GB/T 26027-2024 PDF English
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| Standard ID | Contents [version] | USD | STEP2 | [PDF] delivery | Name of Chinese Standard | Status |
| GB/T 26027-2024 | English | 260 |
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High damage tolerance aluminium alloy profiles
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| GB/T 26027-2010 | English | 519 |
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Aluminium and aluminium alloys drawn seamless tubes for large circumscribed circle diameter of cross section
| Obsolete |
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GB/T 26027-2024: High damage tolerance aluminium alloy profiles---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/GBT26027-2024
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.10
CCS H 61
Replacing GB/T 26027-2010
High damage tolerance aluminium alloy profiles
Issued on: APRIL 25, 2024
Implemented on: NOVEMBER 01, 2024
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... 9
7 Product qualification... 11
8 Process control... 11
9 Inspection rules... 11
10 Marking, packaging, transportation, storage and quality certificate... 15
11 Order form (or contract) contents... 16
High damage tolerance aluminium alloy profiles
1 Scope
This document specifies the product classification, technical requirements, test methods,
product qualification, process control, inspection rules, marking, packaging,
transportation, storage and quality certificate and order (or contract) contents of high
damage tolerance aluminum alloy profiles.
This document applies to high damage tolerance aluminum alloy profiles (hereinafter
referred to as “profiles”).
2 Normative references
The following documents are referred to in the text in such a way that some or all of
their content constitutes requirements 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 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 3246.2, Inspection method for structure of wrought aluminum and aluminum
alloy products - Part 2.Inspection method for macrostructure
GB/T 3251, Compression test method for aluminium and aluminium alloy products
GB/T 6519-2024, Ultrasonic inspection of wrought aluminium and magnesium
alloy products
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
5.7 Ultrasonic flaw detection acceptance grade
The ultrasonic flaw detection results of profiles shall comply with Grade A in GB/T
6519-2024.
5.8 Macro-structure
Cracks, stratification, shrinkage tails, pores, bright grains, metal inclusions, and non-
metallic inclusions are not allowed to exist on the macro-structure samples of the
profiles. The depth of the coarse grain ring at the corners of the profiles is allowed to
exceed 3 mm, but not allowed to exceed 5 mm. The depth of the coarse grain ring in
other parts shall not be greater than 3 mm. When the buyer has requirements for grain
size, it shall be determined by negotiation between the supplier and the buyer, and
indicated in the order (or contract).
5.9 Microstructure
Over-burning is not allowed in the profile microstructure.
5.10 Appearance quality
5.10.1 Metal indentation, non-metal indentation, cracks, bubbles, or surface corrosion
are not allowed on the profile surface; however, water marks are permitted.
5.10.2 Mold marks, pits, bumps, scratches, dents, straightening marks, and abrasions
that do not exceed half of the negative deviation value are allowed on the profile surface.
The supplier is allowed to grind it longitudinally to a smooth surface. After grinding,
the wall thickness deviation of the profile shall not exceed its allowable deviation range.
6 Test methods
6.1 Chemical composition
The chemical composition analysis of the profiles shall be carried out according to the
methods specified in GB/T 20975 (all parts) or GB/T 7999.The arbitration shall be
carried out according to the methods specified in GB/T 20975 (all parts).
6.2 Dimension deviation
The dimension deviation of the profile shall be tested in accordance with the method
specified in GB/T 14846-2014.
6.3 Room temperature tensile mechanical properties
The room temperature tensile mechanical properties of the profiles shall be tested
according to the method specified in GB/T 16865.When the buyer has special
requirements for sample selection, the supplier and the buyer can refer to GB/T 16865
for negotiation and determination, and indicate it in the order (or contract).
6.4 Compression properties
The compression properties of the profile shall be tested according to the method
specified in GB/T 3251.
6.5 Conductivity
6.5.1 Conductivity of test pieces
The conductivity of test pieces of the profiles shall be tested according to the method
specified in GB/T 12966.When using tensile test pieces, if the profile size and surface
cannot meet the test requirements, the supplier and the buyer may refer to GB/T 12966
to agree on the test method and indicate it in the order (or contract).
6.5.2 Conductivity uniformity
The conductivity uniformity test of the profile shall be carried out on the profile surface
according to the method specified in GB/T 12966.
6.6 Exfoliation corrosion resistance
The exfoliation corrosion resistance of the profile shall be tested according to the
method specified in GB/T 22639-2022.
6.7 Ultrasonic flaw detection acceptance grade
The ultrasonic flaw detection acceptance grade of the profiles shall be evaluated in
accordance with the provisions of GB/T 6519-2024.The ultrasonic inspection method
shall be determined by negotiation between the supplier and the buyer and shall be
indicated in the drawing, order form (or contract). If not specified, use the contact
method.
6.8 Macro-structure
The macro-structure of the profile shall be tested according to the method specified in
GB/T 3246.2.
6.9 Microstructure
The microstructure of the profile shall be tested according to the method specified in
GB/T 3246.1.
