions
The following terms and definitions apply to this standard.
3.1
Round steel with no rolling defects and decarburized layer on the surface, and with a bright surface. It can be subdivided into peeling materials, polishing materials and polishing materials.
3.2
After removing the rolling defects and decarburized layer by turning and peeling, the round steel is straightened.
3.3
Round steel that has been polished after drawing or peeling.
3.4
Round steel that is polished after drawing, turning, peeling or polishing.
4 Classification code
Silver bright steel is divided into three categories according to the final cold working method. The classification code is shown in Table 1.
Table 1 Classification and code of silver bright steel
5 Dimensions, appearance, weight and allowable deviation
5.1 The cross-sectional shape and marking symbols are shown in Figure 1.
GB/T 3207-2008
Figure 1 Sectional shape and marking symbols
5.3 According to the request of the buyer and indicated in the contract, silver bright steel of intermediate size can be supplied, but the intermediate size is not recommended.
5.4 Allowable deviation of diameter
5.4.1 The allowable deviation of the diameter of the silver bright steel shall meet the requirements of Table 4.The allowable deviation level of diameter should be specified in the contract or according to the corresponding product standard
Standard regulations. If not specified, the diameter is less than 80mm to be supplied according to grade 11 of this standard, and those with a diameter of more than 80mm are supplied according to grade 12 of this standard.
5.4.2 The allowable deviation of the diameter is limited to the position greater than 100mm from the end.
5.4.3 According to the requirements of the buyer, after negotiation between the supplier and the buyer and indicated in the contract, silver bright steel with other precision requirements can be provided.
5.4.4 According to the request of the buyer and specified in the contract, silver bright steel with positive or negative deviation can be supplied.
5.5 Straight length and allowable deviation
5.5.1 The usual length should meet the requirements of Table 5.Short-length materials not less than 1.5m are allowed to be delivered, but their weight shall not exceed the delivery weight.
15%. According to the request of the buyer, after negotiation between the two parties and indicated in the contract, silver bright steel with special length can be supplied.
5.5.2 The fixed-length or double-length required for silver bright steel shall be indicated in the contract, and the allowable deviation of the length is +500mm. According to the buyer’s request,
The supply and demand sides negotiate and specify in the contract, and can provide steel with special length tolerance.
Table 4 The allowable deviation of silver bright steel diameter is in millimeters
5.6.3 The ends of the silver bright steel should be cut straight and there should be no radial spurs, but axial spurs of no more than 1mm are allowed; the diameter should not be larger than
19mm silver bright steel is allowed to have shear deformation due to shearing that does not affect use. According to user requirements and specified in the contract, the end can be chamfered for delivery.
6 Technical requirements
6.1 Brand and chemical composition
The grade and chemical composition of silver bright steel shall meet the requirements of the corresponding technical standards.
6.2 Delivery status
6.2.1 The delivery status of silver bright steel is divided into three types. peeling, polishing and polishing according to different cold working methods.
6.2.2 Before the production of silver bright steel, heat treatment can be carried out according to the capacity of the cold processing equipment or according to the requirements of the buyer.
6.2.3 According to the requirements of the buyer and specified in the contract, the finished silver steel can be supplied in a heat-treated state.
GB/T 3207-2008
6.3 Mechanical properties and technological properties
The mechanical properties of the silver bright steel (excluding the properties of the heat treatment of the sample) and the process properties are allowed to fluctuate by ±10% from the corresponding technical standards.
The mechanical properties of the heat treatment of the specimen shall meet the requirements of the corresponding standard.
6.4 Macrostructure
The macrostructure of Yinliang steel should meet the requirements of the corresponding technical standards.
6.5 Macrostructure
6.5.2 The macrostructure of silver bright steel shall meet the requirements of the corresponding technical standards.
6.6 Surface quality
6.6.1 The surface of the silver bright steel should be clean and smooth, and there should be no external defects such as cracks, hair lines, folds, scratches, concave surfaces, scars, rust, and oxide scale.
The existence of sinking, allowing individual slight scratches, straightening and peeling spirals with a depth not exceeding half the tolerance, silver bright steel after heat treatment
Oxidation color is allowed.
6.6.2 The surface roughness of silver bright steel shall meet the requirements of Table 7.If the supplier can guarantee that the roughness is qualified, the inspection is not required.
6.6.3 According to the requirements of the buyer, after negotiation between the two parties and indicated in the contract, steel materials with special roughness requirements can be provided.
7 Test method
7.1 The size and shape of silver bright steel shall be measured with appropriate precision measuring tools.
7.2 The chemical composition, mechanical properties, process performance, macrostructure and macrostructure of silver bright steel shall be tested according to the corresponding product standards
Method for testing.
7.3 The surface quality of silver bright steel shall be inspected visually and with corresponding precision measuring tools.
7.4 The surface roughness of the silver bright steel can be measured by the sample comparison method or by the corresponding precision instrument.
8 Inspection rules
The surface quality, size, shape and allowable deviation of silver bright steel shall be inspected one by one. The inspection rules for other items shall be in accordance with the corresponding product standards.
9 Marks and quality certificates
The silver bright steel logo and quality certificate shall meet the requirements of GB/T 2101 or GB/T 2103.
10.Packaging, transportation and storage
10.1 Silver-bright steel should be packaged in anti-rust packaging, specifically in accordance with the provisions of GB/T 2103 and GB/T 2101.
10.2 According to the request of the buyer, after negotiation between the two parties and indicated in the contract, silver bright steel with special packaging requirements can be provided.
10.3 During transportation, silver bright steel should be loaded and unloaded steadily, stacked neatly, and should be placed in a dry place, with dry stows on the bottom layer to prevent moisture.
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