Q/BQB 430-2023 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| Q/BQB 430-2023 | English | 215 |
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Electrolytically zinc coated steel sheet and strip
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| Q/BQB 430-2021 | English | 95 |
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Electro-galvanized steel plates and steel strips
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| Q/BQB 430-2018 | English | 80 |
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Electro-galvanized steel plates and steel strips
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| Q/BQB 430-2014 | English | 220 |
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Electro-galvanized steel plates and steel strips
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| Q/BQB 430-2009 | English | 299 |
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3 days
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Continuous galvanized zinc / zinc-nickel alloy steel and steel strip
| Obsolete |
Excerpted PDFs (Download full copy in 9 seconds upon purchase)PDF Preview: Q/BQB 430-2023
Q/BQB 430-2023: Electrolytically zinc coated steel sheet and strip---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/QBQB430-2023
BQB
ENTERPRISE STANDARD OF
BAOSHAN IRON AND STEEL CO., LTD
Replacing Q/BQB 430-2021
Electrolytically Zinc Coated Steel Sheet and Strip
Issued on. APRIL 09, 2023
Implemented on. JULY 01, 2023
Issued by. Baoshan Iron and Steel Co., Ltd.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Terms and Definitions... 5
4 Classification and Code... 6
5 Information Required for Ordering... 7
6 Dimensions, Appearance, Weight and Allowable Deviations... 8
7 Technical Requirements... 8
8 Inspection and Test... 14
9 Packaging, Marking and Inspection Documents... 15
10 Numerical Rounding-off Rules... 15
Appendix A (Normative) Weight Calculation Method in Theoretical Weighing... 16
Appendix B (Normative) Method for Assessing the Severity of Surface Corrosion of
Fingerprint-Resistant Films... 17
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This Document was formulated by reference of EN 10152.2017 and JIS G 3313.2015.
This Document replaced Q/BQB 430-2021.Compared with Q/BQB 430-2021, the major
change contents are as follows besides the editorial modifications.
--- Add the online X-ray fluorescence test method for coating weight and clarify the
sampling requirements for the three detection methods of coating weight.
The Appendixes A and B of this Document are normative.
This Document was proposed by Manufacturing and Management Department of Baoshan Iron
and Steel Co., Ltd.
This Document shall be under the jurisdiction of Manufacturing and Management Department
of Baoshan Iron and Steel Co., Ltd.
This Document was drafted by Manufacturing and Management Department of Baoshan Iron
and Steel Co., Ltd.
Chief drafting staffs of this Document. Hu Ling.
The historical editions replaced by this Document are as follows. Q/BQB 430-1988, Q/BQB
430-1994, Q/BQB 430-1999, Q/BQB 430-2003, Q/BQB 430-2009, Q/BQB 430-2014, Q/BQB
430-2018, Q/BQB 430-2021.
Electrolytically Zinc Coated Steel Sheet and Strip
1 Scope
This Document stipulates the terms and definitions, classification and codes, dimensions,
appearance, technical requirements, inspection and test, packaging, marking and inspection
documents of electrolytically zinc coated steel sheet and strip.
This Document applies to electrolytically zinc coated steel sheet and strip produced by Baoshan
Iron and Steel Co., Ltd., hereinafter referred to as steel sheet and strip.
NOTE. Since the coating weight of electrolytically zinc coated steel sheet and strip is relatively small,
they are not suitable for outdoor exposure without surface chemical treatment and painting.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 1839 Steel product zinc coating mass testing method
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of
limiting values
GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests
YB/T 4829 Determination of metallic coating mass on steel - On-line X-ray fluorescence
method
3 Terms and Definitions
3.1 Electrolytically zinc coated layer (Z)
A dense coating obtained by reducing zinc ions dissolved in the electrolyte through the action
of electric current. More than 99% of the coating is composed of zinc and contains no trace
elements harmful to the bonding strength of the adhesive or the paint performance.
3.4 Excellent conductive type, chromium-free and fingerprint-resistant (NE1)
Chrome-free, fingerprint-resistant coating with excellent conductivity and good corrosion
resistance.
3.5 High-temperature- drying-resistant, chromium-free and fingerprint-resistant (N8)
A chromium-free fingerprint-resistant coating with high corrosion resistance, good
processability, electrical conductivity and good high-temperature-resistant, drying, coating
resistance.
3.6 High-corrosion-resistant, chromium-free and fingerprint-resistant (NC)
Chrome-free, fingerprint-resistant coating with excellent corrosion resistance.
3.7 High heat dissipation type, chromium-free and fingerprint-resistant (NR)
Chrome-free, fingerprint-resistant coating with high radiation heat dissipation.
