GB/T 3880.3-2024_English: PDF (GB/T3880.3-2024)
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Wrought aluminium and aluminium alloy plates, sheets and strips for general engineering - Part 3: Tolerances on forms and dimensions
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GB/T 3880.3-2024
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GB/T 3880.3-2012 | English | 125 |
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Wrought aluminium and aluminium alloy plates, sheets and strips for general engineering -- Part 3: Tolerances on forms and dimensions
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GB/T 3880.3-2012
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GB/T 3880.3-2006 | English | 519 |
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Wrought aluminium and aluminium alloy plates, sheets and strips for general engineering -- Part 3: Tolerances on forms and dimensions
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GB/T 3880.3-2006
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Standard ID | GB/T 3880.3-2024 (GB/T3880.3-2024) | Description (Translated English) | Wrought aluminium and aluminium alloy plates, sheets and strips for general engineering - Part 3: Tolerances on forms and dimensions | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | H61 | Classification of International Standard | 77.150.10 | Word Count Estimation | 22,292 | Date of Issue | 2024-04-25 | Date of Implementation | 2024-11-01 | Older Standard (superseded by this standard) | GB/T 3880.3-2012 | Drafting Organization | Southwest Aluminum (Group) Co., Ltd., Fujian Nan Aluminum Strip Processing Co., Ltd., Nonferrous Metals Technology and Economic Research Institute Co., Ltd., Northeast Light Alloy Co., Ltd., Chalco Ruimin Co., Ltd., Xiamen Xiashun Aluminum Foil Co., Ltd., Jiangsu Dingsheng New Energy Materials Co., Ltd., Youyan Engineering Technology Research Institute Co., Ltd., Yinbang Metal Composite Materials Co., Ltd., Zhejiang Yongjie Aluminum Co., Ltd., Guizhou Guilu New Materials Co., Ltd., Guangxi Nannan Aluminum Processing Co., Ltd., Tianjin Zhongwang Aluminum Co., Ltd., Guangxi Guangtou Liuzhou Aluminum Co., Ltd., Shandong Nanshan Aluminum Co., Ltd. | Administrative Organization | National Technical Committee on Standardization of Nonferrous Metals (SAC/TC 243) | Proposing organization | China Nonferrous Metals Industry Association | Issuing agency(ies) | State Administration for Market Regulation, National Standardization Administration | Standard ID | GB/T 3880.3-2012 (GB/T3880.3-2012) | Description (Translated English) | Wrought aluminium and aluminium alloy plates, sheets and strips for general engineering. Part 3: Tolerances on forms and dimensions | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | H61 | Classification of International Standard | 77.150.10 | Word Count Estimation | 15,155 | Older Standard (superseded by this standard) | GB/T 3880.3-2006 | Adopted Standard | EN 485.3-2003, NEQ; EN 485.4-1994, NEQ | Drafting Organization | Southwest Aluminum (Group)Co., Ltd. | Administrative Organization | National Standardization Technical Committee of non-ferrous metals | Regulation (derived from) | National Standards Bulletin No. 41 of 2012 | Issuing agency(ies) | General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China | Summary | This standard specifies the general industrial aluminum and aluminum alloy sheet, strip the size of the deviation. This section applies to general industrial aluminum and aluminum alloy rolled sheet, strip. | Standard ID | GB/T 3880.3-2006 (GB/T3880.3-2006) | Description (Translated English) | Wrought aluminium and aluminium alloy plates, sheets and strips for general engineering. Part 3: Tolerances on forms and dimensions | Sector / Industry | National Standard (Recommended) | Classification of Chinese Standard | H61 | Classification of International Standard | 77.150.10 | Word Count Estimation | 13,150 | Date of Issue | 2006-09-26 | Date of Implementation | 2007-02-01 | Older Standard (superseded by this standard) | GB/T 3194-1998 | Drafting Organization | Southwest Aluminum (Group) Co., Ltd. | Administrative Organization | National Nonferrous Metals Standardization Technical Committee | Regulation (derived from) | National Standard Approval Announcement 2006 No.10 (Total No.97); National Standard Announcement 2012 No.41 | Proposing organization | China Nonferrous Metals Industry Association | Issuing agency(ies) | Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China; Standardization Administration of China | Summary | This standard specifies the general industrial aluminum and aluminum alloy plate, dimensional variation of the strip. This section applies to general industrial aluminum and aluminum alloy rolled plate, strip. |
GB/T 3880.3-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.10
CCS H 61
Replacing GB/T 3880.3-2012
Wrought aluminum and aluminum alloy plates, sheets and
strips for general engineering - Part 3: Tolerances on forms
and dimensions
ISSUED ON: APRIL 25, 2024
IMPLEMENTED ON: NOVEMBER 01, 2024
Issued by: State Administration for Market Regulation;
National Standardization Administration.
