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GB/T 6891-2018 PDF in English


GB/T 6891-2018 (GB/T6891-2018, GBT 6891-2018, GBT6891-2018)
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GB/T 6891-2018: PDF in English (GBT 6891-2018)

GB/T 6891-2018
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.10
H 61
Replacing GB/T 6891-2006
Aluminum and Aluminum Alloy Profiled Sheet
ISSUED ON: MAY 14, 2018
IMPLEMENTED ON: FEBRUARY 01, 2019
Issued by: State Administration for Market Regulation;
Standardization Administration of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Normative References ... 6
3 Requirements ... 7
4 Test Methods ... 13
5 Inspection Rules ... 14
6 Marking, Package, Transportation, Storage and Quality Certificate ... 21
7 Ordering Form (or Contract) Contents ... 22
Appendix A (Informative) Typical Sheet Type of the Product and Example of
connection structure ... 24
Bibliography ... 26
Aluminum and Aluminum Alloy Profiled Sheet
1 Scope
This Standard specifies the requirements, test methods, inspection rules, marking,
package, transportation, storage, quality certificate, and ordering form (or contract)
contents of aluminum and aluminum profiled sheet.
This Standard is applicable to the aluminum and aluminum alloy profiled sheet
(hereinafter referred to as profiled sheet) for the civil buildings, building envelopes, and
automobile bodies.
2 Normative References
The following documents are essential to the application of 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) are applicable to this document.
GB/T 3190 Wrought Aluminum and Aluminum Alloys-Chemical Composition Limits
GB/T 3199 Wrought Aluminum and Aluminum Alloy Products - Packing, Marking,
Transporting and Storing
GB/T 3880.1 Wrought Aluminum and Aluminum Alloy Plates, Sheets and Strips for
General Engineering - Part 1: Technical Conditions of Delivery
GB/T 3880.2 Wrought Aluminum and Aluminum Alloy Plates, Sheets and Strips for
General Engineering - Part 2: Mechanical Properties
GB/T 3880.3 Wrought Aluminum and Aluminum Alloy Plates, Sheets and Strips for
General Engineering - Part 3: Tolerances on Forms and Dimensions
GB/T 7999 Optical Emission Spectrometric Analysis Method of Aluminum and
Aluminum Alloys
GB/T 8013.3 Anodic Oxide Coatings and Organic Polymer Coatings on Aluminum
and Its Alloys - Part 3: Organic Polymer Coatings
GB/T 8170 Rules of Rounding off for Numerical Values & Expression and
Judgement of Limiting Values
layer code.
Example 1:
The marking for uncoated profiled sheet with designation of 3105, state of H16, model of
YX10001, length of 6000mm is as follows:
Profiled sheet GB/T 6891-3105H16-YX10001×6000
Example 2:
The marking for the polyester paint roller coating profiled sheet with designation of 3105, state
of H46, model of YX10001, length of 6000mm, color number of 2345, film layer code of LRA15
is as follows:
Profiled sheet GB/T 6891-3105H46-YX10001×6000 color 2345LRA15
3.2 Quality assurance
3.2.1 Base material
The quality of base material shall conform to the provisions of GB/T 3880.1.
3.2.2 Fluorocarbon paint coating
The quality of fluorocarbon paint coating can refer to A.2.3 of GB/T 5237.5-2017.
3.3 Chemical composition
The chemical composition of the profiled sheet shall conform to the provisions of GB/T
3190.
3.4 Size deviation
3.4.1 The cross-sectional dimension of the profiled sheet shall conform to the
provisions of the drawings specified by both the supplier and the purchaser. The
marking of the cross-sectional dimension can refer to Figure 1.
Key:
B – width;
Hardness
After the pencil scratch test, the
hardness of the film layer shall be
no less than HB
After the pencil scratch test, the
hardness of the film layer shall be
no less than 1H
Adhesion
Dry
adhesion Reach Level-0 or Level-I Reach Level-0
Wet
adhesion --- Reach Level-0
Boiling-
water
adhesion
--- Reach Level-0
Coating flexibility a If it is ≤2T, the film layer shall be free of cracks or peeling off ---
Impact resistance
The film layer shall be free of cracks
or peeling off after the impact test
(square impact)
The film layer is allowed to crack
slightly after the impact test (impact
of recoil); however, when the
adhesive tape is used for further
inspection, the surface of the film
layer shall be free of stick-falling
phenomenon
High temperature
water boiling
resistance
---
The appearance of the film layer
after the test shall be free of
peeling, blistering, wrinkling, etc.;
the adhesion shall reach Level-0
Wear resistance --- Sand-falling test results: the wear factor shall be no less than 1.6L/µm
Hydrochloric acid
resistance
After the hydrochloric acid resistance test, there shall be no bubbles,
discoloration or other obvious changes
Nitric acid resistance ---
After the nitric acid resistance test,
compare the exposed and
unexposed samples, the color
change ΔE * ab≤5
Mortar resistance After the mortar resistance test, there is no peeling off or other obvious changes
Solvent resistance
70 times
without
revealing
100 times without
revealing
Wipe for 100 times, the film layer
after wiping has no revealing
phenomenon
Table 3 – Continued
Item
Film layer performance of the following coating sheet
Roller coating Spray coating
LRA15 LRF2-25 LRF3-34 LF2-25 LF3-34 LF4-55
Detergent resistance --- There shall be no blistering or other obvious changes; the
It shall be carried out as per the pencil hardness method specified in GB/T 8013.3.