4 Classification and Code
4.1 Naming method of designation
The designations of steel sheets and strips consist of three parts. substrate designation,
electroplating code (E) and coating type code of pure zinc (Z). The electroplating code (E) and
coating type code are connected by a plus sign "+".
4.2 Examples of designation naming
4.3 According to surface quality, the classification of steel sheets and strips shall comply with
the provisions in Table 1.
4.4 The classification of steel sheets and strips according to coating type, coating weight
expression method and coating surface treatment shall comply with the provisions of Table 2.
5 Information Required for Ordering
5.1 Users need to provide the following information when ordering.
5.2 If the dimensional and unevenness accuracy, surface quality level, surface treatment type
and packaging method are not specified in the order contract, normal dimensional accuracy,
ordinary unevenness accuracy, surface quality level of FB,
6 Dimensions, Appearance, Weight and Allowable Deviations
6.1 The nominal thickness of steel sheets and strips is the sum of the thickness of the substrate
and the thickness of the coating.
6.2 The dimension, appearance and allowable deviation of steel sheets and strips shall comply
with the provisions of Q/BQB 401.
7 Technical Requirements
7.1 Chemical composition
The chemical composition of steel sheets and strips shall comply with the provisions of the
substrate documents listed in this Document.
7.2 Mechanical and process properties
7.3 Coating weight
7.3.1 The available weight range of coating shall comply with the provisions in Table 3.
7.3.3 For equal-thickness coating, the average value of three-point tests on each side of the
7.4 Coating adhesion
Coating adhesion shall be tested using an appropriate test method, which shall be chosen by the
supplier unless otherwise specified.
7.5 Surface quality
7.5.1 The characteristics of each surface quality level shall comply with the provisions of Table
5.
7.6 Surface treatment
7.6.1 Steel sheets and strips are usually delivered by chemically passivated and/or oiled surface
treatment forms. Under normal packaging, transportation, loading and unloading and storage
conditions, the supplier shall ensure that no white rust shall occur on the surface of steel sheets
and strips within 6 months from the date of completion of manufacturing.
7.6.2 During the transportation or storage of steel sheets and strips, all surface treatment forms
can only provide temporary protection for the product surface, and the color of the product
surface may change.
7.6.7 For surface treatment methods involving oiling, the purchaser shall ensure that the
cleaning agent used in its degreasing equipment shall not damage the coating quality.
7.6.8 If the user specifies the untreated surface (U), it shall be clearly stated in the contract. The
supplier shall not bear corresponding product quality responsibility for surface defects such as
white rust, scratches, and friction marks that occur during handling, storage, and use of this
type of product.
7.6.9 The available surface treatments are as follows.
7.6.9.1 Chromium-free passivation (C5)
This surface treatment can reduce white rust on the surface of the product during transportation
and storage, and can also improve the corrosion resistance of the end product. Chromium-free
passivation film limits hexavalent chromium substances that are harmful to human health. It
mainly suitable for general home appliance industry.
7.6.9.2 Chromium-free passivation + oiling (CO5)
The surface treatment is double-sided chromium-free passivation + oiling, which can further
reduce white rust on the product surface. Chromium-free passivation film limits hexavalent
chromium substances that are harmful to human health. It mainly suitable for general home
appliance industry.
7.6.9.8 Chromium-free and fingerprint-resistant (N5)
The surface treatment is a double-sided chromium-free fingerprint-resistant coating, which has
high corrosion resistance, good processability, paintability and electrical conductivity. It mainly
suitable for film-television, and 3C industries, it can be used naked or sprayed.
7.6.9.9 High conductivity, high corrosion resistance, chromium-free and fingerprint
resistant (NE)
8 Inspection and Test
8.1 The appearance of steel sheets and strips shall be visually inspected.
8.2 The dimensions and appearances of steel sheets and strips shall be measured using
appropriate measuring tools.
8.3 Steel sheets and strips shall be inspected in batches. Each batch shall consist of steel of the
same designation, dimension, coating weight and surface treatment, not exceeding 30 tons.
8.6 The inspection of the chemical composition, mechanical properties and other process
properties of each batch of steel sheets and strips shall comply with the provisions of the
corresponding substrate documents.
8.7 The supplier may use different inspection and test methods for acceptance testing. In the
event of a dispute, the inspection and test methods specified in this Document and related
technical requirements shall be used for testing.
8.8 If the test results do not meet the requirements of this Document, double the number of
samples from the same batch shall be randomly selected for reinspecting of the unqualified item.
If the reinspection results (including all indicators required for the test of the item) are qualified,
the entire batch shall be qualified.
9 Packaging, Marking and Inspection Documents
The packaging, marking and inspection documents of steel sheets and strips shall comply with
the requirements of Q/BQB 400.If the purchaser has special requirements for packaging, it can
be negotiated when ordering.