Table of Contents
Foreword ... 3
Introduction ... 5
1 Scope ... 6
2 Normative references ... 6
3 Terms and definitions ... 6
4 Symbols ... 6
5 Deviation grade ... 7
6 Technical requirements ... 7
7 Test methods ... 20
Foreword
This document was drafted in accordance with the provisions of GB/T 1.1-2020
"Directives for standardization - Part 1: Rules for the structure and drafting of
standardizing documents".
This document is Part 3 of GB/T 3880 "Wrought aluminum and aluminum alloy plates,
sheets and strips for general engineering". GB/T 3880 has published the following parts:
- Part 1: Technical conditions of delivery;
- Part 2: Mechanical properties;
- Part 3: Tolerances on forms and dimensions.
This document replaces GB/T 3880.3-2012 "Wrought aluminum and aluminum alloy
plates, sheets and strips for general engineering - Part 3: Tolerances on forms and
dimensions". Compared with GB/T 3880.3-2012, in addition to structural adjustments
and editorial changes, the main technical changes are as follows:
a) DELETE the A and B alloy classifications (see 2.1.1 of the 2012 edition);
b) CHANGE the maximum thickness of cold-rolled plates and strips from 6.00 mm
to 7.00 mm, the maximum thickness of hot-rolled plates from 250.00 mm to
435.00 mm; CHANGE the thickness tolerance requirements; ADD the thickness
range requirements (see 6.1; 3.1 of the 2012 edition);
c) CHANGE the width deviation (see 6.2; 3.2 of the 2012 edition);
d) CHANGE the length deviation of the plate (see 6.3; 3.3 of the 2012 edition);
e) CHANGE the requirements for plate roughness; ADD the requirements for strip
roughness (see 6.4; 3.4 of the 2012 edition);
f) ADD the ordinary level requirements for plate diagonal deviation; CHANGE the
high-precision level requirements for diagonal deviation (see 6.6; 3.6 of the 2012
edition);
g) ADD the requirements for convexity (see 6.7);
h) ADD the requirements for roughness (see 6.8);
i) ADD the requirements for strip staggering and tower shape (see 6.9).
Please note that some contents of this document may involve patents. The issuing
agency of this document does not assume the responsibility for identifying patents.
Wrought aluminum and aluminum alloy plates, sheets and
strips for general engineering - Part 3: Tolerances on forms
and dimensions
1 Scope
This document specifies the dimensional deviation grade, technical requirements, test
methods of general industrial aluminum and aluminum alloy plates and strips.
This document applies to general industrial aluminum and aluminum alloy rolled plates
and strips (hereinafter referred to as "plates and strips").
2 Normative references
The contents of the following documents constitute the essential terms of this document
through normative references in the text. Among them, for dated references, only the
version of that date applies to this document; for undated references, the latest version
(including all amendments) applies to this document.
GB/T 1031 Geometrical product specifications (GPS) - Surface texture: Profile
method - Surface roughness parameters and their values
GB/T 8005.1 Aluminium and aluminium alloy terms and definitions - Part 1:
Product and method of processing and treatment
GB/T 8170 Rules of rounding off for numerical values and expression and
judgement of limiting values
GB/T 26492.3 Defects of wrought aluminium and aluminium alloys ingots and
products - Part 3: Defects for plates, sheets and strips
3 Terms and definitions
The terms and definitions, which are defined in GB/T 8005.1 and GB/T 26492.3, apply
to this document.
