GB/T 3524-2015 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 3524-2015 | English | 70 |
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Hot-rolled carbon and low alloy structural steel strips
| Valid |
| GB/T 3524-2005 | English | 279 |
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3 days
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Hot-rolled carbon and low alloy structural steel strips
| Obsolete |
| GB/T 3524-1992 | English | 199 |
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2 days
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Hot-rolled cardon and low alloy structural steel strips
| Obsolete |
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GB/T 3524-2015: Hot-rolled carbon and low alloy structural steel strips---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/GBT3524-2015
GB
NATIONAL STANDARD OF
THE PEOPLE’S REPUBLIC OF CHINA
ICS 77.140.50
H 46
Replacing GB/T 3524-2005
Hot-rolled carbon and low alloy structural steel strips
Issued on. SEPTEMBER 11, 2015
Implemented on. JUNE 1, 2016
Issued by. General Administration of Quality Supervision, Inspection and
Quarantine;
Standardization Administration Committee.
Table of Contents
Foreword... 3
1 Scope... 4
2 Normative references... 4
3 Classification and code... 6
4 Ordering content... 6
5 Size, shape, weight and tolerance... 7
6 Technical requirements... 10
7 Test methods... 12
8 Inspection rules... 13
9 Packaging, marks and quality certificate... 13
10 Rounding of numerical value... 13
Foreword
This Standard was drafted in accordance with the rules given in GB/T 1.1-2009.
This Standard replaces GB/T 3524-2005 Hot-rolled carbon and low alloy
structural steel strips.
Compared with GB/T 3524-2005, The main technical changes are as follows.
- Expanded the range of steel strip specifications;
- Adjusted the tolerance of steel strip thickness;
- Adjusted the tolerance of steel strip width;
- Strengthened the allowable deviation of three-points difference of steel
strip;
- Refined the allowable deviation of same-strip difference of steel strip;
- Adjusted sampling requirements for steel strip;
- Deleted two designations. Q255, Q295;
- Added three designations. Q390, Q420, Q460.
This Standard was proposed by China Iron and Steel Association.
This Standard shall be under the jurisdiction of China National Steel
Standardization Technical Committee (SAC/TC 183).
The drafting organizations of this Standard. Nanjing Iron and Steel Co., Ltd.,
Metallurgical Industry Information Standards Institute, Tangshan Rui Feng Steel
(Group) Co., Ltd..
Main drafters of this Standard. Xu Haiquan, Wang Duanjun, Ren Cuiying, Zhan
Shengling, Zhang Weixu, Dong Hongshan, Gao Yan, Li Xuesong.
This Standard replaces the following previous standards.
- GB/T 3524-1983, GB/T 3524-1992, GB/T 3524-2005.
Hot-rolled carbon and low alloy structural steel strips
1 Scope
This Standard specified the classification and code, ordering content, size,
shape, weight and tolerance, technical requirements, test methods, inspection
rules, packaging, marks and quality certification, etc. of hot-rolled carbon and
low alloy structural steel strips.
This Standard applies to hot-rolled carbon and low alloy structural steel strips
of which thickness is not greater than 12.00 mm, the width is not greater than
600 mm (hereinafter referred to as “steel strips”).
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 223.3 Methods for chemical analysis of iron, steel and alloy – The
diantipyrylmethane phosphomolybdate gravimetric method for the
determination of phosphorus content
GB/T 223.5 Methods for chemical analysis of iron, steel and alloy - The
reduced molybdosilicate spectrophotometric method for the determination of
acid-soluble silicon content
GB/T 223.9 Methods for chemical analysis of iron, steel and alloy - The
chrom azurol S photometric method for the determination of aluminium
content
3 Classification and code
3.1 Classify according to edge state
3.2 Classify according to thickness precision.
4 Ordering content
4.1 Order contract shall contain the following information.
4.2 If the contract does not specify the edge state, thickness precision,
delivery status, the steel strips shall be delivered as un-trimming, ordinary
thickness precision, hot-rolled state.
5 Size, shape, weight and tolerance
5.1 Steel strip thickness and tolerance
5.1.1 Steel strip thickness and tolerance shall comply with provisions in Table
1.
5.2 Steel strip width and tolerance
5.2.1 Steel strip width and tolerance shall comply with provisions in Table 2.
5.2.2 According to buyer’s requirements, it can make appropriate adjustments
to steel strip width deviation within the tolerance range.
5.3 Three-points difference
Steel strip thickness shall be uniform. Measure the thickness of three-points in
the middle and on both sides of the same section. Its maximum difference
(three-points difference) shall comply with provisions in Table 3.
5.4 Same-strip difference
The thickness of steel strip in the rolling direction shall be uniform. Determine
any three-points on a same straight line. Its maximum difference (same-strip
difference) shall comply with provisions in Table 4.
5.5 Shape
5.5.1 Steel strips shall be delivered in rolls.
5.6 Non-examination range of both ends of steel strips
At time of measurement of steel strip’s width, thickness, camber, three-points
difference, same-strip difference, the non-examination range of both ends shall
comply with provisions in Table 5.
6 Technical requirements
6.1 Designation and chemical composition of steel strip
6.1.1 When steel strip uses carbon structural steel rolling, its chemical
composition (melting analysis) shall comply with provisions of GB/T 700.
6.2 Delivery status
When steel strips are delivered in hot-rolled state, according to buyer’s
requirements, agreed by both parties, it shall provide steel strips of surface
pickling state or other special requirements.
6.3 Mechanical properties
6.4 Surface quality
6.4.1 Surface of steel strip does not allow any air bubbles, scarring, cracks,
folds, mixed and pressed iron oxide scale. Steel strip does not allow
stratification. Slight red iron oxide is allowed. Local defects like pits, bumps,
scratches, pitting of which the depth or height does not exceed half of thickness
tolerance are allowed. Its depth or height is calculated from the actual
dimension.
6.4.5 In the continuous production process of steel strip, local surface defects
are not easy to discover and remove. Therefore, the delivery with defects is
allowed. The defect part must not exceed 8% of total length of each roll of steel
strip.
7 Test methods
7.1 The inspection items, sampling amount, sampling methods and test
methods of each batch of steel strips shall comply with provisions in Table 7.
Table 7 Inspection items, sampling amount, sampling methods and test
methods of steel strips
7.4 When measuring camber of steel strip, make the straightedge closely
against the concave side of steel strip. Measure the maximum distance from
the straightedge to the concave side.
8 Inspection rules
8.1 The steel strip inspection and acceptance shall be performed by the
technical quality supervision department of seller.
8.2 Steel strips shall be inspected and accepted in batch. A batch is composed
by steel strips of same designation, same furnace number, same specification
and same delivery status.
9 Packaging, marks and quality certificate
The packaging, marks and quality certificate of steel strips shall comply with
provisions of GB/T 247.
10 Rounding of numerical value
This Standard uses rounding value comparison method. The rounding rules
shall comply with 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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