4.4.2 Flexibility
It shall be carried out as per the T-bending method specified in GB/T 8013.3.
4.4.3 Hydrochloric acid resistance
4.4.3.1 The hydrochloric acid resistance of the spray coated profiled sheet shall be
carried out as per the dripping method specified in GB/T 8013.3.
4.4.3.2 The hydrochloric acid resistance of the roller coated profiled sheet shall be
carried out as per the standing method specified in GB/T 8013.3.
4.4.4 Nitric acid resistance
It shall be carried out as per the gas phase method specified in GB/T 8013.3.
4.4.5 Solvent resistance
It shall be carried out as per the Wiping Method II specified in GB/T 8013.3.
4.4.6 Heat and humidity resistance
It shall be carried out as per the constant heat and humidity test method specified in
GB/T 8013.3.
4.4.7 Other film layer performances
Other film layer performances shall be carried out as per the provisions of GB/T 8013.3.
4.5 Appearance quality
The appearance quality shall be tested as per the visual examination or method agreed
by the supplier and the purchaser.
5 Inspection Rules
5.1 Inspection and acceptance
5.1.1 The product shall be inspected by the supplier to ensure that the product quality
conforms to the provisions of this Standard and ordering form (or contract); and fill in
the quality certificate.
5.1.2 The purchaser shall inspect the received products as per the provisions of this
Standard. If the inspection results are inconsistent with the provisions of this Standard
and the ordering form (or contract), it shall be proposed to the supplier in written form;
5.7.7 When the appearance quality of any specimen is unqualified, then such profiled
sheet shall be judged to be unqualified.
6 Marking, Package, Transportation, Storage and
Quality Certificate
6.1 Marking
6.1.1 Product marking
On the products that pass the inspection, there shall be the following contents (or
labels with the following contents):
a) Supplier’s name and address;
b) Product name;
c) Seal of the supplier’s quality inspection department (or signature or stamp of the
quality inspection personnel);
d) Designation, state and size specification (or model);
e) Film layer code and color (or color number);
f) Product batch number or date of production;
g) This Standard number.
6.1.2 Marking on package box
The marking on package box of the product shall conform to the provisions of GB/T
3199.
6.2 Package, transportation and storage
6.2.1 When profiled sheets are packaged, it shall be folded in a simple package. The
sheet stack shall be covered with Kraft paper; cover a thin layer of plastic film on top
of the sheet stack; then bundle with strapping band or steel strip. The height of each
profiled sheet stack shall not exceed 500mm; the gross weight per stack is no more
than 2t. Wooden boards or foam boards are needed to separate the profiled sheets
during bundling period; never damage the profiled sheet; the package shall be rain
proof.
6.2.2 During the transportation period, there shall be reliable support or fixing
measures; avoid non-uniform extrusion, mechanical damage, rain and damp. Others
shall conform to the provisions of GB/T 3199.
6.2.3 The profiled sheet shall be stored in a dry and ventilated indoor environment.
When stored in the open air, it shall be covered by rainproof cover; and there shall be
a slop of no less than 3% in the direction of drainage to prevent the water accumulation.
6.3 Quality certificate
Each batch of profiled sheets shall be attached with quality certificate indicating:
a) Supplier’s name;
b) Product name;
c) Designation, state and size specification (or model);
d) Film layer code and color (or color number);
e) Batch number or date of production;
f) Weight or number of pieces;
g) Results of each analysis and inspection; and seal for the supplier’s quality
inspection department;
h) This Standard number.
7 Ordering Form (or Contract) Contents
The ordering form (or contract) ordering the profiled sheets listed in this Standard shall
include the following contents:
a) Supplier’s name;
b) Product name;
c) Designation, state and size specification (or model);
d) Size deviation, accuracy level;
e) Film layer luster value, film layer code and color (or color number);
f) Weight or number of pieces;
g) The purchaser’s special requirements.
--- Test requirements for wear resistance;
......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.