4 Symbols
The symbols in Table 1 apply to this document.
6.7 Center convexity
When the buyer has requirements for the center convexity of plates and strips, the
supplier and buyer shall negotiate and determine, meanwhile indicate in the order (or
contract). The convexity of the mother plate or mother strip of the plate or strip shall be
0% ~ 1.5%.
6.8 Roughness
When the purchaser has requirements for the surface roughness of cold-rolled plates
and strips, the supplier and the purchaser shall negotiate and determine, meanwhile
indicate it in the order (or contract). The surface roughness (Ra) of cold-rolled plates
and strips shall not exceed 0.50 μm.
6.9 Staggered layers and tower shapes
The staggered layers of strips shall not exceed 3 mm; the tower shape shall not exceed
10 mm (except for the inner 5 circles and the outer 2 circles). When the purchaser has
special requirements for the staggered layers and tower shapes of strips, the supplier
and the purchaser shall negotiate and determine, meanwhile indicate it in the order (or
contract).
6.10 Others
Where there are other requirements for the dimensional deviation of plates and strips,
the supplier and the purchaser shall negotiate and determine, meanwhile indicate it in
the order (or contract).
7 Test methods
7.1 Dimension rounding
Dimension measurement values are not allowed to be rounded off; the method for
determining the limit value shall comply with the provisions of GB/T 8170.
7.2 Thickness
The thickness of plates and strips shall be measured at a distance of not less than 10
mm from the side and not less than 115 mm from the end, using a micrometer which
has an accuracy of 0.01 mm or a measuring tool which has the same accuracy.
7.3 Width and length
The width and length of plates and strips shall be measured using tools which have
corresponding accuracy.
7.4 Unevenness
7.4.1 Unevenness of plate
7.4.1.1 General requirements
7.4.1.1.1 Place the plate freely on the platform; wait for it to balance and stabilize;
measure the warping height of the end. Use tools of corresponding accuracy to measure
the gap value (i.e. wave height) between the plate surface and the platform. For plates
with multiple waves, the corresponding wave distance shall also be measured. When
making measurement:
- Where there are several waves on a plate at the same time, it shall measure the
largest one;
- Edge waves can be directly measured by a feeler gauge or ruler;
- The middle waves of products which have a thickness greater than 2.0 mm are
measured by a level ruler, ruler or wedge ruler. The level ruler shall be parallel to
the platform during measurement. If it is not parallel, it shall be parallelized with
the help of a pad;
- The middle waves of products, which have a thickness of no more than 2.0 mm,
are measured by straightening with a feeler gauge or a thin wire (preferably a
polyamide wire). The weight of the straightened thin wire shall not deform the plate.
7.4.1.1.2 Calculate the roughness according to the wave height and length (or
width/wave distance). The value is expressed as a percentage, dimensionless; the
calculation result is expressed to one decimal place. The value is rounded off according
to the provisions of GB/T 8170.
7.4.1.2 Single wave unevenness
7.4.1.2.1 Measure the length and wave height of the plate, as shown in Figure 1. Divide
the wave height by the length of the plate to obtain the longitudinal roughness (d0/l).
......
GB/T 3880.3-2012
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.10
H 61
Replacing GB/T 3880.3-2006
Wrought aluminium and aluminium alloy plates,
sheets and strips for general engineering –
Part 3. Tolerances on forms and dimensions
ISSUED ON. DECEMBER 31, 2012
IMPLEMENTED ON. OCTOBER 1, 2013
Issued by. General Administration of Quality Supervision, Inspection
and Quarantine of the People’s Republic of China;
Standardization Administration of the People’s Republic of
China.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Classification and grading ... 5
3 Requirements ... 6
4 Inspection methods for tolerances on dimensions ... 16
5 Others ... 19
Foreword
GB/T 3880 Wrought aluminium and aluminium alloy plates, sheets and strips
for general engineering is divided into three parts.
— Part 1. Technical conditions of delivery;
— Part 2. Mechanical properties;
— Part 3. Tolerances on forms and dimensions.
