GB/T 33824-2025 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 33824-2025 | English | 245 |
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Aluminium and aluminium alloys sheet and strip for cans and caps of new energy power batteries
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| GB/T 33824-2017 | English | 145 |
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Aluminum and aluminum alloys plates, sheets and strips for cans and caps of new energy power batteries
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Similar standards GB/T 51033 GB/T 33824-2025: Aluminium and aluminium alloys sheet and strip for cans and caps of new energy power batteries
---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/GBT33824-2025
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.10
CCS H 61
Replacing GB/T 33824-2017
Aluminium and aluminium alloys sheet and strip for cans
and caps of new energy power batteries
Issued on: AUGUST 01, 2025
Implemented on: FEBRUARY 01, 2026
Issued by. State Administration for Market Regulation;
Standardization Administration of the People’s Republic of China.
Table of Contents
Foreword... 3
1 Scope... 5
2 Normative references... 5
3 Terms and definitions... 6
4 Product classification... 6
5 Technical requirements... 7
6 Test methods... 11
7 Test rules... 12
8 Marking, packaging, transportation, storage and accompanying documents... 16
9 Order form content... 17
Appendix A (Informative) Examples of sheet and strip texture analysis results... 18
Appendix B (Informative) Sheet and strip texture test method... 21
Bibliography... 25
Aluminium and aluminium alloys sheet and strip for cans
and caps of new energy power batteries
1 Scope
This document specifies the product classification, technical requirements, test methods,
inspection rules, marking, packaging, transportation, storage, and accompanying
documents and order form contents of aluminum and aluminum alloys sheet and strip
for cans and caps of new energy power batteries.
This document applies to aluminium and aluminium alloys sheet (hereinafter referred
to as “sheet”) as well as aluminium and aluminium alloys strip (hereinafter referred to
as "strip") for cans and caps of new energy power batteries used in electric vehicles,
electric bicycles, power energy storage, communication energy storage and other fields.
This document is also applicable to aluminum and aluminum alloys sheet and strip used
for battery boxes, explosion-proof disks, explosion-proof valves, welding rings, pole
ears, pole blocks, pole posts, connecting pieces, flexible connectors, side panels, etc.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this
document and are indispensable for its application. For dated references, only the
edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
GB/T 2523, Measuring method of surface roughness, peak count and waviness for
cold-rolled metal sheet and strip
GB/T 3190, Wrought aluminum and aluminum alloy - Chemical composition
GB/T 3199, Wrought aluminium and aluminium alloy products - Packing, marking,
transporting and storing
GB/T 3246.1, Inspection method for structure of wrought aluminium and
aluminium alloy products - Part 1.Inspection method for microstructure
GB/T 3880.1, Wrought aluminium and aluminium alloy plates, sheets and strips
for general engineering - Part 1.Technical conditions of delivery
GB/T 3880.3-2024, Wrought aluminium and aluminium alloy plates, sheets and
strips for general engineering - Part 3.Tolerances on forms and dimensions
GB/T 4156, Metallic materials - Sheet and strip - Erichsen cupping test
GB/T 5125, Method for deep drawing cups testing of non-ferrous metals
GB/T 7999, Optical emission spectrometric analysis method of aluminum and
aluminum alloys
GB/T 8005.1, Aluminium and aluminium alloy terms and definitions - Part 1.
Product and method of processing and treatment
GB/T 12966, The methods for determining aluminium and aluminium alloys
conductivity using eddy current
GB/T 16865, Test pieces and method for tensile test for wrought aluminium and
magnesium alloys products
GB/T 17432, Methods of sampling for analyzing the chemical composition of
wrought aluminum and aluminum alloys
GB/T 20975 (All parts), Methods for chemical analysis of aluminium and
aluminium alloys
GB/T 22588, Determination of thermal diffusivity or thermal conductivity by the
flash method
GB/T 26492.3, Defects for wrought aluminium and aluminium alloys ingots and
products - Part 3.Defects for plates, sheets and strips
GB/T 42916, Identification marking of aluminium and aluminium alloy products
3 Terms and definitions
For the purpose of this document, terms and definitions given in GB/T 8005.1 and GB/T
26492.3 apply.
4 Product classification
4.1 Designation, state and dimensions
The designation, state and dimensions of sheets and strips are shown in Table 1.Other
designations, states and dimensions, if required by the buyer, shall be negotiated
between the supplier and the buyer, and indicated in the order.
