GB/T 26036-2020 English PDF (GBT26036-2020)

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GB/T 26036-2020: Aluminum alloy die forgings for automobile wheels
GB/T 26036-2020
GB
NATIONAL STANDARD OF THE
PEOPLE’S REPUBLIC OF CHINA
ICS 77.150.10
H 61
Replacing GB/T 26036-2010
Aluminum Alloy Die Forgings for Automobile Wheels
ISSUED ON: JUNE 2, 2020
IMPLEMENTED ON: APRIL 1, 2021
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 ... 7 
4 Requirements ... 7 
5 Test Methods ... 13 
6 Inspection Rules ... 17 
7 Marking, Packaging, Transportation, Storage and Quality Certificate ... 22 
8 Order Form (or contract) Content ... 24 
Appendix A (normative) Test Method of Resistance to Crushed Stone Impact of
Paint Film ... 25 
Aluminum Alloy Die Forgings for Automobile Wheels
1 Scope
This Standard specifies the requirements, test methods, inspection rules, marking,
packaging, transportation, storage, quality certificate and order form (or contract)
content of aluminum alloy die forgings for automobile wheels.
This Standard is applicable to aluminum alloy automobile wheels (hereinafter referred
to as wheels).
2 Normative References
The following documents are indispensable to the application of this document. In
terms of references with a specified date, only versions with a specified date are
applicable to this document. In terms of references without a specified date, the latest
version (including all the modifications) is applicable to this document.
GB/T 231.1 Metallic Materials - Brinell Hardness Test - Part 1: Test Method
GB/T 629 Chemical Reagent - Sodium Hydroxide
GB 1787-2018 Aviation Piston Engine Fuels
GB/T 2933 Wheels and Rims for Pneumatic Tyres - Vocabulary, Designation and
Marking
GB/T 3190 Chemical Composition of Wrought Aluminum and Aluminum Alloys
GB/T 3199 Wrought Aluminum and Aluminum Alloy Products - Packing, Marking,
Transporting and Storing
GB/T 3246.1 Inspection Method for Structure of Wrought Aluminum and Aluminum
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 3487 Rims for Passenger Car
GB/T 5209 Pains and Varnishes - Determination of Resistance to Water - Water
Immersion Method
GB/T 5334 Performance Requirements and Test Methods of Passenger Car Wheels
GB/T 5909 Performance Requirements and Test Methods of Commercial Vehicles
Wheels
GB/T 6519 Process for Ultrasonic Inspection of Wrought Aluminum Alloy Products
GB/T 6682 Water for Analytical Laboratory Use - Specification and Test Methods
GB/T 7999 Standard Method for Direct Reading Spectrometric Analysis of Aluminum
and Its Alloys
GB/T 8005.1 Aluminum and Aluminum Alloy Terms and Definitions - Part 1: Product
and Method of Processing Treatment
GB/T 8013.3 Anodic Oxide Coatings and Organic Polymer Coatings on Aluminum and
Its Alloys - Part 3: Organic Polymer Coatings
GB/T 9286 Paints and Varnishes - Cross Cut Test for Films
GB/T 9761 Paints and Varnishes - Visual Comparison of the Color of Paints
GB/T 9769 Rim Contour Measure
GB/T 10125 Corrosion Tests in Artificial Atmospheres - Salt Spray Tests
GB/T 13893.2 Paints and Varnishes - Determination of Resistance to Humidity - Part
2: Condensation (in-cabinet exposure with heated water reservoir)
GB/T 15704 Road Vehicles - Light Alloy Wheels - Impact Test Procedure
GB/T 16865 Test Pieces and Method for Tensile Test for Wrought Aluminum and
Magnesium Alloys Products
GB/T 17432 Methods for Sampling for Analyzing the Chemical Composition of Wrought
Aluminum and Aluminum Alloys
GB/T 18851.1 Non-destructive Testing - Penetrant Testing - Part 1: General Principles
GB/T 20975 (all parts) Methods for Chemical Analysis of Aluminum and Aluminum
Alloys
GB/T 30512 Requirements for Prohibited Substances on Automobiles
GB/T 31961 Rims for Truck-bus
QC/T 240 Disc Wheels - Measurement Methods for Dimensional Characteristics of
Attachment on Hub
QC/T 242 Static Unbalance Requirements and Test Methods of Vehicle Wheels
4.11.2 The requirements for dynamic bending fatigue performance and dynamic radial
fatigue performance of commercial vehicle wheels shall comply with the requirements
of GB/T 5909.
4.12 Impact Performance
The visible cracks of the passenger car wheels shall not penetrate the cross section of
the central part of the wheels. The central part of the wheels shall not be separated
from the rims; within 1 min, the tire pressure shall not completely leak out. The
deformation of the passenger car wheels, or the fracture of the rim section caused by
direct impact by the hammer is allowed.
4.13 Appearance Quality
4.13.1 The surface of wheels shall be smooth and flat; there shall not be obvious burrs,
sharp edges and insufficient filling.
4.13.2 The paint film shall have no obvious defects like blistering, sagging, orange peel,
exposed base or scratches.
4.13.3 On the installation surface, center hole and nut seat surface of the wheels, there
shall be no dripping paint.
4.13.4 The marking of wheels shall be intact and clear.
5 Test Methods
5.1 Chemical Composition
Conduct the test in accordance with the methods specified in GB/T 20975 or GB/T
7999. The arbitration analytical method shall comply with the methods specified in
GB/T 20975.
5.2 Prohibited Substances
Conduct the test in accordance with the methods specified in GB/T 30512.
5.3 Dimensions
5.3.1 The inspection of rim contour shall be conducted in accordance with the methods
specified in GB/T 9769.
5.3.2 The inspection of flatness of wheel attachment face shall be conducted in
accordance with the methods specified in QC/T 243.
5.3.3 The inspection of bolt hole position shall be conducted in accordance with the
methods specified in QC/T 240.
Conduct the test in accordance with the methods specified in GB/T 8013.3, or, it shall
be determined through negotiation between the demand-side and the supply-side;
indicated in the order form (or contract).
5.9.4 Chromatic aberration
Conduct the test in accordance with the methods specified in GB/T 9761.
5.9.5 Pencil hardness
Conduct the test in accordance with the methods specified in GB/T 8013.3.
5.9.6 Resistance to crushed stone impact
Conduct the test in accordance with the methods specified in Appendix A.
5.9.7 Dry adhesion
Conduct the test in accordance with the methods specified in GB/T 9286.
5.9.8 Resistance to water
Resistance to water shall be tested in accordance with the methods specified in GB/T
5209. After the test, the sample shall be placed at room temperature for 24 h, then, in
accordance with the methods specified in GB/T 9286, conduct dry adhesion test.
5.9.9 Resistance to humidity and heat
Resistance to humidity and heat shall be tested in accordance with the methods
specified in the constant temperature and humidity test in GB/T 8013.3. After the test,
the sample shall be placed at room temperature for 24 h, then, in accordance with the
methods specified in GB/T 9286, conduct dry adhesion test.
5.9.10 Resistance to cold and heat cycles
Paint film’s resistance to cold and heat cycles shall be tested in accordance with the
following steps:
a) Place the sample into a constant temperature and humidity chamber at the
temperature of 90 °C ± 2 °C and the relative humidity of 20% ± 3%, maintain
for ...