This Part is part 3 of GB/T 3880.
This Part is drafted according to the rules given in GB/T 1.1-2009.
This Part replaces GB/T 3880.3-2006 Wrought aluminium and aluminium alloy
plates, sheets and strips for general engineering – Part 3. Tolerances on forms
and dimensions.
Compared with GB/T 3880.3-2006, the major technical changes in this Part are
as follows.
— EXPAND the maximum thickness from “150.00mm” to “250.00mm”;
— EXPAND the maximum width from “2,500.0mm” to “3,500.0mm”;
— MODIFY the maximum thickness of cold-rolled plates, sheets and strips
to “6.00mm”.
— MODIFY the requirements for the tolerances on thicknesses, widths,
lengths and diagonals as well as the side curvature of part of the high
precision grade of plates, sheets and strips.
This Part, using redrafting method, was formulated by making reference to EN
485.3-2003 Aluminium and aluminium alloys – Sheet, strip and plate – Part 3.
Tolerances on dimensions and form for hot-rolled products and EN 485.4-1994
Aluminium and aluminium alloys – Sheet, strip and plate – Part 4. Tolerances
on shape and dimensions for cold-rolled products. The consistent degree
BETWEEN this Part AND EN 485.3-2003 and EN 485.4-1994 is not equivalent.
This Part shall be under the jurisdiction of the National Technical Committee for
Standardization of Non-ferrous Metals (SAC/TC 243).
Drafting organizations of this Standard. Southwest Aluminum (Group) Co., Ltd.,
China Non-ferrous Metals Standards Metrology and Quality Institute, CHALCO
Ruimin Aluminum Strips Co., Ltd., Northeast Light Alloys Co., Ltd., Xiamen
Wrought aluminium and aluminium alloy plates,
sheets and strips for general engineering – Part 3.
Tolerances on forms and dimensions
1 Scope
This Part of GB/T 3880 specifies the tolerances on forms and dimensions of the
wrought aluminium and aluminium alloy plates, sheets and strips for general
engineering.
This Part is applicable to the wrought aluminium and aluminium alloy rolled
plates, sheets and strips for general engineering.
2 Classification and grading
2.1 Classification of aluminium or aluminium alloys
Aluminium and aluminium alloys are divided into Type A and Type B. SEE Table
1.
Table 1 Alloy Classification
Designation
series
Classification of aluminium or aluminium alloys
A B
1××× All -
2××× - All
3×××
The maximum content of Mn shall not be greater
than 1.8%. The maximum content of Mg shall not be
greater than 1.8%. The sum of the maximum content
of Mn and the maximum content of Mg shall not be
greater than 2.3%. For instance, 3003, 3103, 3005,
3105, 3102 and 3A21.
Other alloys except the Type
A, such as 3004 and 3104
4××× The maximum content of Si shall not be greater than 2%, such as 4006 and 4007.
Other alloys except the Type
A, such as 4015
5×××
The maximum content of Mg shall not be greater
than 1.8%. The maximum content of Mn shall not be
greater than 1.8%. The sum of the maximum content
of Mg and the maximum content of Mn shall not be
greater than 2.3%. For instance, 5005, 5005A and
5050.
Other alloys except the Type
A, such as 5A02, 5A03, 5A05,
5A06, 5040, 5049, 5449,
5251, 5052, 5154A, 5454,
5754, 5082, 5182, 5083, 5383
and 5086
Unit. mm
Table 6 Tolerances on Widths of Cold-rolled Plates and Sheets
3.2.1.2 Tolerances on widths of hot-rolled plates and sheets
For the hot-rolled plates and sheets supplied after trimming, the tolerances on
widths of plates and sheets shall conform to the provisions in Table 7. For the
hot-rolled plates and sheets supplied without trimming, the tolerances on widths
of plates and sheets shall be + 150mm or determined after the consultation
between supply and requisitioning parties, and shall be indicated in the order
forms (or contracts). When the requisitioning party has special requirements,
the tolerances on widths of plates and sheets shall be agreed upon by the
supply and requisitioning parties, and shall be indicated in the order forms (or
contracts) (the sum of the absolute values of the positive and negative
tolerances required for the requisitioning party shall be consistent with Table 7).