10 Numerical Rounding-off Rules
The numerical judgment adopts the rounding value comparison method, and the numerical
rounding shall comply with the provisions of GB/T 8170.
Q/BQB 430-2023
BQB
ENTERPRISE STANDARD OF
BAOSHAN IRON AND STEEL CO., LTD
Replacing Q/BQB 430-2021
Electrolytically Zinc Coated Steel Sheet and Strip
Issued on. APRIL 09, 2023
Implemented on. JULY 01, 2023
Issued by. Baoshan Iron and Steel Co., Ltd.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative References... 4
3 Terms and Definitions... 5
4 Classification and Code... 6
5 Information Required for Ordering... 7
6 Dimensions, Appearance, Weight and Allowable Deviations... 8
7 Technical Requirements... 8
8 Inspection and Test... 14
9 Packaging, Marking and Inspection Documents... 15
10 Numerical Rounding-off Rules... 15
Appendix A (Normative) Weight Calculation Method in Theoretical Weighing... 16
Appendix B (Normative) Method for Assessing the Severity of Surface Corrosion of
Fingerprint-Resistant Films... 17
Foreword
This Document was drafted as per the rules specified in GB/T 1.1-2020 Directives for
Standardization – Part 1.Rules for the Structure and Drafting of Standardizing Documents.
This Document was formulated by reference of EN 10152.2017 and JIS G 3313.2015.
This Document replaced Q/BQB 430-2021.Compared with Q/BQB 430-2021, the major
change contents are as follows besides the editorial modifications.
--- Add the online X-ray fluorescence test method for coating weight and clarify the
sampling requirements for the three detection methods of coating weight.
The Appendixes A and B of this Document are normative.
This Document was proposed by Manufacturing and Management Department of Baoshan Iron
and Steel Co., Ltd.
This Document shall be under the jurisdiction of Manufacturing and Management Department
of Baoshan Iron and Steel Co., Ltd.
This Document was drafted by Manufacturing and Management Department of Baoshan Iron
and Steel Co., Ltd.
Chief drafting staffs of this Document. Hu Ling.
The historical editions replaced by this Document are as follows. Q/BQB 430-1988, Q/BQB
430-1994, Q/BQB 430-1999, Q/BQB 430-2003, Q/BQB 430-2009, Q/BQB 430-2014, Q/BQB
430-2018, Q/BQB 430-2021.
Electrolytically Zinc Coated Steel Sheet and Strip
1 Scope
This Document stipulates the terms and definitions, classification and codes, dimensions,
appearance, technical requirements, inspection and test, packaging, marking and inspection
documents of electrolytically zinc coated steel sheet and strip.
This Document applies to electrolytically zinc coated steel sheet and strip produced by Baoshan
Iron and Steel Co., Ltd., hereinafter referred to as steel sheet and strip.
NOTE. Since the coating weight of electrolytically zinc coated steel sheet and strip is relatively small,
they are not suitable for outdoor exposure without surface chemical treatment and painting.
2 Normative References
The provisions in following documents become the essential provisions of this Document
through reference in this Document. For the dated documents, only the versions with the dates
indicated are applicable to this Document; for the undated documents, only the latest version
(including all the amendments) is applicable to this Document.
GB/T 1839 Steel product zinc coating mass testing method
GB/T 8170 Rules of rounding off for numerical values & expression and judgement of
limiting values
GB/T 10125 Corrosion tests in artificial atmospheres - Salt spray tests
YB/T 4829 Determination of metallic coating mass on steel - On-line X-ray fluorescence
method
3 Terms and Definitions
3.1 Electrolytically zinc coated layer (Z)
A dense coating obtained by reducing zinc ions dissolved in the electrolyte through the action
of electric current. More than 99% of the coating is composed of zinc and contains no trace
elements harmful to the bonding strength of the adhesive or the paint performance.
3.4 Excellent conductive type, chromium-free and fingerprint-resistant (NE1)
Chrome-free, fingerprint-resistant coating with excellent conductivity and good corrosion
resistance.
3.5 High-temperature- drying-resistant, chromium-free and fingerprint-resistant (N8)
A chromium-free fingerprint-resistant coating with high corrosion resistance, good
processability, electrical conductivity and good high-temperature-resistant, drying, coating
resistance.
3.6 High-corrosion-resistant, chromium-free and fingerprint-resistant (NC)
Chrome-free, fingerprint-resistant coating with excellent corrosion resistance.
3.7 High heat dissipation type, chromium-free and fingerprint-resistant (NR)
Chrome-free, fingerprint-resistant coating with high radiation heat dissipation.
4 Classification and Code
4.1 Naming method of designation
The designations of steel sheets and strips consist of three parts. substrate designation,
electroplating code (E) and coating type code of pure zinc (Z). The electroplating code (E) and
coating type code are connected by a plus sign "+".