4.2 Product identification
Product markings are indicated in the order of product name, document number,
designation, state and dimensions. Examples of marking are as follows.
Example 1.
The sheet, of designation 3003, H14 state, thickness 0.50 mm, width 314.0 mm, and
length 1 032.0 mm, is marked as.
Sheet GB/T 33824-3003H14-0.50×314.0×1032.0
Example 2.
The strip, of designation 1060, O state, thickness 1.00 mm, width 1 260.0 mm, is
marked as.
Strip GB/T 33824-1060O-1.00×1260.0
5 Technical requirements
5.1 Chemical composition
The chemical composition of the product shall comply with the requirements of GB/T
3190.Special requirements, if required by the buyer, shall be determined through
negotiation between the supplier and the buyer and shall be indicated in the order form.
5.2 Dimensional deviation
5.2.1 Thickness
The thickness deviation of sheets and strips shall comply with the requirements of GB/T
3880.3-2024 for medium and high precision grades.
5.2.2 Width
When the buyer has requirements for the salt spray corrosion resistance of the sheets
and strips used for battery cans, caps and side panels, this shall be indicated in the order
form, and the supplier shall provide the salt spray corrosion test results.
5.9 Microstructure
5.9.1 Requirements for the grain size of sheets and strips, if required by the buyer, shall
be determined through negotiation between the supplier and the buyer, and indicated in
the order form.
5.9.2 When the supplier and the buyer disagree on the earing ratio or cupping value test
results, the texture may be measured and the texture test results provided. Appendix A
gives examples of texture analysis results for sheets and strips of different earing ratios.
5.10 Appearance quality
5.10.1 The burr height on the edge of the strip should not exceed the minimum of 4%·T
(T is the nominal thickness) and 0.045 mm.
5.10.2 Other appearance qualities of sheets and strips shall comply with the
requirements of GB/T 3880.1.
6 Test methods
6.1 Chemical composition
Chemical composition analysis shall be carried out in accordance with the provisions
of GB/T 20975 (all parts) or GB/T 7999, and arbitration analysis shall be carried out in
accordance with the provisions of GB/T 20975 (all parts).
6.2 Dimensional deviation
The surface roughness test shall be carried out in accordance with the provisions of
GB/T 2523, and other dimensional deviation tests shall be carried out in accordance
with the provisions of GB/T 3880.3-2024.
6.3 Mechanical properties
The mechanical properties test shall be carried out in accordance with the provisions of
GB/T 16865.
6.4 Earing ratio
The earing ratio test shall be carried out in accordance with the provisions of GB/T
5125.
6.5 Cupping value
The cupping value test shall be carried out in accordance with the provisions of GB/T
4156.
6.6 Conductivity
The conductivity test shall be carried out in accordance with the provisions of GB/T
12966.
6.7 Thermal conductivity
The thermal conductivity test shall be carried out in accordance with the provisions of
GB/T 22588.
6.8 Salt spray corrosion resistance
The salt spray corrosion test method shall be determined by negotiation between the
supplier and the buyer and shall be indicated in the order form.
6.9 Microstructure
The grain size test shall be carried out in accordance with the provisions of GB/T 3246.1.
The test method for texture is shown in Appendix B.
6.10 Appearance quality
6.10.1 Burr height
Select the trimming positions on both sides of the strip and cut the samples along the
trimming edge. The sample length shall be greater than 30 cm. Use a measuring tool of
corresponding accuracy to measure the distance from the top of the burr to the edge of
the sample. If necessary, measurements can be made with the aid of an image measuring
instrument or microscope.
6.10.2 Other appearance qualities
The appearance quality inspection of sheets and strips shall be carried out in accordance
with the provisions of GB/T 3880.1.
7 Test rules
7.1 Inspection and acceptance
7.1.1 The product shall be inspected by the supplier to ensure that the product quality
complies with the requirements of this document and the order form; the supplier shall
fill in the quality certificate.
7.1.2 The buyer shall re-inspect the products received in accordance with the provisions
of this document. If the inspection result does not conform to the provisions of this
products shall be judged as unqualified. If any other dimensional deviation of any sheet
fails to meet the standards, judge the batch of products as unqualified. After consultation
between the supplier and the buyer, the supplier is allowed to inspect each sheet one by
one and deliver the qualified ones. If any other dimensional deviation of any strip fails
to meet the standards, judge the roll as unqualified.