Table 7 Tolerances on Widths of Hot-rolled Plates and Sheets after Trimming
3.2.2 Tolerances on widths of strips
3.2.2.1 Tolerances on widths of cold-rolled strips
The tolerances on widths of cold-rolled strips shall conform to the provisions in
Table 8. The high precision grade needs to be negotiated by the supply and
requisitioning parties, and to be indicated in the order forms (or contracts) as
required. When there are no clear indications, the ordinary grade applies. When
Unit. mm
Ordinary
grade
Tolerances on thicknesses under the following widths
Tolerances on thicknesses under the following widths
Thickness
Thickness Grade
High precision grade
Hot-rolled
plates and
sheets
> 2.50~3.00 ≤ 0.4% ≤ 0.5% ≤ 0.5%
≤ 18mm ≤ 30mm
> 3.00~6.00 ≤ 0.3% ≤ 0.4% ≤ 0.35%
> 6.00~50.00 ≤ 0.2% ≤ 0.4% ≤ 0.3%
> 50.00~250.00 ≤ 0.2% ≤ 0.2%
Not required or
determined after
consultation
between supply
and requisitioning
parties
Note. L refers to the lengths of plates and sheets. W refers to the widths of plates and sheets. R refers to any chord
lengths of no less than 300mm. d refers to the wave heights.
a The end portion refers to the entire board at the end included within the length range of 300mm on both ends along the
longitudinal direction of plates and sheets. If the plates and sheets are square, the end portion refers to the board with
square rings within the range of 300mm around the edges.
3.5 Side curvature
3.5.1 Hot-rolled plates and sheets
The ordinary grade does not require the side curvature. The high precision
grade shall conform to the provisions in Table 14. The high precision grade
needs to be negotiated by the supply and requisitioning parties, and to be
indicated in the order forms (or contracts) as required. When there are no clear
indications, the ordinary grade applies.
3.5.2 Cold-rolled plates and sheets
The ordinary grade does not require the side curvature. The high precision
grade shall conform to the provisions in Table 15. The high precision grade
needs to be negotiated by the supply and requisitioning parties, and to be
indicated in the order forms (or contracts) as required. When there are no clear
indications, the ordinary grade applies.
3.5.3 Hot-rolled strips
Do NOT require the side curvature.
3.5.4 Cold-rolled strips
The ordinary grade does not require the side curvature. The high precision
grade shall conform to the provisions in Table 16. The high precision grade
needs to be negotiated by the supply and requisitioning parties, and to be
indicated in the order forms (or contracts) as required. When there are no clear
indications, the ordinary grade applies.
The ordinary grade does not require the tolerances on diagonals. The high
precision grade shall conform to the provisions in Table 18. The high precision
grade needs to be negotiated by the supply and requisitioning parties, and to
be indicated in the order forms (or contracts) as required. When there are no
clear indications, the ordinary grade applies.
Table 17 Tolerances on Diagonals of Hot-rolled Plates and Sheets –
High Precision Grade
Table 18 Tolerances on Diagonals of Cold-rolled Plates and Sheets –
High Precision Grade
4 Inspection methods for tolerances on dimensions
4.1 Rounding off of dimensions
The dimension measurements are not allowed to be rounded off.
4.2 Thickness
USE a micrometer with the accuracy of 0.01mm, or the measuring tools with
the same accuracy to measure the thicknesses of plates, sheets and strips.
Respectively KEEP away from the sides and the end portion for at least 10mm
and 115mm.
4.3 Width and length
Unit. mm
a The tolerances on diagonals shall be agreed upon by the supply and requisitioning parties, and shall also be indicated
in the order forms (or contracts).
Unit. mm
a The tolerances on diagonals shall be agreed upon by the supply and requisitioning parties, and shall also be indicated
in the order forms (or contracts).
Tolerances on thicknesses under the following widths
Tolerances on thicknesses under the following widths
Thickness Length
Length
......
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