6.10 Appearance quality
Visually inspect the product surface quality under natural diffuse light. When the defect
depth is difficult to determine, measurement after polishing is allowed.
6.11 Other tests
Other tests on profiles shall be carried out according to the methods specified in GB/T
42792.
7 Product qualification
Profile production shall pass relevant certification and system evaluation, and product
qualification shall comply with the provisions of GB/T 42792.
8 Process control
The process control of profiles shall comply with the provisions of GB/T 42792.
9 Inspection rules
9.1 Inspection and acceptance
9.1.1 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 (or the contract);
the supplier shall fill in the quality certificate.
9.1.2 The buyer shall inspect the received products in accordance with the provisions
of this document. When the inspection results are inconsistent with the provisions of
this document and the order (or contract), they shall be submitted to the supplier in
writing and resolved through negotiation between the supplier and the buyer.
Objections to appearance quality and dimension deviation shall be raised within one
month from the date of receipt of the product, and objections to other performance
issues shall be raised within three months from the date of receipt of the product.
Arbitration, if required, can be entrusted to a unit recognized by both the supplier and
the buyer, and samples shall be taken on the buyer’s side by the three parties jointly.
9.2 Batch
Products shall be submitted for acceptance in batches, and each batch shall consist of
products of the same designation, state, batch furnace, heat treatment furnace, and
dimensions. Requirements for batch weight, if any, shall be determined by negotiation
between the supplier and the buyer and indicated in the order (or contract).
9.3 Weight
The product shall be weighed on the scales.
9.4 Inspection items
9.6.1 If the chemical composition of any sample fails to meet the requirements, judge
the batch of products to be unqualified.
9.6.2 If the dimension deviation of any product fails to meet the standards, judge the
product to be unqualified.
9.6.3 If the room temperature tensile mechanical properties and compression properties
of any sample fail to meet the standards, double the number of samples from the batch
of products shall be taken to repeat the test on the failed item. When all repeated test
results are qualified, judge the batch of products to be qualified. If there are still
unqualified samples in the repeated test results, judge the batch of products to be
unqualified. After negotiation between the supplier and the buyer, the supplier is
allowed to inspect each piece and deliver the qualified ones.
9.6.4 If the conductivity of any sample (or product) fails to meet the standards, the
following criteria shall apply.
-- If the conductivity of the test sample piece is unqualified, the supplier shall
inspect each piece one by one and deliver the qualified ones;
-- If the conductivity uniformity of a single piece fails to meet the requirements,
judge the piece to be unqualified. If the conductivity uniformity of the same
batch fails to meet the requirements, judge the batch to be unqualified.
9.6.5 If the exfoliation corrosion resistance of any sample fails to meet the requirements,
double the number of samples shall be taken from the batch of products for repeated
testing. When all repeated test results are qualified, judge the batch of products to be
qualified. If there are still unqualified samples in the repeated test results, judge the
batch of products to be unqualified.
9.6.6 If any product fails the ultrasonic flaw detection acceptance grade, for fixed-
length products, judge as unqualified; for non-fixed-length products, it is allowed to
remove the defective parts and re-inspect them. Only qualified ones can be delivered.
9.6.7 If the macro-structure of any test sample fails to meet the standards, the following
criteria shall apply.
-- If the products are unqualified due to defects such as cracks, pores, bright
grains, metal inclusions, non-metallic inclusions, etc., judge the batch of
products as unqualified. However, upon agreement between the supplier and
the buyer, the supplier may inspect each piece and deliver the qualified ones;
-- If the product fails to meet the standards due to stratification, tail shrinkage or
coarse crystal ring, it is allowed to cut off a section from the extrusion tail end
of the product and repeat the test until it passes the test. The other products in
the batch shall be cut off according to the maximum length of the above-
mentioned defect distribution of the inspected product or tested one by one,
and those that pass the test will be delivered.
9.6.8 If the microstructure of any sample fails to meet the standards, judge the batch of
products as unqualified.
9.6.9 If the appearance quality of any product fails to meet the standards, judge the
product to be unqualified.
10 Marking, packaging, transportation, storage and quality
certificate
10.1 Marking
10.1.1 Product marking
Product marking shall comply with the provisions of GB/T 42916.
10.1.2 Package marking
The package marking of the product shall comply with the provisions of GB/T 3199.
10.2 Packaging
The packaging of the product shall comply with the provisions of GB/T 3199.If the
buyer has special requirements, the supplier and the buyer shall negotiate and determine
and indicate them in the order (or contract).
10.3 Transportation and storage
The transportation and storage of the product shall comply with the provisions of GB/T
3199.
10.4 Quality certificate
Each batch of products shall be accompanied by a quality certificate, which shall
include the following.
a) name of supplier and ordering party;
b) product name.
c) designation, state, dimensions (or cross-section code);
d) batch number, contract number;
e) net weight or number of pieces;
......
Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al.
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