7.6.3 If the room temperature tensile mechanical properties of any sample fail to meet
the requirements, double the number of samples from the batch (furnace) of products
shall be taken for repeated testing (including the products represented by the first
unqualified sample). If all the repeated test results meet the requirements, judge the
batch (furnace) of products as qualified. If there are still samples with unqualified test
results in the repeated tests, judge the batch (furnace) of products as unqualified. Upon
agreement between the supplier and the buyer, the supplier is allowed to inspect each
sheet (roll or furnace) and deliver those that pass the inspection. The supplier is also
allowed to perform a repeated heat treatment to re-sample and test.
7.6.4 If the earing ratio of any sample fails to meet the requirements, double the number
of samples shall be taken from the batch (furnace) of products and repeated tests shall
be conducted. If all the repeated test results are qualified, judge the batch (furnace) of
products as qualified. If the result of sample properties are still unsatisfactory in the
repeated test, then, judge the batch (furnace) of products to be unqualified. Upon
agreement between the supplier and the buyer, the supplier is allowed to inspect each
sheet (roll or furnace) and deliver those that pass the inspection. The supplier is also
allowed to perform a repeated heat treatment to re-sample and test.
7.6.5 If the cupping value of any sample fails to meet the requirements, double the
number of samples shall be taken from the batch (furnace) of products and repeated
tests shall be conducted. If all the repeated test results are qualified, judge the batch
(furnace) of products as qualified. If the result of sample properties are still
unsatisfactory in the repeated test, then, judge the batch (furnace) of products to be
unqualified. Upon agreement between the supplier and the buyer, the supplier is
allowed to inspect each sheet (roll or furnace) and deliver those that pass the inspection.
The supplier is also allowed to perform a repeated heat treatment to re-sample and test.
7.6.6 If the grain size of any sample fails to meet the requirements, double the number
of samples shall be taken from the batch of products for repeated testing. If all repeated
test results are qualified, judge the batch of products as qualified. If there are still
samples with unqualified test results in the repeated tests, judge the batch of products
as unqualified.
7.6.7 If the burr height of any strip sample fails to meet the requirements, double the
number of samples shall be taken from the batch of products for repeated testing. If all
repeated test results are qualified, judge the batch of products as qualified. If there are
still samples with unqualified test results in the repeated tests, judge the batch of
products as unqualified. If it is agreed by both the supplier and the buyer, the supplier
is allowed to inspect the products one by one and deliver those qualified ones. If any
other appearance quality of a product fails to meet the standards, judge the sheet (roll)
of product as unqualified.
8 Marking, packaging, transportation, storage and
accompanying documents
8.1 Marking
Product marking shall comply with the provisions of GB/T 42916.
8.2 Packaging, transportation, storage
8.2.1 Sheets and strips shall not be packed with paper. When the buyer requires paper
padding, film coating or oil coating, "paper padding", "film coating" or "oil coating"
shall be indicated in the order form.
8.2.2 Other packaging, transportation and storage requirements shall comply with the
provisions of GB/T 3199.
8.3 Accompanying documents
Each batch of products shall be accompanied by a quality certificate that complies with
the requirements of this document (to ensure the validity of relevant inspection
documents, the quality certificate may not be provided with the product), which shall
state.
a) name of the supplier;
b) product name.
c) designation, state;
d) dimensions;
e) batch number (or roll number);
f) net weight or number of boxes (sheets), rolls;
g) inspection results of various inspection items;
h) number of this document;
i) inspection stamp of the supplier's quality inspection department;
j) packaging date (or factory date).
9 Order form content
An order form for the products listed in this document shall include the following.
a) product name.
b) designation, state.
c) dimensions.
d) weight (or number of sheets).
e) When ordering strips, whether they come with a sleeve, the inner diameter of
the sleeve, and the material of the sleeve shall be indicated.
f) special requirements of the buyer.
● special designation, state, and dimensions;
● special dimensional deviation requirements;
● special mechanical property requirements;
● conductivity testing required;
● thermal conductivity testing required;
● salt spray corrosion resistance inspection and test conditions required;
● grain size testing required;
● paper padding, film coating or oil coating required;
● other special requirements.
g) number of this document.
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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