4.2 Examples of designation naming
4.3 According to surface quality, the classification of steel sheets and strips shall comply with
the provisions in Table 1.
4.4 The classification of steel sheets and strips according to coating type, coating weight
expression method and coating surface treatment shall comply with the provisions of Table 2.
5 Information Required for Ordering
5.1 Users need to provide the following information when ordering.
5.2 If the dimensional and unevenness accuracy, surface quality level, surface treatment type
and packaging method are not specified in the order contract, normal dimensional accuracy,
ordinary unevenness accuracy, surface quality level of FB,
6 Dimensions, Appearance, Weight and Allowable Deviations
6.1 The nominal thickness of steel sheets and strips is the sum of the thickness of the substrate
and the thickness of the coating.
6.2 The dimension, appearance and allowable deviation of steel sheets and strips shall comply
with the provisions of Q/BQB 401.
7 Technical Requirements
7.1 Chemical composition
The chemical composition of steel sheets and strips shall comply with the provisions of the
substrate documents listed in this Document.
7.2 Mechanical and process properties
7.3 Coating weight
7.3.1 The available weight range of coating shall comply with the provisions in Table 3.
7.3.3 For equal-thickness coating, the average value of three-point tests on each side of the
7.4 Coating adhesion
Coating adhesion shall be tested using an appropriate test method, which shall be chosen by the
supplier unless otherwise specified.
7.5 Surface quality
7.5.1 The characteristics of each surface quality level shall comply with the provisions of Table
5.
7.6 Surface treatment
7.6.1 Steel sheets and strips are usually delivered by chemically passivated and/or oiled surface
treatment forms. Under normal packaging, transportation, loading and unloading and storage
conditions, the supplier shall ensure that no white rust shall occur on the surface of steel sheets
and strips within 6 months from the date of completion of manufacturing.
7.6.2 During the transportation or storage of steel sheets and strips, all surface treatment forms
can only provide temporary protection for the product surface, and the color of the product
surface may change.
7.6.7 For surface treatment methods involving oiling, the purchaser shall ensure that the
cleaning agent used in its degreasing equipment shall not damage the coating quality.
7.6.8 If the user specifies the untreated surface (U), it shall be clearly stated in the contract. The
supplier shall not bear corresponding product quality responsibility for surface defects such as
white rust, scratches, and friction marks that occur during handling, storage, and use of this
type of product.
7.6.9 The available surface treatments are as follows.
7.6.9.1 Chromium-free passivation (C5)
This surface treatment can reduce white rust on the surface of the product during transportation
and storage, and can also improve the corrosion resistance of the end product. Chromium-free
passivation film limits hexavalent chromium substances that are harmful to human health. It
mainly suitable for general home appliance industry.
7.6.9.2 Chromium-free passivation + oiling (CO5)
The surface treatment is double-sided chromium-free passivation + oiling, which can further
reduce white rust on the product surface. Chromium-free passivation film limits hexavalent
chromium substances that are harmful to human health. It mainly suitable for general home
appliance industry.
7.6.9.8 Chromium-free and fingerprint-resistant (N5)
The surface treatment is a double-sided chromium-free fingerprint-resistant coating, which has
high corrosion resistance, good processability, paintability and electrical conductivity. It mainly
suitable for film-television, and 3C industries, it can be used naked or sprayed.
7.6.9.9 High conductivity, high corrosion resistance, chromium-free and fingerprint
resistant (NE)
8 Inspection and Test
8.1 The appearance of steel sheets and strips shall be visually inspected.
8.2 The dimensions and appearances of steel sheets and strips shall be measured using
appropriate measuring tools.
8.3 Steel sheets and strips shall be inspected in batches. Each batch shall consist of steel of the
same designation, dimension, coating weight and surface treatment, not exceeding 30 tons.
8.6 The inspection of the chemical composition, mechanical properties and other process
properties of each batch of steel sheets and strips shall comply with the provisions of the
corresponding substrate documents.
8.7 The supplier may use different inspection and test methods for acceptance testing. In the
event of a dispute, the inspection and test methods specified in this Document and related
technical requirements shall be used for testing.
8.8 If the test results do not meet the requirements of this Document, double the number of
samples from the same batch shall be randomly selected for reinspecting of the unqualified item.
If the reinspection results (including all indicators required for the test of the item) are qualified,
the entire batch shall be qualified.
9 Packaging, Marking and Inspection Documents
The packaging, marking and inspection documents of steel sheets and strips shall comply with
the requirements of Q/BQB 400.If the purchaser has special requirements for packaging, it can
be negotiated when ordering.
10 Numerical Rounding-off Rules
The numerical judgment adopts the rounding value comparison method, and the numerical
rounding shall comply with the provisions of GB/T 8170.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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